feat: Modify loading indicator to support a paused state (#506)

packages/cli/src/ui/components/LoadingIndicator.test.tsx

@@ -0,0 +1,94 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { render } from 'ink-testing-library';
+import { Text } from 'ink'; // Import Text directly from ink
+import { LoadingIndicator } from './LoadingIndicator.js';
+
+vi.mock('ink-spinner', () => ({
+  default: function MockSpinner() {
+    return <Text>MockSpinner</Text>;
+  },
+}));
+
+describe('<LoadingIndicator />', () => {
+  it('should not render when isLoading is false', () => {
+    const { lastFrame } = render(
+      <LoadingIndicator
+        isLoading={false}
+        showSpinner={true}
+        currentLoadingPhrase="Loading..."
+        elapsedTime={0}
+      />,
+    );
+    expect(lastFrame()).toBe('');
+  });
+
+  it('should render spinner, phrase, and time when isLoading is true and showSpinner is true', () => {
+    const phrase = 'Processing data...';
+    const time = 5;
+    const { lastFrame } = render(
+      <LoadingIndicator
+        isLoading={true}
+        showSpinner={true}
+        currentLoadingPhrase={phrase}
+        elapsedTime={time}
+      />,
+    );
+
+    const output = lastFrame();
+    expect(output).toContain(phrase);
+    expect(output).toContain(`(esc to cancel, ${time}s)`);
+    // Check for spinner presence by looking for its characteristic characters or structure
+    // This is a bit fragile as it depends on Spinner's output.
+    // A more robust way would be to mock Spinner and check if it was rendered.
+    expect(output).toContain('MockSpinner'); // Check for the mocked spinner text
+  });
+
+  it('should render phrase and time but no spinner when isLoading is true and showSpinner is false', () => {
+    const phrase = 'Waiting for input...';
+    const time = 10;
+    const { lastFrame } = render(
+      <LoadingIndicator
+        isLoading={true}
+        showSpinner={false}
+        currentLoadingPhrase={phrase}
+        elapsedTime={time}
+      />,
+    );
+    const output = lastFrame();
+    expect(output).toContain(phrase);
+    expect(output).toContain(`(esc to cancel, ${time}s)`);
+    // Ensure spinner characters are NOT present
+    expect(output).not.toContain('MockSpinner');
+  });
+
+  it('should display the currentLoadingPhrase correctly', () => {
+    const specificPhrase = 'Almost there!';
+    const { lastFrame } = render(
+      <LoadingIndicator
+        isLoading={true}
+        showSpinner={true}
+        currentLoadingPhrase={specificPhrase}
+        elapsedTime={3}
+      />,
+    );
+    expect(lastFrame()).toContain(specificPhrase);
+  });
+
+  it('should display the elapsedTime correctly', () => {
+    const specificTime = 7;
+    const { lastFrame } = render(
+      <LoadingIndicator
+        isLoading={true}
+        showSpinner={true}
+        currentLoadingPhrase="Working..."
+        elapsedTime={specificTime}
+      />,
+    );
+    expect(lastFrame()).toContain(`(esc to cancel, ${specificTime}s)`);
+  });
+});