feat(theming): add theme discovery with gruvbox assets

internal/theming/theming_test.go

@@ -0,0 +1,42 @@
+package theming
+
+import (
+	"testing"
+)
+
+func TestListDiscoversThemes(t *testing.T) {
+	themes := List()
+	if len(themes) == 0 {
+		t.Fatal("no themes discovered")
+	}
+	for _, th := range themes {
+		if th.ID == "" || th.DisplayName == "" || th.NvChadTheme == "" {
+			t.Errorf("incomplete theme: %+v", th)
+		}
+	}
+}
+
+func TestGetKnownThemeReturnsMatch(t *testing.T) {
+	got, ok := Get("gruvbox")
+	if !ok {
+		t.Fatal("gruvbox should exist")
+	}
+	if got.ID != "gruvbox" || got.DisplayName == "" || got.NvChadTheme != "gruvbox" {
+		t.Fatalf("got %+v", got)
+	}
+}
+
+func TestGetUnknownThemeReturnsFalse(t *testing.T) {
+	if _, ok := Get("does-not-exist"); ok {
+		t.Fatal("bogus id should return ok=false")
+	}
+}
+
+func TestListIsSortedByID(t *testing.T) {
+	themes := List()
+	for i := 1; i < len(themes); i++ {
+		if themes[i].ID < themes[i-1].ID {
+			t.Fatalf("not sorted: %s before %s", themes[i-1].ID, themes[i].ID)
+		}
+	}
+}