📖 Step 7: Testing & Quality#204 / 291

Code Coverage

📖One-line summary

A metric showing what percentage of the code is exercised by tests.

Measures what % of code the tests exercise

1function login(email, pw) {

2 if (!email) return null;

3 if (!pw) return null;

4 const user = db.find(email);

5 if (!user) throw Error();

6 return createToken(user);

Add config to generate Jest test coverage reports. Fail CI if coverage is below 80%.

Find files with low test coverage and build a priority list of files to write tests for first.

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