Bug WikiError Handling & ValidationMissing test coverage
1 example

Missing test coverage

Code paths not adequately covered by tests.

[ FAQ1 ]

What is missing test coverage?

Missing test coverage refers to sections or components of code that lack adequate unit or integration tests. Insufficient test coverage means certain code paths or logic aren't verified during automated testing, allowing bugs or unexpected behavior to persist unnoticed. Low coverage leads to reduced confidence in code reliability, complicates refactoring efforts, and increases the likelihood of introducing regressions during updates. Monitoring test coverage, typically measured through tools like Jest, helps ensure thorough testing and dependable application behavior.
[ FAQ2 ]

How to fix missing test coverage

To fix missing test coverage, write comprehensive unit tests for previously untested code paths or functionalities, focusing on edge cases and critical logic. Employ automated testing frameworks such as Jest to systematically measure and track coverage, setting clear thresholds to maintain or improve coverage over time. Integrate coverage checks into continuous integration (CI) workflows to enforce coverage standards and identify gaps early. Regularly review and analyze coverage reports to proactively target and resolve untested or under-tested areas, ensuring consistent quality and reliability across your codebase.
storybookjs/storybook·#29643
diff block
expect(actualMount).toHaveBeenCalled();
});
+ it('should handle the "finished" phase correctly when the story finishes successfully', async () => {
+ // Arrange - setup StoryRender and async gate blocking finished phase
+ const [finishGate, resolveFinishGate] = createGate();
+ const story = buildStory({
+ playFunction: vi.fn(async () => {
+ await finishGate;
+ }),
+ });
+ const store = buildStore();
+
+ const channel = new Channel({});
+ const emitSpy = vi.spyOn(channel, 'emit');
+
+ const render = new StoryRender(
+ channel,
+ store,
+ vi.fn() as any,
+ {} as any,
+ entry.id,
+ 'story',
+ { autoplay: true },
+ story
+ );
+
+ // Act - render, resolve finish gate, teardown
+ render.renderToElement({} as any);
+ await tick(); // go from 'loading' to 'rendering' phase
+ resolveFinishGate();
+ await tick(); // go from 'rendering' to 'finished' phase
+ render.teardown();
+
+ // Assert - ensure finished phase is handled correctly
+ expect(render.phase).toBe('finished');
+ expect(emitSpy).toHaveBeenCalledWith(STORY_FINISHED, {
+ reporters: [],
+ status: 'success',
+ storyId: 'id',
+ });
Greptile
greptile
logic: Empty reporters array may indicate missing test coverage for cases where reporters are actually present