Unit Test Vue Pinia

What it does

When your agent uses it

• Updating tests for components
• Mocking Pinia with createTestingPinia
• Applying Vue Test Utils patterns
• Enforcing black-box assertions over implementation details

Example prompts

• “/unit-test-vue-pinia”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

1. 1Identify the behavior boundary first: component UI behavior, composable behavior, or store behavior.
2. 2Choose the narrowest test style that can prove that behavior.
3. 3Set up Pinia with the least powerful option that still covers the scenario.
4. 4Drive the test through public inputs such as props, form updates, button clicks, emitted child events, and store APIs.
5. 5Assert observable outputs and side effects before considering any instance-level assertion.
6. 6Return or review tests with clear behavior-oriented names and note any remaining coverage gaps.

What it can do on your machine

Read from SKILL.md and the folder at commit 727ff2e. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • test-utils.vuejs.org
  • pinia.vuejs.org

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Unit Test Vue Pinia loads about 1.8k tokens when it runs, and up to ~2.2k if it reads all its reference files. Until then it costs about 78 tokens; SKILL.md has 720 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~78

When it runs · the whole SKILL.md, loaded when a task matches

~1.8k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~2.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from github/awesome-copilot at commit 727ff2e, republished under its MIT licence (© github). 720 words, ~1,777 tokens.

name

unit-test-vue-pinia

description

Write and review unit tests for Vue 3 + TypeScript + Vitest + Pinia codebases. Use when creating or updating tests for components, composables, and stores; mocking Pinia with createTestingPinia; applying Vue Test Utils patterns; and enforcing black-box assertions over implementation details.

category

testing

const wrapper = mount(ComponentUnderTest, {
	global: {
		plugins: [
			createTestingPinia({
				createSpy: vi.fn,
			}),
		],
	},
});

const wrapper = mount(ComponentUnderTest, {
	global: {
		plugins: [
			createTestingPinia({
				createSpy: vi.fn,
				stubActions: false,
			}),
		],
	},
});

const wrapper = mount(ComponentUnderTest, {
	global: {
		plugins: [
			createTestingPinia({
				createSpy: vi.fn,
				initialState: {
					counter: { n: 20 },
					user: { name: "Leia Organa" },
				},
			}),
		],
	},
});

const wrapper = mount(ComponentUnderTest, {
	global: {
		plugins: [
			createTestingPinia({
				createSpy: vi.fn,
				plugins: [myPiniaPlugin],
			}),
		],
	},
});

const pinia = createTestingPinia({ createSpy: vi.fn });
const store = useCounterStore(pinia);

store.double = 999;
// @ts-expect-error test-only reset of overridden getter
store.double = undefined;

beforeEach(() => {
	setActivePinia(createPinia());
});

it("increments", () => {
	const counter = useCounterStore();
	counter.increment();
	expect(counter.n).toBe(1);
});

await wrapper.find("button").trigger("click");
expect(wrapper.emitted("submit")?.[0]?.[0]).toBe("Mango Mission");

await wrapper.find("input").setValue("Agent Violet");
await wrapper.find("form").trigger("submit");
expect(wrapper.emitted("save")?.[0]?.[0]).toBe("Agent Violet");

© github, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in skills/unit-test-vue-pinia of github/awesome-copilot.

• SKILL.md
• references/pinia-patterns.md

Open the folder on GitHubat commit 727ff2e

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in github/awesome-copilot, which our catalogue first saw on October 7, 2026.

• boshi-xixixi/TraeSkill.trae/Skills/.agents/skills/unit-test-vue-pinia