test(ioscompanion): cover paste threshold, retry flow, and sentinel detection

internal/driver/ioscompanion/hierarchymap_test.go

@@ -222,3 +222,24 @@ func TestRootIsFlatWithAllChildren(t *testing.T) {
 		t.Fatalf("root bounds = %+v, want %+v", tree.Root.Bounds, wantRoot)
 	}
 }
+
+func TestHasUnresolvedValues(t *testing.T) {
+	cases := []struct {
+		name string
+		dump string
+		want bool
+	}{
+		{name: "sentinel value", dump: `[{"type":"TextField","AXValue":"Invalid","frame":{"x":0,"y":0,"width":1,"height":1}}]`, want: true},
+		{name: "clean values", dump: `[{"type":"TextField","AXValue":"hello","frame":{"x":0,"y":0,"width":1,"height":1}}]`, want: false},
+		{name: "empty value", dump: `[{"type":"TextField","AXValue":"","frame":{"x":0,"y":0,"width":1,"height":1}}]`, want: false},
+		{name: "empty dump", dump: `[]`, want: false},
+		{name: "malformed dump", dump: `nope`, want: false},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			if got := hasUnresolvedValues([]byte(c.dump)); got != c.want {
+				t.Fatalf("got %v, want %v", got, c.want)
+			}
+		})
+	}
+}