Centralize managed state targets

internal/storage/path_test.go

@@ -49,6 +49,67 @@ func TestValidatePrefixAllowsRoot(t *testing.T) {
 	}
 }
 
+func TestStatePath(t *testing.T) {
+	tests := map[string]string{
+		"":       StateFileName,
+		"bundle": "bundle/" + StateFileName,
+	}
+	for bundlePath, want := range tests {
+		t.Run(bundlePath, func(t *testing.T) {
+			got, err := StatePath(bundlePath)
+			if err != nil {
+				t.Fatalf("StatePath(%q) error = %v", bundlePath, err)
+			}
+			if got != want {
+				t.Fatalf("StatePath(%q) = %q, want %q", bundlePath, got, want)
+			}
+		})
+	}
+}
+
+func TestManagedBundleTargets(t *testing.T) {
+	tests := []struct {
+		name       string
+		bundlePath string
+		outputs    []string
+		want       []string
+	}{
+		{
+			name:    "root",
+			outputs: []string{"report.html", "assets/style.css"},
+			want:    []string{"report.html", "assets/style.css", StateFileName},
+		},
+		{
+			name:       "nested",
+			bundlePath: "daily",
+			outputs:    []string{"report.html"},
+			want:       []string{"daily/report.html", "daily/" + StateFileName},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := ManagedBundleTargets(tt.bundlePath, tt.outputs)
+			if err != nil {
+				t.Fatalf("ManagedBundleTargets() error = %v", err)
+			}
+			if len(got) != len(tt.want) {
+				t.Fatalf("targets = %v, want %v", got, tt.want)
+			}
+			for i := range got {
+				if got[i] != tt.want[i] {
+					t.Fatalf("targets = %v, want %v", got, tt.want)
+				}
+			}
+		})
+	}
+}
+
+func TestManagedBundleTargetsRejectsInvalidOutputPath(t *testing.T) {
+	if _, err := ManagedBundleTargets("bundle", []string{"../outside"}); !IsInvalidPath(err) {
+		t.Fatalf("ManagedBundleTargets() error = %v, want invalid path", err)
+	}
+}
+
 func TestListSortsEntries(t *testing.T) {
 	backend := walkBackend{
 		entries: []Entry{