webview_zoom_test.go RawHistoryFolder

1package cef
2
3import (
4	"fmt"
5	"testing"
6
7	"github.com/stretchr/testify/assert"
8)
9
10func TestZoomConversionsRoundTrip(t *testing.T) {
11	factors := []float64{0.5, 0.8, 1.0, 1.1, 1.2, 1.4, 2.0}
12	for _, factor := range factors {
13		t.Run(fmt.Sprintf("factor_%.1f", factor), func(t *testing.T) {
14			level := cefZoomFromFactor(factor)
15			got := factorFromCEFZoom(level)
16			assert.InDelta(t, factor, got, 1e-9, "round-trip mismatch for factor %.6f: level %.6f -> factor %.12f", factor, level, got)
17		})
18	}
19}
20
21func TestZoomConversionsCompensateOSRBackingScale(t *testing.T) {
22	for _, backing := range []float64{1.0, 1.25, 1.5, 2.0} {
23		for _, pageZoom := range []float64{1.0, 1.75} {
24			t.Run(fmt.Sprintf("backing_%.2f_page_%.2f", backing, pageZoom), func(t *testing.T) {
25				level := cefZoomFromPageAndBackingFactor(pageZoom, backing)
26				assert.InDelta(t, pageZoom/backing, factorFromCEFZoom(level), 1e-9)
27				assert.InDelta(t, pageZoom, pageZoomFromCEFAndBackingLevel(level, backing), 1e-9)
28			})
29		}
30	}
31}