theme: add WCAG data

core/internal/themes/registry_test.go

@@ -0,0 +1,66 @@
+package themes
+
+import (
+	"testing"
+
+	"github.com/spf13/afero"
+)
+
+func TestLoadThemeWCAG(t *testing.T) {
+	fs := afero.NewMemMapFs()
+	themeDir := "/themes/example"
+	wcagJSON := `{
+		"level": "AA",
+		"dark": {
+			"level": "AAA", "minRatio": 8.5, "worstPair": ["surfaceText", "surface"],
+			"body": {"level": "AAA", "minRatio": 8.5},
+			"accent": {"level": "AAA", "minRatio": 9.1}
+		},
+		"light": {
+			"level": "AA", "minRatio": 5.2,
+			"body": {"level": "AAA", "minRatio": 7.4},
+			"accent": {"level": "AA", "minRatio": 5.2},
+			"variants": {"blue": "AA", "red": "fail"}
+		}
+	}`
+	if err := afero.WriteFile(fs, themeDir+"/wcag.json", []byte(wcagJSON), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	wcag := loadThemeWCAG(fs, themeDir)
+	if wcag == nil {
+		t.Fatal("expected wcag report, got nil")
+	}
+	if wcag.Level != "AA" {
+		t.Fatalf("expected level AA, got %s", wcag.Level)
+	}
+	if wcag.Dark.Level != "AAA" || wcag.Dark.MinRatio != 8.5 {
+		t.Fatalf("unexpected dark mode report: %+v", wcag.Dark)
+	}
+	if wcag.Light.Variants["red"] != "fail" {
+		t.Fatalf("unexpected light variants: %+v", wcag.Light.Variants)
+	}
+	if wcag.Light.Body == nil || wcag.Light.Body.Level != "AAA" {
+		t.Fatalf("expected light body AAA, got %+v", wcag.Light.Body)
+	}
+	if wcag.Light.Accent == nil || wcag.Light.Accent.Level != "AA" {
+		t.Fatalf("expected light accent AA, got %+v", wcag.Light.Accent)
+	}
+}
+
+func TestLoadThemeWCAGMissingFile(t *testing.T) {
+	if wcag := loadThemeWCAG(afero.NewMemMapFs(), "/themes/none"); wcag != nil {
+		t.Fatalf("expected nil for missing wcag.json, got %+v", wcag)
+	}
+}
+
+func TestLoadThemeWCAGInvalidJSON(t *testing.T) {
+	fs := afero.NewMemMapFs()
+	if err := afero.WriteFile(fs, "/themes/bad/wcag.json", []byte("{"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	if wcag := loadThemeWCAG(fs, "/themes/bad"); wcag != nil {
+		t.Fatalf("expected nil for invalid wcag.json, got %+v", wcag)
+	}
+}