feat(themes): implement PlanForce

internal/modules/themes/themes_test.go

@@ -63,4 +63,49 @@ func applyOnce(t *testing.T, m Module) error {
 	return m.Apply(context.Background(), p, nop{})
 }
 
+func TestPlanForceRewritesAllThemes(t *testing.T) {
+	src := t.TempDir()
+	os.WriteFile(filepath.Join(src, "one.toml"), []byte("FRESH-A"), 0o644)
+	os.MkdirAll(filepath.Join(src, "sub"), 0o755)
+	os.WriteFile(filepath.Join(src, "sub", "two.toml"), []byte("FRESH-B"), 0o644)
+
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	m := New(config.ThemesConfig{Source: src})
+	dst := filepath.Join(home, ".config", "archduino", "themes")
+	os.MkdirAll(filepath.Join(dst, "sub"), 0o755)
+	os.WriteFile(filepath.Join(dst, "one.toml"), []byte("FRESH-A"), 0o644)
+	os.WriteFile(filepath.Join(dst, "sub", "two.toml"), []byte("FRESH-B"), 0o644)
+
+	st, _ := m.Detect(context.Background())
+	p, _ := m.Plan(context.Background(), st)
+	if !p.IsEmpty() {
+		t.Fatalf("precondition: plan should be empty, got %+v", p.Actions)
+	}
+
+	os.WriteFile(filepath.Join(dst, "one.toml"), []byte("STALE"), 0o644)
+	os.WriteFile(filepath.Join(dst, "sub", "two.toml"), []byte("STALE"), 0o644)
+
+	plan, err := m.PlanForce(context.Background())
+	if err != nil {
+		t.Fatalf("PlanForce: %v", err)
+	}
+	if plan.IsEmpty() {
+		t.Fatal("force plan must not be empty")
+	}
+	for _, a := range plan.Actions {
+		if err := a.Exec(context.Background()); err != nil {
+			t.Fatalf("Exec: %v", err)
+		}
+	}
+	got, _ := os.ReadFile(filepath.Join(dst, "one.toml"))
+	if string(got) != "FRESH-A" {
+		t.Fatalf("one.toml not rewritten: %q", got)
+	}
+	got, _ = os.ReadFile(filepath.Join(dst, "sub", "two.toml"))
+	if string(got) != "FRESH-B" {
+		t.Fatalf("two.toml not rewritten: %q", got)
+	}
+}
+
 var _ module.Module = Module{}