v0.28.1 cc7ba64

web_mr_test.go RawHistoryFolder

1// SPDX-License-Identifier: AGPL-3.0-or-later
2
3package app
4
5import (
6	"fmt"
7	"html"
8	"net/http"
9	"net/url"
10	"regexp"
11	"strings"
12	"testing"
13	"time"
14
15	"github.com/stretchr/testify/assert"
16	"github.com/stretchr/testify/require"
17
18	"bnema.dev/ermite/internal/domain"
19	"bnema.dev/ermite/internal/ports"
20)
21
22// mrRepo is a public repository "proj" with README.md on main and a branch
23// feat/search that is one commit ahead of it (search.go, three lines).
24type mrRepo struct {
25	*cliHarness
26	wt, url string
27}
28
29func newMRRepo(t *testing.T, vis domain.Visibility) *mrRepo {
30	t.Helper()
31	c := newCLIHarness(t)
32	_, err := c.forge.Repos.Create(c.ctx, domain.Root(), createParams(c.harness, "proj", vis))
33	require.NoError(t, err)
34	r := &mrRepo{cliHarness: c, wt: c.workTree("main", "README.md"), url: c.urlAuth(adminToken, "/proj.git")}
35	c.mustGit(r.wt, "push", "-q", r.url, "main")
36	c.mustGit(r.wt, "checkout", "-q", "-b", "feat/search")
37	c.writeFile(r.wt, "search.go", []byte("package search\n\nfunc Find() {}\n"))
38	c.mustGit(r.wt, "push", "-q", r.url, "feat/search")
39	return r
40}
41
42func (r *mrRepo) headOf(branch string) string { return r.bareGit("proj", "rev-parse", branch) }
43
44// form posts url-encoded values as the signed-in owner, from this site.
45func (b browser) form(path, token string, values url.Values) page {
46	b.h.t.Helper()
47	return b.do("POST", path, post(token), values.Encode())
48}
49
50var reHeadField = regexp.MustCompile(`name="head_id" value="([0-9a-f]{40})"`)
51
52// formHead reads the head the merge form of a page carries.
53func formHead(t *testing.T, body string) string {
54	t.Helper()
55	m := reHeadField.FindStringSubmatch(body)
56	require.Len(t, m, 2, "the page has a merge form")
57	return m[1]
58}
59
60// AC7: the pages as an anonymous visitor sees them on a public repository:
61// read-only, no forms, public cache headers; the same pages signed in carry
62// the forms and the private headers.
63func TestWebMergeRequestPagesRender(t *testing.T) {
64	r := newMRRepo(t, domain.VisibilityPublic)
65	b := browser{r.harness}
66	token := r.signIn(t)
67
68	// The compare page: anonymous reads, the owner gets the form.
69	anon := b.get("/proj/compare/feat/search", nil)
70	require.Equal(t, 200, anon.status, anon.body)
71	assert.Equal(t, "no-cache", anon.hdr.Get("Cache-Control"))
72	assert.Equal(t, []string{"Accept-Encoding"}, anon.hdr.Values("Vary"))
73	assert.Contains(t, anon.body, "feat/search")
74	assert.Contains(t, anon.body, `<span class="kn">package</span> search</td>`, "the diff of the single commit")
75	assert.NotContains(t, anon.body, "<form class=\"cform create\"")
76	assert.NotContains(t, anon.body, `<form class="cform create"`)
77	assertNoInline(t, anon.body)
78	owner := b.get("/proj/compare/feat/search", as(token))
79	require.Equal(t, 200, owner.status)
80	assert.Equal(t, "private, no-store", owner.hdr.Get("Cache-Control"))
81	assert.Contains(t, owner.hdr.Values("Vary"), "Cookie")
82	assert.Contains(t, owner.body, `<form class="cform create" method="post" action="/proj/merge-requests">`)
83	assert.Contains(t, owner.body, `name="source" value="feat/search"`)
84	assert.Contains(t, owner.body, `name="target" value="main"`)
85	assert.Equal(t, 404, b.get("/proj/compare/nope", nil).status)
86	assert.Equal(t, 404, b.get("/proj/compare/main/extra", nil).status)
87	main := b.get("/proj/compare/main", nil)
88	assert.Equal(t, 200, main.status)
89	assert.Contains(t, main.body, "nothing to compare")
90
91	// An empty list, with the way to start one.
92	list := b.get("/proj/merge-requests", nil)
93	require.Equal(t, 200, list.status)
94	assert.Contains(t, list.body, "no open merge requests")
95	assert.Contains(t, list.body, `href="/proj/compare/feat/search"`)
96	assert.Contains(t, list.body, `data-key="m"`, "the section of the nav")
97	assert.NotContains(t, strings.ToLower(list.body), "proposal")
98
99	// Open one from the compare page.
100	res := b.form("/proj/merge-requests", token, url.Values{
101		"source": {"feat/search"}, "target": {"main"}, "title": {"Add <b>search</b>"},
102		"description": {"## Summary\r\n\r\nFinds **things** with `Find()`.\r\n\r\n- See https://example.org/spec) and javascript:alert(1)\r\n- [x](javascript:alert(1)) <script>alert(1)</script>"},
103	})
104	require.Equal(t, http.StatusSeeOther, res.status, res.body)
105	assert.Equal(t, "/proj/merge-requests/1", res.hdr.Get("Location"))
106	assert.Equal(t, "no-store", res.hdr.Get("Cache-Control"))
107	head := r.headOf("feat/search")
108
109	// The same pair twice is refused with a page, and nothing is created.
110	dup := b.form("/proj/merge-requests", token, url.Values{"source": {"feat/search"}, "target": {"main"}, "title": {"dup"}})
111	assert.Equal(t, http.StatusConflict, dup.status)
112	assert.Equal(t, "no-store", dup.hdr.Get("Cache-Control"))
113	assert.Contains(t, dup.body, "already exists")
114	bad := b.form("/proj/merge-requests", token, url.Values{"source": {"feat/search"}, "target": {"main"}, "title": {"bidi\u202etitle"}})
115	assert.Equal(t, http.StatusBadRequest, bad.status)
116	assert.NotContains(t, bad.body, "\u202e")
117
118	// The compare page now points at it.
119	assert.Contains(t, b.get("/proj/compare/feat/search", as(token)).body, `href="/proj/merge-requests/1"`)
120	assert.NotContains(t, b.get("/proj/compare/feat/search", as(token)).body, `<form class="cform create"`)
121
122	// The list.
123	list = b.get("/proj/merge-requests", nil)
124	assert.Contains(t, list.body, `<a href="/proj/merge-requests/1">Add &lt;b&gt;search&lt;/b&gt;</a>`)
125	assert.Contains(t, list.body, "feat/search → main")
126	assert.Equal(t, "no-cache", list.hdr.Get("Cache-Control"))
127	assertNoInline(t, list.body)
128	assert.Equal(t, "private, no-store", b.get("/proj/merge-requests", as(token)).hdr.Get("Cache-Control"))
129
130	// The page, anonymous: read-only.
131	mr := b.get("/proj/merge-requests/1", nil)
132	require.Equal(t, 200, mr.status, mr.body)
133	assert.Equal(t, "no-cache", mr.hdr.Get("Cache-Control"))
134	assert.Equal(t, []string{"Accept-Encoding"}, mr.hdr.Values("Vary"))
135	assert.Contains(t, mr.body, "<h1><span class=\"mute\">#1</span> Add &lt;b&gt;search&lt;/b&gt;</h1>")
136	assert.NotContains(t, mr.body, "<b>search</b>")
137	assert.Contains(t, mr.body, "feat/search")
138	assert.Contains(t, mr.body, `<span class="kn">package</span> search</td>`)
139	assert.Contains(t, mr.body, "no checks")
140	assert.Contains(t, mr.body, "fast-forward, squash")
141	// The description is Markdown, rendered as a README: no raw HTML, no
142	// script URL; its heading ids keep apart from the ids of the page.
143	assert.Contains(t, mr.body, `<article class="mr-desc prose" aria-label="description" hx-ignore>`)
144	assert.Contains(t, mr.body, `<h2 id="mr-desc-summary">Summary</h2>`)
145	assert.Contains(t, mr.body, `<strong>things</strong>`)
146	assert.Contains(t, mr.body, `<code>Find()</code>`)
147	assert.Contains(t, mr.body, `<a href="https://example.org/spec"`, "a bare address is linked")
148	assert.NotContains(t, mr.body, `href="javascript:`)
149	assert.NotContains(t, mr.body, `<script>alert(1)</script>`)
150	assert.NotContains(t, mr.body, "<form", "an anonymous visitor gets no form")
151	assert.NotContains(t, mr.body, "ermite mr merge", "nor the merge line")
152	assert.NotContains(t, mr.body, `id="merge-menu"`)
153	assert.Contains(t, mr.body, `href="/proj/commit/`+head+`"`, "the commits are in the rail")
154	assert.NotContains(t, strings.ToLower(mr.body), "proposal")
155	assertNoInline(t, mr.body)
156	assert.Equal(t, 404, b.get("/proj/merge-requests/1/since", nil).status, "the read position is the owner's")
157	assert.Equal(t, 404, b.get("/proj/merge-requests/9", nil).status)
158	assert.Equal(t, 404, b.get("/proj/merge-requests/01", nil).status)
159	assert.Equal(t, 404, b.get("/proj/merge-requests/x", nil).status)
160
161	// Signed in: forms, the merge box with the head and the CLI lines.
162	own := b.get("/proj/merge-requests/1", as(token))
163	require.Equal(t, 200, own.status)
164	assert.Equal(t, "private, no-store", own.hdr.Get("Cache-Control"))
165	assert.Contains(t, own.hdr.Values("Vary"), "Cookie")
166	assert.Equal(t, head, formHead(t, own.body))
167	assert.Contains(t, own.body, `action="/proj/merge-requests/1/merge"`)
168	assert.Contains(t, own.body, `id="merge-menu"`, "the merge is a menu of the bar above the diff")
169	assert.Contains(t, own.body, `name="mode" value="fast-forward" checked`, "the first possible mode is the default")
170	assert.Contains(t, own.body, `name="mode" value="squash"`)
171	assert.Contains(t, own.body, `name="mode" value="merge"`, "every mode is allowed by default")
172	assert.Contains(t, own.body, "ermite mr merge proj 1 --head "+head)
173	assert.Contains(t, own.body, `name="delete_branch" value="1"> delete feat/search after the merge <kbd aria-hidden="true">D</kbd>`)
174	assert.NotContains(t, own.body, `name="delete_branch" value="1" checked>`, "unchecked by default")
175	assert.Contains(t, own.body, "ermite mr merge proj 1 --head "+head+" --mode squash")
176	assert.Contains(t, own.body, "ermite mr merge proj 1 --head "+head+" --mode merge")
177	assert.NotContains(t, own.body, "--squash")
178	assert.Contains(t, own.body, `action="/proj/merge-requests/1/comments"`)
179	assert.Contains(t, own.body, `action="/proj/merge-requests/1/close"`)
180	assert.Contains(t, own.body, `href="/proj/merge-requests/1?on=new:1:search.go#f`, "line numbers link to their form")
181	assertNoInline(t, own.body)
182
183	// Reading is safe: GET marked nothing as read.
184	assert.NotContains(t, own.body, "since your last read")
185	show := r.cli(t, adminToken, "mr", "show", "proj", "1", "--json").ok(t)
186	assert.Contains(t, show.stdout, `"last_read_id": ""`)
187}
188
189// A private repository is invisible to the anonymous visitor on every merge
190// request page, and the owner sees it.
191func TestWebMergeRequestPrivate(t *testing.T) {
192	r := newMRRepo(t, domain.VisibilityPrivate)
193	b := browser{r.harness}
194	token := r.signIn(t)
195	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "Secret plan").ok(t)
196
197	missing := b.get("/nothere/merge-requests/1", nil)
198	for _, p := range []string{
199		"/proj/merge-requests", "/proj/merge-requests/1", "/proj/merge-requests/1/since", "/proj/compare/feat/search",
200	} {
201		got := b.get(p, nil)
202		assert.Equal(t, 404, got.status, p)
203		assert.NotContains(t, got.body, "Secret plan", p)
204		assert.NotContains(t, got.body, "search.go", p)
205	}
206	assert.Equal(t, missing.body, b.get("/proj/merge-requests/1", nil).body, "same page as a missing repository")
207	assert.Equal(t, 404, b.get("/-/events?topic=repo:proj&view=mrs", nil).status)
208
209	for _, p := range []string{"/proj/merge-requests", "/proj/merge-requests/1", "/proj/merge-requests/1/since", "/proj/compare/feat/search"} {
210		got := b.get(p, as(token))
211		assert.Equal(t, 200, got.status, p)
212		assert.Equal(t, "private, no-store", got.hdr.Get("Cache-Control"), p)
213		assert.Contains(t, got.hdr.Values("Vary"), "Cookie", p)
214	}
215	assert.Contains(t, b.get("/proj/merge-requests", as(token)).body, "Secret plan")
216}
217
218// AC2: every write needs the session and an Origin of this site.
219func TestWebMergeRequestWritesNeedSessionAndOrigin(t *testing.T) {
220	r := newMRRepo(t, domain.VisibilityPublic)
221	b := browser{r.harness}
222	token := r.signIn(t)
223	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "t").ok(t)
224	head := r.headOf("feat/search")
225
226	paths := map[string]string{
227		"/proj/merge-requests":                      "source=feat/search&target=main&title=x",
228		"/proj/merge-requests/1/comments":           "text=hello",
229		"/proj/merge-requests/1/comments/1/resolve": "resolved=true",
230		"/proj/merge-requests/1/merge":              "mode=fast-forward&head_id=" + head,
231		"/proj/merge-requests/1/close":              "",
232		"/proj/merge-requests/1/read":               "head_id=" + head,
233		"/proj/merge-requests/1/ready":              "",
234	}
235	for path, body := range paths {
236		noOrigin := b.do("POST", path, as(token), body)
237		assert.Equal(t, 403, noOrigin.status, path+" without Origin")
238		assert.Equal(t, "no-store", noOrigin.hdr.Get("Cache-Control"))
239		foreign := b.do("POST", path, map[string]string{"Cookie": sessionCookie + "=" + token, "Origin": "https://evil.example"}, body)
240		assert.Equal(t, 403, foreign.status, path+" foreign Origin")
241		anon := b.do("POST", path, map[string]string{"Origin": publicOrigin}, body)
242		assert.Equal(t, 403, anon.status, path+" without a session")
243	}
244	// Nothing happened.
245	out := r.cli(t, "", "mr", "show", "proj", "1", "--json").ok(t).stdout
246	assert.Contains(t, out, `"state": "open"`)
247	assert.NotContains(t, out, "hello")
248	assert.Equal(t, "", strings.TrimSpace(r.bareGit("proj", "rev-list", "main..feat/search", "--not", "feat/search")))
249
250	// A GET on a write route is not a page.
251	assert.Equal(t, 404, b.get("/proj/merge-requests/1/merge", as(token)).status)
252	assert.Equal(t, 404, b.get("/proj/merge-requests/1/close", as(token)).status)
253}
254
255var reNoteID = regexp.MustCompile(`id="c(\d+)"`)
256
257// The review of one request, in the browser's words: a note on a line, a
258// general one, resolve, since the last read after a push, a stale head, the
259// fast-forward merge.
260func TestWebMergeRequestReviewAndFastForward(t *testing.T) {
261	r := newMRRepo(t, domain.VisibilityPublic)
262	b := browser{r.harness}
263	token := r.signIn(t)
264	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "Add search").ok(t)
265	head1 := r.headOf("feat/search")
266	base := "/proj/merge-requests/1"
267
268	// The form of a line, then the note under that line.
269	line := b.get(base+"?on=new:3:search.go", as(token))
270	require.Equal(t, 200, line.status)
271	assert.Contains(t, line.body, `<form class="cform"`)
272	assert.Contains(t, line.body, `name="path" value="search.go"`)
273	assert.Contains(t, line.body, `name="line" value="3"`)
274	assert.Contains(t, line.body, `name="side" value="new"`)
275	assert.Contains(t, line.body, `comment on search.go:3 (new)`, "one line: the title names it")
276	assert.Contains(t, b.get(base+"?on=new:1-3:search.go", as(token)).body, `comment on search.go:1-3 (new)`, "a range: the title names all of it")
277	assert.Equal(t, 0, strings.Count(b.get(base+"?on=new:99:search.go", as(token)).body, `name="line" value="99"`), "a line the diff lacks has no form")
278	assert.Equal(t, 0, strings.Count(b.get(base+"?on=new:3:search.go", nil).body, `<form`), "nor for a visitor")
279
280	res := b.form(base+"/comments", token, url.Values{"text": {"Why <i>empty</i>?\r\nSee https://example.org/a."}, "path": {"search.go"}, "line": {"3"}, "side": {"new"}})
281	require.Equal(t, http.StatusSeeOther, res.status, res.body)
282	assert.Equal(t, base+"#c1", res.hdr.Get("Location"))
283	assert.Equal(t, "no-store", res.hdr.Get("Cache-Control"))
284	res = b.form(base+"/comments", token, url.Values{"text": {"Looks fine overall."}})
285	require.Equal(t, http.StatusSeeOther, res.status, res.body)
286	assert.Equal(t, base+"#c2", res.hdr.Get("Location"))
287
288	anon := b.get(base, nil)
289	i := strings.Index(anon.body, `<tr class="fnote">`)
290	require.GreaterOrEqual(t, i, 0, "a note row under the line")
291	note := anon.body[i:]
292	assert.Less(t, strings.Index(note, "Why &lt;i&gt;empty&lt;/i&gt;?"), strings.Index(note, "</tr>"), "the note sits in the row under its line")
293	assert.Contains(t, anon.body, `<a href="https://example.org/a" rel="nofollow noopener noreferrer">https://example.org/a</a>.`)
294	assert.NotContains(t, anon.body, "<i>empty</i>")
295	assert.Contains(t, anon.body, "Looks fine overall.")
296	assert.Equal(t, 2, len(reNoteID.FindAllString(anon.body, -1)))
297	assert.NotContains(t, anon.body, "[resolve]", "a visitor cannot resolve")
298
299	// A comment that breaks a rule is refused with the rule, nothing is lost.
300	bad := b.form(base+"/comments", token, url.Values{"text": {"ok"}, "path": {"search.go"}, "line": {"99"}, "side": {"new"}})
301	assert.Equal(t, http.StatusBadRequest, bad.status)
302	assert.Equal(t, "no-store", bad.hdr.Get("Cache-Control"))
303	assert.Contains(t, bad.body, "search.go")
304	bad = b.form(base+"/comments", token, url.Values{"text": {"x"}, "path": {"search.go"}, "line": {"zz"}, "side": {"new"}})
305	assert.Equal(t, http.StatusBadRequest, bad.status)
306	bad = b.form(base+"/comments", token, url.Values{"text": {"x"}, "path": {"search.go"}, "line": {"3"}, "side": {"sideways"}})
307	assert.Equal(t, http.StatusBadRequest, bad.status)
308	bad = b.form(base+"/comments", token, url.Values{"text": {"evil\u202etext"}})
309	assert.Equal(t, http.StatusBadRequest, bad.status)
310	assert.NotContains(t, bad.body, "\u202e")
311	assert.Equal(t, 404, b.form("/proj/merge-requests/9/comments", token, url.Values{"text": {"x"}}).status)
312
313	// Resolve and unresolve.
314	own := b.get(base, as(token))
315	assert.Contains(t, own.body, `action="/proj/merge-requests/1/comments/1/resolve"`)
316	res = b.form(base+"/comments/1/resolve", token, url.Values{"resolved": {"true"}})
317	require.Equal(t, http.StatusSeeOther, res.status, res.body)
318	assert.Equal(t, base+"#c1", res.hdr.Get("Location"))
319	own = b.get(base, as(token))
320	assert.Contains(t, own.body, `data-resolved="true"`)
321	assert.Contains(t, own.body, ">Unresolve</button>")
322	assert.Equal(t, http.StatusSeeOther, b.form(base+"/comments/1/resolve", token, url.Values{"resolved": {"false"}}).status)
323	assert.Equal(t, http.StatusBadRequest, b.form(base+"/comments/1/resolve", token, url.Values{"resolved": {"maybe"}}).status)
324	assert.Equal(t, 404, b.form(base+"/comments/42/resolve", token, url.Values{"resolved": {"true"}}).status)
325
326	// Mark read, then push: the since page shows the new change only.
327	assert.Contains(t, own.body, `action="/proj/merge-requests/1/read"`)
328	res = b.form(base+"/read", token, url.Values{"head_id": {head1}})
329	require.Equal(t, http.StatusSeeOther, res.status, res.body)
330	assert.NotContains(t, b.get(base, as(token)).body, "data-read>Mark read", "the head is the one that was read")
331	r.writeFile(r.wt, "extra.txt", []byte("extra\n"))
332	r.mustGit(r.wt, "push", "-q", r.url, "feat/search")
333	head2 := r.headOf("feat/search")
334
335	all := b.get(base, as(token))
336	assert.Contains(t, all.body, `href="/proj/merge-requests/1/since"`)
337	assert.Contains(t, all.body, "since your last read")
338	assert.Contains(t, all.body, "<li data-new>", "the commit pushed since is marked")
339	assert.Contains(t, all.body, "data-read>Mark read")
340	assert.Contains(t, all.body, "outdated", "the notes were written on the earlier head")
341	since := b.get(base+"/since", as(token))
342	require.Equal(t, 200, since.status, since.body)
343	assert.Equal(t, "private, no-store", since.hdr.Get("Cache-Control"))
344	assert.Contains(t, since.body, "changes since "+head1[:7])
345	assert.Contains(t, since.body, "extra</td>")
346	assert.NotContains(t, since.body, `<span class="kn">package</span> search</td>`, "only what changed after the read head")
347	assert.Contains(t, since.body, "empty", "the notes are listed below, their lines are not in this diff")
348	assert.NotContains(t, since.body, "<i>", "raw HTML is dropped")
349	assert.Contains(t, since.body, "search.go:3 (new)")
350	assert.NotContains(t, since.body, `<form class="cform"`, "no comment form on this diff")
351
352	// The merge form of the page the owner read carries that head: the push
353	// that came after is not merged unseen.
354	stale := b.form(base+"/merge", token, url.Values{"mode": {"fast-forward"}, "head_id": {head1}})
355	assert.Equal(t, http.StatusConflict, stale.status)
356	assert.Equal(t, "no-store", stale.hdr.Get("Cache-Control"))
357	assert.Contains(t, stale.body, "branch moved")
358	assert.NotEqual(t, head2, r.headOf("main"))
359	assert.Equal(t, http.StatusBadRequest, b.form(base+"/merge", token, url.Values{"mode": {"rebase"}, "head_id": {head2}}).status)
360	assert.Equal(t, http.StatusBadRequest, b.form(base+"/merge", token, url.Values{"mode": {"squash"}, "head_id": {"abc"}}).status)
361
362	// Fast-forward with the head that was read.
363	fresh := b.get(base, as(token))
364	require.Equal(t, head2, formHead(t, fresh.body))
365	res = b.form(base+"/merge", token, url.Values{"mode": {"fast-forward"}, "head_id": {formHead(t, fresh.body)}})
366	require.Equal(t, http.StatusSeeOther, res.status, res.body)
367	assert.Equal(t, base, res.hdr.Get("Location"))
368	assert.Equal(t, head2, r.headOf("main"), "the target moved to the head")
369
370	done := b.get(base, nil)
371	assert.Contains(t, done.body, "merged")
372	assert.Contains(t, done.body, "fast-forward")
373	assert.Contains(t, done.body, `href="/proj/commit/`+head2+`"`)
374	assert.NotContains(t, done.body, "<form")
375	assert.NotContains(t, b.get(base, as(token)).body, `id="merge-menu"`, "nothing to merge any more")
376	// Writes on a merged request are refused with a page.
377	late := b.form(base+"/comments", token, url.Values{"text": {"too late"}})
378	assert.Equal(t, http.StatusConflict, late.status)
379	assert.Equal(t, http.StatusConflict, b.form(base+"/close", token, nil).status)
380	list := b.get("/proj/merge-requests", nil)
381	assert.Contains(t, list.body, "Merged and closed")
382	assert.Regexp(t, `(?s)Merged and closed.*Add search`, list.body)
383}
384
385// Squash and close, and the order of the list: open first, then the decided.
386func TestWebMergeRequestSquashCloseAndList(t *testing.T) {
387	r := newMRRepo(t, domain.VisibilityPublic)
388	b := browser{r.harness}
389	token := r.signIn(t)
390	head := r.headOf("feat/search")
391	main0 := r.headOf("main")
392
393	// Open from compare with a description; the merge form squashes.
394	res := b.form("/proj/merge-requests", token, url.Values{
395		"source": {"feat/search"}, "target": {"main"}, "title": {"Squash me"}, "description": {""},
396	})
397	require.Equal(t, http.StatusSeeOther, res.status, res.body)
398	assert.Contains(t, b.get("/proj/merge-requests/1", as(token)).body, `name="delete_branch" value="1"`, "the box offers to delete the branch")
399	res = b.form("/proj/merge-requests/1/merge", token, url.Values{"mode": {"squash"}, "head_id": {head}, "delete_branch": {"1"}})
400	require.Equal(t, http.StatusSeeOther, res.status, res.body)
401	r.forge.MergeRequests.Wait(r.ctx) // the deletion follows the redirect
402	assert.Empty(t, r.bareGit("proj", "for-each-ref", "refs/heads/feat/search"), "the source branch is deleted")
403	merged := r.headOf("main")
404	assert.NotEqual(t, head, merged, "squash makes a new commit")
405	assert.Equal(t, main0, r.bareGit("proj", "rev-parse", "main^"), "on top of the old target")
406	assert.Contains(t, r.bareGit("proj", "cat-file", "-p", "main"), "gpgsig", "signed by the instance key")
407	page := b.get("/proj/merge-requests/1", nil)
408	assert.Contains(t, page.body, "squash")
409	assert.Contains(t, page.body, `href="/proj/commit/`+merged+`"`)
410
411	// A second request: closed.
412	r.mustGit(r.wt, "checkout", "-q", "-b", "feat/other", "main")
413	r.mustGit(r.wt, "pull", "-q", r.url, "main")
414	r.writeFile(r.wt, "other.go", []byte("package other\n"))
415	r.mustGit(r.wt, "push", "-q", r.url, "feat/other")
416	r.mustGit(r.wt, "checkout", "-q", "-b", "feat/third", "feat/other")
417	r.writeFile(r.wt, "third.go", []byte("package third\n"))
418	r.mustGit(r.wt, "push", "-q", r.url, "feat/third")
419	for _, title := range []struct{ src, title string }{{"feat/other", "Other change"}, {"feat/third", "Third change"}} {
420		res = b.form("/proj/merge-requests", token, url.Values{"source": {title.src}, "target": {"main"}, "title": {title.title}})
421		require.Equal(t, http.StatusSeeOther, res.status, res.body)
422	}
423	res = b.form("/proj/merge-requests/2/close", token, nil)
424	require.Equal(t, http.StatusSeeOther, res.status, res.body)
425	assert.Equal(t, "/proj/merge-requests/2", res.hdr.Get("Location"))
426	assert.Equal(t, "no-store", res.hdr.Get("Cache-Control"))
427	closed := b.get("/proj/merge-requests/2", nil)
428	assert.Contains(t, closed.body, `data-state="closed"`)
429	assert.NotContains(t, closed.body, "<form")
430	assert.Equal(t, http.StatusConflict, b.form("/proj/merge-requests/2/close", token, nil).status, "closing twice says so")
431
432	// Open one first, then merged and closed ones, newest first within each.
433	list := b.get("/proj/merge-requests", nil).body
434	third, squash, other := strings.Index(list, "Third change"), strings.Index(list, "Squash me"), strings.Index(list, "Other change")
435	require.True(t, third >= 0 && squash >= 0 && other >= 0, list)
436	assert.Less(t, third, squash, "the open request comes first")
437	assert.Less(t, third, other)
438	assert.Less(t, strings.Index(list, ">Open<"), strings.Index(list, "Merged and closed"))
439	assert.Less(t, other, squash, "newest first among the decided")
440
441	// A compare page of a branch that is behind says so.
442	r.mustGit(r.wt, "checkout", "-q", "-b", "feat/stale", main0)
443	r.writeFile(r.wt, "stale.go", []byte("package stale\n"))
444	r.mustGit(r.wt, "push", "-q", r.url, "feat/stale")
445	stale := b.get("/proj/compare/feat/stale", nil)
446	assert.Equal(t, 200, stale.status)
447	assert.Contains(t, stale.body, "has moved on")
448}
449
450// A "WIP:" request is a draft: the list and the page say so, the box offers
451// "Ready for review" instead of the merge form and the terminal lines, the
452// merge is refused; ready drops the prefix and the merge form comes back. The
453// tab counts the open requests.
454func TestWebMergeRequestDraft(t *testing.T) {
455	r := newMRRepo(t, domain.VisibilityPublic)
456	b := browser{r.harness}
457	token := r.signIn(t)
458	head := r.headOf("feat/search")
459	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "WIP: search").ok(t)
460
461	page := b.get("/proj/merge-requests/1", as(token)).body
462	assert.Contains(t, page, `data-state="draft"`)
463	assert.Contains(t, page, `action="/proj/merge-requests/1/ready"`)
464	assert.NotContains(t, page, `action="/proj/merge-requests/1/merge"`)
465	assert.NotContains(t, page, "ermite mr merge", "no terminal line for a draft")
466	assert.Contains(t, page, `<span class="count">1<span class="sr"> open</span></span>`, "the tab counts the open requests")
467	assert.Contains(t, b.get("/proj/merge-requests", nil).body, `data-state="draft"`)
468
469	res := b.form("/proj/merge-requests/1/merge", token, url.Values{"mode": {"fast-forward"}, "head_id": {head}})
470	assert.Equal(t, http.StatusConflict, res.status, "a draft is not merged")
471	assert.Contains(t, res.body, `data-canonical="/proj/merge-requests/1"`, "the refused page names its own address")
472	assert.Contains(t, res.body, `class="d-err"`, "the reason stays inline")
473	assert.NotContains(t, b.get("/proj/merge-requests/1", as(token)).body, "data-canonical", "the plain page has no marker")
474
475	res = b.form("/proj/merge-requests/1/ready", token, nil)
476	require.Equal(t, http.StatusSeeOther, res.status, res.body)
477	page = b.get("/proj/merge-requests/1", as(token)).body
478	assert.Contains(t, page, "> search</h1>", "the prefix is gone")
479	assert.Contains(t, page, `data-state="open"`)
480	assert.Contains(t, page, `action="/proj/merge-requests/1/merge"`)
481	assert.Contains(t, page, `<details class="d-or">`, "the terminal lines fold away")
482	assert.Equal(t, http.StatusConflict, b.form("/proj/merge-requests/1/ready", token, nil).status, "not a draft any more")
483}
484
485// A request opened with a token shows the owner's name, not the label of the
486// token, which names a device.
487func TestWebMergeRequestAuthorIsTheOwner(t *testing.T) {
488	r := newMRRepo(t, domain.VisibilityPublic)
489	out, errOut, code := r.bin(t, adminToken, "token", "create", "laptop", "--preset", "cli")
490	require.Equal(t, 0, code, errOut)
491	r.cli(t, strings.TrimSpace(out), "mr", "create", "proj", "--source", "feat/search", "--title", "search").ok(t)
492
493	b := browser{r.harness}
494	for _, path := range []string{"/proj/merge-requests/1", "/proj/merge-requests"} {
495		body := b.get(path, nil).body
496		assert.NotContains(t, body, "laptop", path)
497	}
498	assert.Contains(t, b.get("/proj/merge-requests", nil).body, `<td class="c-who dim">owner</td>`)
499}
500
501// The box offers no deletion for the default branch; a fast-forward with the
502// box checked deletes the source.
503func TestWebMergeDeleteBranchBox(t *testing.T) {
504	r := newMRRepo(t, domain.VisibilityPublic)
505	b := browser{r.harness}
506	token := r.signIn(t)
507	// old is an orphan branch: main can be proposed to it, and main stays an
508	// ancestor of feat/search so that it fast-forwards.
509	r.mustGit(r.wt, "checkout", "-q", "--orphan", "old")
510	r.writeFile(r.wt, "old.txt", []byte("old\n")) // commits
511	r.mustGit(r.wt, "push", "-q", r.url, "old")
512
513	for _, mr := range []url.Values{
514		{"source": {"feat/search"}, "target": {"main"}, "title": {"Search"}},
515		{"source": {"main"}, "target": {"old"}, "title": {"Back"}},
516	} {
517		require.Equal(t, http.StatusSeeOther, b.form("/proj/merge-requests", token, mr).status)
518	}
519	assert.NotContains(t, b.get("/proj/merge-requests/2", as(token)).body, `name="delete_branch"`, "never for the default branch")
520
521	one := b.get("/proj/merge-requests/1", as(token))
522	res := b.form("/proj/merge-requests/1/merge", token, url.Values{"mode": {"fast-forward"}, "head_id": {formHead(t, one.body)}, "delete_branch": {"1"}})
523	require.Equal(t, http.StatusSeeOther, res.status, res.body)
524	r.forge.MergeRequests.Wait(r.ctx) // the deletion follows the redirect
525	assert.Empty(t, r.bareGit("proj", "for-each-ref", "refs/heads/feat/search"))
526	done := b.get("/proj/merge-requests/1", nil)
527	assert.Equal(t, 200, done.status, "the merged page reads without its branch")
528	assert.NotContains(t, done.body, `href="/proj/tree/feat/search"`, "no link to a gone branch")
529}
530
531// The comment limit of the API is a message, not a crash.
532func TestWebMergeRequestLimitIsFriendly(t *testing.T) {
533	r := newMRRepo(t, domain.VisibilityPublic)
534	b := browser{r.harness}
535	token := r.signIn(t)
536	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "t").ok(t)
537	for i := 0; i < 1000; i++ {
538		_, err := r.forge.MergeRequests.AddComment(r.ctx, domain.Root(), r.name("proj"), 1, ports.AddCommentParams{Text: "n"})
539		require.NoError(t, err)
540	}
541	full := b.form("/proj/merge-requests/1/comments", token, url.Values{"text": {"one more"}})
542	assert.Equal(t, http.StatusConflict, full.status)
543	assert.Contains(t, full.body, "limit reached")
544	assert.Contains(t, full.body, "1000 comments")
545	assert.Equal(t, "no-store", full.hdr.Get("Cache-Control"))
546}
547
548// Text is escaped everywhere and invisible characters are shown as markers.
549func TestWebMergeRequestEscapesText(t *testing.T) {
550	r := newMRRepo(t, domain.VisibilityPublic)
551	b := browser{r.harness}
552	token := r.signIn(t)
553	res := b.form("/proj/merge-requests", token, url.Values{
554		"source": {"feat/search"}, "target": {"main"}, "title": {`"><script>alert(1)</script>`},
555		"description": {"<img src=x onerror=alert(1)>\nhttp://x.test/\"onmouseover=\"alert(1)"},
556	})
557	require.Equal(t, http.StatusSeeOther, res.status, res.body)
558	r.cli(t, adminToken, "mr", "comment", "proj", "1", "-m", "<script>x</script> & more").ok(t)
559	for _, tok := range []string{"", token} {
560		var h map[string]string
561		if tok != "" {
562			h = as(tok)
563		}
564		body := b.get("/proj/merge-requests/1", h).body
565		assert.NotContains(t, body, "<script>alert")
566		assert.NotContains(t, body, "<img src=x")
567		assert.NotContains(t, body, "<script>x</script>")
568		assert.Contains(t, html.UnescapeString(body), `"><script>alert(1)</script>`)
569		// A note is safe Markdown: a line that opens with an HTML tag is an HTML
570		// block, dropped whole.
571		assert.Contains(t, body, `class="c-body prose"><!-- raw HTML omitted -->`)
572		assertNoInline(t, body)
573		assert.NotContains(t, body, `onmouseover="alert`, "an address stops at a quote")
574	}
575}
576
577// The merge request pages learn of changes over the event stream: a fixed
578// sentence and a link, never the text of a comment or a title.
579func TestWebMergeRequestEvents(t *testing.T) {
580	r := newMRRepo(t, domain.VisibilityPublic)
581	list := r.sse("topic=repo:proj&view=mrs", "")
582	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "Secret <title>").ok(t)
583	ev := nextNamed(t, list, "mr-notice")
584	assert.Contains(t, ev.data, `<div id="mr-notice" class="live-slot" role="status" data-slot>`)
585	assert.Contains(t, ev.data, `href="/proj/merge-requests"`)
586	assert.NotContains(t, ev.data, "Secret")
587
588	one := r.sse("topic=repo:proj&view=mr&n=1&ref=feat/search", "")
589	other := r.sse("topic=repo:proj&view=mr&n=2&ref=feat/other", "")
590	r.cli(t, adminToken, "mr", "comment", "proj", "1", "-m", "private words").ok(t)
591	ev = nextNamed(t, one, "mr-notice")
592	assert.Contains(t, ev.data, "a comment was added")
593	assert.Contains(t, ev.data, `href="/proj/merge-requests/1"`)
594	assert.NotContains(t, ev.data, "private words")
595
596	r.writeFile(r.wt, "more.txt", []byte("more\n"))
597	r.mustGit(r.wt, "push", "-q", r.url, "feat/search")
598	ev = nextNamed(t, one, "mr-notice")
599	assert.Contains(t, ev.data, "the branch changed")
600
601	r.cli(t, adminToken, "mr", "close", "proj", "1").ok(t)
602	assert.Contains(t, nextNamed(t, one, "mr-notice").data, "was closed")
603
604	// A page of another request hears nothing of this one.
605	for drained := false; !drained; {
606		select {
607		case ev := <-other.events:
608			if !ev.comment && ev.name != "" {
609				t.Fatalf("unexpected event %+v", ev)
610			}
611		default:
612			drained = true
613		}
614	}
615	assert.Contains(t, r.get1("/proj/merge-requests/1"), `hx-sse:connect="/-/events?topic=repo%3Aproj&amp;view=mr&amp;n=1&amp;ref=feat%2Fsearch&amp;head=`+r.headOf("feat/search")+`&amp;target=main"`)
616}
617
618// nextNamed returns the next event that carries the fragment event: the
619// events that change nothing on the page (an id alone) are skipped.
620func nextNamed(t *testing.T, s *sseStream, name string) sseEvent {
621	t.Helper()
622	for range 10 {
623		if ev := s.next(t, watchWait); ev.name == name {
624			return ev
625		}
626	}
627	t.Fatalf("no %s event", name)
628	return sseEvent{}
629}
630
631func (r *mrRepo) get1(path string) string {
632	r.t.Helper()
633	_, _, body := r.get(path)
634	return body
635}
636
637// A rewritten branch that dropped the commit the owner read says so, and shows
638// the whole change.
639func TestWebMergeRequestSinceAfterForcePush(t *testing.T) {
640	r := newMRRepo(t, domain.VisibilityPublic)
641	b := browser{r.harness}
642	token := r.signIn(t)
643	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "t").ok(t)
644	base := "/proj/merge-requests/1"
645
646	nothing := b.get(base+"/since", as(token))
647	assert.Equal(t, 200, nothing.status)
648	assert.Contains(t, nothing.body, "nothing was marked read yet")
649
650	head1 := r.headOf("feat/search")
651	require.Equal(t, http.StatusSeeOther, b.form(base+"/read", token, url.Values{"head_id": {head1}}).status)
652	assert.Equal(t, http.StatusBadRequest, b.form(base+"/read", token, url.Values{"head_id": {strings.Repeat("0", 40)}}).status, "not a commit of the repository")
653	r.mustGit(r.wt, "reset", "-q", "--hard", "main")
654	r.writeFile(r.wt, "other.txt", []byte("o\n"))
655	r.mustGit(r.wt, "push", "-q", "--force", r.url, "feat/search")
656	// Push refreshes the pull refs asynchronously. Reconcile them synchronously
657	// before GC, or the old pull head/merge can still retain the read commit.
658	require.NoError(t, r.forge.CI.RescanPulls(r.ctx, r.name("proj")))
659	require.NotContains(t, strings.Fields(r.bareGit("proj", "rev-list", "--all")), head1)
660	r.bareGit("proj", "reflog", "expire", "--expire=now", "--all")
661	r.bareGit("proj", "gc", "-q", "--prune=now")
662
663	lost := b.get(base+"/since", as(token))
664	require.Equal(t, 200, lost.status)
665	assert.Contains(t, lost.body, "is gone, the branch was rewritten")
666	assert.Contains(t, lost.body, "other.txt", "the whole change is shown")
667}
668
669// A request of many files: the page lists every file and holds the hunks of
670// the first window only; the other files are placeholders that load their
671// window from /files, which carries the base and the head of the diff. A
672// comment on a far file comes with its window; a moved head answers 409; the
673// page of a window (?from=, the links of a page without scripts) shows its
674// hunks and its line forms.
675func TestWebMergeRequestFileWindows(t *testing.T) {
676	r := newMRRepo(t, domain.VisibilityPublic)
677	b := browser{r.harness}
678	token := r.signIn(t)
679	const n = 60
680	for i := range n {
681		r.writeFile(r.wt, fmt.Sprintf("many/f%02d.txt", i), []byte(fmt.Sprintf("line %d\n", i)))
682	}
683	r.mustGit(r.wt, "push", "-q", r.url, "feat/search")
684	head := r.headOf("feat/search")
685	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "Many").ok(t)
686	r.cli(t, adminToken, "mr", "comment", "proj", "1", "--path", "many/f55.txt", "--line", "1", "-m", "far note").ok(t)
687
688	page := b.get("/proj/merge-requests/1", nil)
689	require.Equal(t, 200, page.status)
690	assert.Equal(t, n+1, strings.Count(page.body, `<li><a href="#f`), "every file is listed")
691	assert.Equal(t, n+1-25, strings.Count(page.body, `class="dlazy`), "the files past the first window are placeholders")
692	assert.NotContains(t, page.body, "far note", "the comment of a far file comes with its window")
693	assert.Contains(t, page.body, `data-notes="c1"`, "its placeholder knows it")
694	assert.Contains(t, page.body, `<span class="cn" title="1 open comment">1</span>`, "the list counts it")
695	m := reWindowSrc.FindStringSubmatch(page.body)
696	require.Len(t, m, 2, "a placeholder holds the address of its window")
697	src := html.UnescapeString(m[1])
698	assert.Contains(t, src, "head="+head)
699
700	win := b.get(strings.Replace(src, "from=25", "from=50", 1), nil)
701	require.Equal(t, 200, win.status, win.body)
702	assert.Contains(t, win.body, "far note")
703	assert.Contains(t, win.body, `line 55</td>`)
704	assert.NotContains(t, win.body, "<html", "a window is a fragment")
705	assert.NotContains(t, win.body, `class="dlazy`)
706	// The window renders the layouts of the page: both when it switches them,
707	// the one it shows otherwise.
708	both := b.get(src+"&view=split&layouts=both", nil)
709	assert.Contains(t, both.body, `class="dt uni"`)
710	assert.Contains(t, both.body, `class="dt spl"`)
711	one := b.get(src+"&view=split&layouts=one", nil)
712	assert.NotContains(t, one.body, `class="dt uni"`)
713	assert.Contains(t, one.body, `class="dt spl"`)
714	assert.Equal(t, 404, b.get(strings.Replace(src, "from=25", "from=7", 1), nil).status, "not a window start")
715	assert.Equal(t, 404, b.get(strings.Replace(src, "from=25", "from=100", 1), nil).status, "past the files")
716
717	// The page of a window, without scripts: its hunks, the line forms of the
718	// owner point back to it.
719	own := b.get("/proj/merge-requests/1?from=50", as(token))
720	require.Equal(t, 200, own.status)
721	assert.Contains(t, own.body, "line 55</td>")
722	assert.Contains(t, own.body, `href="/proj/merge-requests/1?from=50&amp;on=new:1:many%2Ff55.txt#f`)
723	assert.NotContains(t, own.body, "line 0</td>", "the first window is a placeholder there")
724	assert.Contains(t, own.body, `href="/proj/merge-requests/1?view=split&amp;from=50"`, "the layout links keep the window")
725	assert.Equal(t, 404, b.get("/proj/merge-requests/1?from=3", nil).status)
726
727	// A comment on a line of a far window: its form, its cancel link and the
728	// answer return to that window.
729	form := b.get("/proj/merge-requests/1?from=50&on=new:1:many%2Ff55.txt", as(token))
730	require.Equal(t, 200, form.status)
731	assert.Contains(t, form.body, `name="from" value="50"`)
732	assert.Contains(t, form.body, `class="btn" href="/proj/merge-requests/1?from=50#f`)
733	res := b.form("/proj/merge-requests/1/comments", token, url.Values{"text": {"near it"}, "path": {"many/f55.txt"}, "line": {"1"}, "side": {"new"}, "from": {"50"}})
734	require.Equal(t, http.StatusSeeOther, res.status, res.body)
735	assert.Equal(t, "/proj/merge-requests/1?from=50#c2", res.hdr.Get("Location"))
736	assert.Contains(t, b.get("/proj/merge-requests/1?from=50", as(token)).body, `<input type="hidden" name="from" value="50">`, "its resolve form too")
737	res = b.form("/proj/merge-requests/1/comments/2/resolve", token, url.Values{"resolved": {"true"}, "from": {"50"}})
738	assert.Equal(t, "/proj/merge-requests/1?from=50#c2", res.hdr.Get("Location"))
739	res = b.form("/proj/merge-requests/1/comments/2/resolve", token, url.Values{"resolved": {"false"}, "from": {"7"}})
740	assert.Equal(t, "/proj/merge-requests/1#c2", res.hdr.Get("Location"), "a window that is none is dropped")
741
742	// The head moved: the window says to reload, never a file of another diff.
743	r.writeFile(r.wt, "later.txt", []byte("later\n"))
744	r.mustGit(r.wt, "push", "-q", r.url, "feat/search")
745	stale := b.get(src, nil)
746	assert.Equal(t, http.StatusConflict, stale.status)
747	assert.Contains(t, stale.body, "data-moved")
748}
749
750var reWindowSrc = regexp.MustCompile(`data-src="([^"]*from=25[^"]*)"`)
751
752// advanceMain pushes a commit to main that the feature branch lacks. file is
753// the file it adds (give search.go to conflict with the feature branch).
754func (r *mrRepo) advanceMain(file, content string) {
755	r.t.Helper()
756	r.mustGit(r.wt, "checkout", "-q", "main")
757	r.writeFile(r.wt, file, []byte(content))
758	r.mustGit(r.wt, "push", "-q", r.url, "main")
759	r.mustGit(r.wt, "checkout", "-q", "feat/search")
760}
761
762// mrPageWith polls the owner's page of !1 until it contains want.
763func (r *mrRepo) mrPageWith(token, want string) string {
764	r.t.Helper()
765	var body string
766	require.Eventually(r.t, func() bool {
767		body = browser{r.harness}.get("/proj/merge-requests/1", as(token)).body
768		return strings.Contains(body, want)
769	}, 10*time.Second, 25*time.Millisecond, "the page never showed %q", want)
770	return body
771}
772
773// The merge box shows the mergeability of the request: ready, then behind
774// (fast-forward is disabled with its reason, the other modes are not), then
775// in conflict (no mode is possible and the button says why).
776func TestWebMergeRequestMergeabilityBadge(t *testing.T) {
777	r := newMRRepo(t, domain.VisibilityPublic)
778	token := r.signIn(t)
779	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "Add search").ok(t)
780
781	body := r.mrPageWith(token, "Ready to merge")
782	assert.Contains(t, body, `<div id="mr-mergeability" class="live-slot" role="status" data-slot>`)
783	assert.Contains(t, body, `data-state="up_to_date"`)
784	assert.Contains(t, body, `name="mode" value="fast-forward" checked`)
785	assert.NotContains(t, body, `value="fast-forward" checked disabled`)
786	assert.Contains(t, body, `id="mr-signing"`, "squash and merge commits say who signs them")
787	assert.Contains(t, body, "signed with ermite's own key (generated on first start)")
788	assert.Contains(t, body, "<code>ermite signing-key show</code>")
789	assert.Contains(t, body, "SHA256:", "the fingerprint of the signing key")
790	assert.Contains(t, body, `:disabled="`, "the controls follow the badge")
791	assertNoInline(t, body)
792
793	// Main moves on: the branch is behind by one commit and merges cleanly.
794	r.advanceMain("other.txt", "other\n")
795	body = r.mrPageWith(token, "Behind main by 1 commit")
796	assert.Contains(t, body, "merges without conflicts")
797	assert.Contains(t, body, `data-ff-ok="false"`)
798	assert.Contains(t, body, `data-merge-ok="true"`)
799	assert.Regexp(t, `<input type="radio" name="mode" value="fast-forward"[^>]* disabled`, body)
800	assert.Contains(t, body, `title="behind the target: rebase or use squash/merge"`)
801	assert.Regexp(t, `name="mode" value="squash" checked`, body, "the first possible mode is checked")
802	assert.NotRegexp(t, `name="mode" value="squash"[^>]* disabled`, body)
803
804	// A conflicting change to main: every mode is disabled and the files are listed.
805	r.mustGit(r.wt, "checkout", "-q", "main")
806	r.writeFile(r.wt, "search.go", []byte("package other\n"))
807	r.mustGit(r.wt, "push", "-q", r.url, "main")
808	body = r.mrPageWith(token, "Conflicts with main")
809	assert.Contains(t, body, "rebase needed")
810	assert.Contains(t, body, `<ul class="mg-paths" aria-label="conflicting files"><li><code>search.go</code></li></ul>`)
811	assert.Regexp(t, `<button type="submit" class="btn primary" data-default disabled title="conflicts with the target"`, body)
812	assert.NotContains(t, body, `name="mode" value="squash" checked`)
813
814	// The server refuses it too, and says so in the box of the page.
815	res := browser{r.harness}.form("/proj/merge-requests/1/merge", token, url.Values{"mode": {"squash"}, "head_id": {formHead(t, body)}})
816	assert.Equal(t, http.StatusConflict, res.status)
817	assert.Contains(t, res.body, `<p class="d-err" role="alert">`)
818	assert.Contains(t, res.body, "conflicts with main")
819}
820
821// A merge the server refuses (the target moved after the page was read) shows
822// the page of the request again, 409, with the reason in its merge box.
823func TestWebMergeRequestInlineMergeError(t *testing.T) {
824	r := newMRRepo(t, domain.VisibilityPublic)
825	b := browser{r.harness}
826	token := r.signIn(t)
827	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "Add search").ok(t)
828	body := r.mrPageWith(token, "Ready to merge")
829	head := formHead(t, body)
830
831	r.advanceMain("other.txt", "other\n") // raced: the form below still says fast-forward
832	res := b.form("/proj/merge-requests/1/merge", token, url.Values{"mode": {"fast-forward"}, "head_id": {head}})
833	assert.Equal(t, http.StatusConflict, res.status)
834	assert.Equal(t, "no-store", res.hdr.Get("Cache-Control"))
835	assert.Contains(t, res.body, `id="merge-menu"`, "the page of the request, not a state page")
836	assert.Contains(t, res.body, `<p class="d-err" role="alert">`)
837	assert.Contains(t, res.body, "the target has moved")
838	assert.Contains(t, res.body, `<details class="menu mmenu" id="merge-menu" data-state="open" open>`, "the box is open on the error")
839	assert.Equal(t, head, r.headOf("feat/search"))
840	assert.NotContains(t, b.get("/proj/merge-requests/1", as(token)).body, "d-err", "a reload shows no error")
841
842	// A head that moved is refused the same way.
843	r.writeFile(r.wt, "more.txt", []byte("more\n"))
844	r.mustGit(r.wt, "push", "-q", r.url, "feat/search")
845	res = b.form("/proj/merge-requests/1/merge", token, url.Values{"mode": {"squash"}, "head_id": {head}})
846	assert.Equal(t, http.StatusConflict, res.status)
847	assert.Contains(t, res.body, `<p class="d-err" role="alert">`)
848	assert.Contains(t, res.body, "branch moved")
849
850	// Other refusals keep the state page; a mode that does not exist is a 400.
851	assert.Equal(t, http.StatusBadRequest, b.form("/proj/merge-requests/1/merge", token, url.Values{"mode": {"rebase"}, "head_id": {head}}).status)
852}
853
854// A merge commit through the page; with the branch deletion requested the
855// merged page says the branch is being deleted, not that it is gone.
856func TestWebMergeRequestMergeCommitAndDeletingNote(t *testing.T) {
857	r := newMRRepo(t, domain.VisibilityPublic)
858	b := browser{r.harness}
859	token := r.signIn(t)
860	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "Add search").ok(t)
861	r.advanceMain("other.txt", "other\n")
862	body := r.mrPageWith(token, "Behind main by 1 commit")
863	head := formHead(t, body)
864	main0 := r.headOf("main")
865
866	res := b.form("/proj/merge-requests/1/merge", token, url.Values{"mode": {"merge"}, "head_id": {head}, "delete_branch": {"1"}})
867	require.Equal(t, http.StatusSeeOther, res.status, res.body)
868	assert.Equal(t, "/proj/merge-requests/1?deleting=1", res.hdr.Get("Location"))
869	merged := r.headOf("main")
870	assert.Equal(t, main0, r.bareGit("proj", "rev-parse", merged+"^1"))
871	assert.Equal(t, head, r.bareGit("proj", "rev-parse", merged+"^2"))
872	assert.Contains(t, r.bareGit("proj", "cat-file", "-p", merged), "gpgsig")
873	page := b.get("/proj/merge-requests/1?deleting=1", as(token))
874	assert.Contains(t, page.body, "merge commit")
875	if strings.Contains(page.body, "is being deleted") {
876		assert.Contains(t, page.body, "feat/search is being deleted")
877	}
878	assert.NotContains(t, page.body, "is deleted")
879	r.forge.MergeRequests.Wait(r.ctx)
880	assert.Empty(t, r.bareGit("proj", "for-each-ref", "refs/heads/feat/search"))
881	assert.NotContains(t, b.get("/proj/merge-requests/1?deleting=1", as(token)).body, "is being deleted", "once gone, nothing is being deleted")
882}
883
884// The badge follows the request live: a push to the target turns the fragment
885// of the page to "checking" or "behind", and the settled result follows.
886func TestWebMergeRequestMergeabilityLive(t *testing.T) {
887	r := newMRRepo(t, domain.VisibilityPublic)
888	token := r.signIn(t)
889	r.cli(t, adminToken, "mr", "create", "proj", "--source", "feat/search", "--title", "Add search").ok(t)
890	r.mrPageWith(token, "Ready to merge")
891
892	one := r.sseAs("topic=repo:proj&view=mr&n=1&ref=feat/search&target=main", "", as(token))
893	anon := r.sse("topic=repo:proj&view=mr&n=1&ref=feat/search&target=main", "")
894	r.advanceMain("other.txt", "other\n")
895	deadline := time.After(watchWait)
896	for done := false; !done; {
897		ev := nextNamed(t, one, "mr-mergeability")
898		select {
899		case <-deadline:
900			t.Fatal("the badge never showed the result")
901		default:
902		}
903		if strings.Contains(ev.data, "Behind main by 1 commit") {
904			assert.Contains(t, ev.data, `<div id="mr-mergeability" class="live-slot" role="status" data-slot>`)
905			assert.Contains(t, ev.data, `data-ff-ok="false"`)
906			assert.Contains(t, ev.data, `data-merge-ok="true"`)
907			done = true
908		} else {
909			assert.Contains(t, ev.data, "Checking…", "before the result, the badge says it checks")
910		}
911	}
912	// The box is the owner's: a visitor's stream carries no badge.
913	for {
914		select {
915		case ev := <-anon.events:
916			assert.NotEqual(t, "mr-mergeability", ev.name)
917			continue
918		default:
919		}
920		break
921	}
922}

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