Add behavioural tests for Cluster Menu K8s Resources in Sidebar menu not being shown (#7280)

* Add behavioural tests to cover bug fix

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Remove previous fix to fix last test

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* More consistent impl of flushPromises

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Fixup tests

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Remove ContextHandler test (dead code)

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Fix PrometheusHandler describe text

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Fix type errors

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Add useful case test-utils helper

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Rename file to match token

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Cleanup tests to fix type errors and use tables

Signed-off-by: Sebastian Malton <sebastian@malton.name>

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Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/core/src/test-utils/cast.ts

@@ -0,0 +1,6 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+
+export const cast = <T>(data: Partial<T>): T => data as T;

packages/core/src/test-utils/mock-interface.ts

@@ -0,0 +1,17 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+
+import type { AsyncFnMock } from "@async-fn/jest";
+
+type GetMockedType<T> =
+  T extends (...args: any[]) => Promise<any>
+    ? AsyncFnMock<T>
+    : T extends (...args: any[]) => any
+      ? jest.MockedFunction<T>
+      : T;
+
+export type Mocked<T extends object> = {
+  -readonly [P in keyof T]: GetMockedType<T[P]>;
+};