300-testing-vitest.md

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---
description: Apply these testing rules when verifying or writing new test suites to ensure quality and coverage
globs: **/*.test.ts
alwaysApply: false
---

Testing Standards

blefnk/rules 1.0.0

Context

• Ensures consistent testing conventions for unit and integration tests
• Uses vitest for all test files matching **/*.test.ts

Requirements

• Use Vitest as the testing framework.
• Group related tests logically (describe blocks).
• Write clear, atomic assertions; avoid chaining multiple, unrelated checks in one test.
• Test only critical logic or components; avoid trivial or redundant tests.
• Give each test a descriptive name that clarifies its purpose and expected outcome.

Examples

import { describe, it, expect } from "vitest";

describe("Button component", () => { it("renders with default props", () => { const result = renderButton(); // Pseudocode expect(result).toContain(""); }); });

test("Test all app logic in one big function", () => { // Overly broad testing, unclear assertions });