test(17-01): add tests for UNIT-01, UNIT-02, UNIT-03 requirements

UNIT-01: Modal renders with currentSession props
- Test privacy value displayed from currentSession
- Test description value displayed from currentSession
- Test modal title renders

UNIT-02: Save functionality
- Test onSave called with correct payload on save click
- Test onSave called with updated values after user changes

UNIT-03: Loading state
- Test save button disabled when loading
- Test cancel button disabled when loading
- Test description textarea disabled when loading
- Test "Saving..." text shown when loading

jam-ui/src/components/client/__tests__/JKSessionSettingsModal.test.js

@@ -33,9 +33,117 @@ const renderModal = (props = {}) => {
 };
 
 describe('JKSessionSettingsModal', () => {
-  // Placeholder test to verify setup
-  test('renders without crashing', () => {
-    renderModal();
-    expect(screen.getByText('Session Settings')).toBeInTheDocument();
+  // UNIT-01: Modal renders with currentSession props
+  describe('rendering with currentSession props (UNIT-01)', () => {
+    test('displays privacy value from currentSession', () => {
+      renderModal({
+        currentSession: {
+          privacy: SESSION_PRIVACY_MAP.public,
+          description: ''
+        }
+      });
+
+      const privacySelect = screen.getByTestId('session-privacy');
+      expect(privacySelect.value).toBe(String(SESSION_PRIVACY_MAP.public));
+    });
+
+    test('displays description value from currentSession', () => {
+      const testDescription = 'My test session description';
+      renderModal({
+        currentSession: {
+          privacy: SESSION_PRIVACY_MAP.private_approve,
+          description: testDescription
+        }
+      });
+
+      const descriptionInput = screen.getByRole('textbox');
+      expect(descriptionInput.value).toBe(testDescription);
+    });
+
+    test('renders modal title', () => {
+      renderModal();
+      expect(screen.getByText('Session Settings')).toBeInTheDocument();
+    });
+  });
+
+  // UNIT-02: Save button calls onSave with correct payload
+  describe('save functionality (UNIT-02)', () => {
+    test('calls onSave with privacy and description when save clicked', () => {
+      const mockOnSave = jest.fn();
+      renderModal({
+        currentSession: {
+          privacy: SESSION_PRIVACY_MAP.public,
+          description: 'Original description'
+        },
+        onSave: mockOnSave
+      });
+
+      const saveButton = screen.getByRole('button', { name: /save/i });
+      fireEvent.click(saveButton);
+
+      expect(mockOnSave).toHaveBeenCalledTimes(1);
+      expect(mockOnSave).toHaveBeenCalledWith({
+        privacy: SESSION_PRIVACY_MAP.public,
+        description: 'Original description'
+      });
+    });
+
+    test('calls onSave with updated values after user changes', () => {
+      const mockOnSave = jest.fn();
+      renderModal({
+        currentSession: {
+          privacy: SESSION_PRIVACY_MAP.private_approve,
+          description: ''
+        },
+        onSave: mockOnSave
+      });
+
+      // Change privacy
+      const privacySelect = screen.getByTestId('session-privacy');
+      fireEvent.change(privacySelect, { target: { value: String(SESSION_PRIVACY_MAP.public) } });
+
+      // Change description
+      const descriptionInput = screen.getByRole('textbox');
+      fireEvent.change(descriptionInput, { target: { value: 'New description' } });
+
+      // Click save
+      const saveButton = screen.getByRole('button', { name: /save/i });
+      fireEvent.click(saveButton);
+
+      expect(mockOnSave).toHaveBeenCalledWith({
+        privacy: String(SESSION_PRIVACY_MAP.public),
+        description: 'New description'
+      });
+    });
+  });
+
+  // UNIT-03: Loading state disables form interactions
+  describe('loading state (UNIT-03)', () => {
+    test('disables save button when loading', () => {
+      renderModal({ loading: true });
+
+      const saveButton = screen.getByRole('button', { name: /saving/i });
+      expect(saveButton).toBeDisabled();
+    });
+
+    test('disables cancel button when loading', () => {
+      renderModal({ loading: true });
+
+      const cancelButton = screen.getByRole('button', { name: /cancel/i });
+      expect(cancelButton).toBeDisabled();
+    });
+
+    test('disables description textarea when loading', () => {
+      renderModal({ loading: true });
+
+      const descriptionInput = screen.getByRole('textbox');
+      expect(descriptionInput).toBeDisabled();
+    });
+
+    test('shows "Saving..." text on save button when loading', () => {
+      renderModal({ loading: true });
+
+      expect(screen.getByRole('button', { name: /saving/i })).toBeInTheDocument();
+    });
   });
 });