alloc_test.go RawHistoryFolder

1package wlturbo
2
3import "testing"
4
5// The README promises allocation-free numeric paths. Pin both halves: a typed
6// numeric request and the dispatch of a numeric event to a proxy.
7func TestNumericPathsDoNotAllocate(t *testing.T) {
8	t.Run("RequestArgs", func(t *testing.T) {
9		d := newDisplay(&chunkConn{})
10		p := &BaseProxy{id: d.AllocateID(), context: d.context}
11		d.context.Register(p)
12		req := Request{Proxy: p, Opcode: 1, Name: "test.numeric"}
13		send := func() {
14			if err := d.context.RequestArgs(req, ArgUint(1), ArgInt(-2), ArgFixed(3)); err != nil {
15				t.Fatal(err)
16			}
17		}
18		send() // warm up buffers
19		if n := testing.AllocsPerRun(100, send); n != 0 {
20			t.Fatalf("RequestArgs allocated %v times per call, want 0", n)
21		}
22	})
23
24	t.Run("DispatchEvent", func(t *testing.T) {
25		d := newDisplay(&chunkConn{})
26		p := &benchProxy{BaseProxy: BaseProxy{id: 7, context: d.context}}
27		d.context.Register(p)
28		f := receivedFrame{object: 7, opcode: 0, body: []byte{42, 0, 0, 0}}
29		dispatch := func() {
30			if err := d.dispatchFrame(f); err != nil {
31				t.Fatal(err)
32			}
33		}
34		dispatch() // warm up eventPool
35		if n := testing.AllocsPerRun(100, dispatch); n != 0 {
36			t.Fatalf("numeric event dispatch allocated %v times per call, want 0", n)
37		}
38		if p.value != 42 {
39			t.Fatalf("proxy received %d, want 42", p.value)
40		}
41	})
42
43	// A frame callback registers and retires one object per frame under a
44	// recycled ID; the object tables must reuse their storage.
45	t.Run("RegisterRecycledID", func(t *testing.T) {
46		d := newDisplay(&chunkConn{})
47		p := &BaseProxy{id: d.AllocateID(), context: d.context}
48		cycle := func() {
49			d.context.Register(p)
50			d.context.Unregister(p)
51		}
52		cycle()
53		if n := testing.AllocsPerRun(100, cycle); n != 0 {
54			t.Fatalf("register/unregister allocated %v times per cycle, want 0", n)
55		}
56	})
57}