missing-test-assertion

added in: 4.21.0

warning

Warns that there is no assertion in the test.

Use include-assertions configuration, if you want to include specific assertions. Defaults to Dart default assertions including expect, expectLater, all expectAsync variants and fail.

Use include-methods configuration, if you want the linter to check particular test methods for missing assertions. Defaults to test and testWidgets methods.

⚙️ Config example

dart_code_metrics:
  ...
  rules:
    ...
    - missing-test-assertion:
        include-assertions:
          - verify
        include-methods:
          - customTest

Example

❌ Bad:

test('bad unit test', () {
    // Given
    final a = 1;
    final b = 2;

    // When
    final c = a + 1;
});

✅ Good:

test('good unit test', () {
    // Given
    final a = 1;
    final b = 2;

    // When
    final c = a + 1;

    // Then : actual assertion
    expect(b, c);
});