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noExcessiveNestedTestSuites (since v1.6.0)

Diagnostic Category: lint/complexity/noExcessiveNestedTestSuites

Sources:

This rule enforces a maximum depth to nested describe() in test files.

To improve code clarity in your tests, the rule limits nested describe to 5.

Examples

Section titled Examples

Invalid

Section titled Invalid
describe('foo', () => {
  describe('bar', () => {
    describe('baz', () => {
      describe('qux', () => {
        describe('quxx', () => {
          describe('too many', () => {
            it('should get something', () => {
              expect(getSomething()).toBe('Something');
            });
          });
        });
      });
    });
  });
});
code-block.js:6:11 lint/complexity/noExcessiveNestedTestSuites ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Excessive `describe()` nesting detected.
  
     4 │       describe('qux', () => {
     5 │         describe('quxx', () => {
   > 6 │           describe('too many', () => {
       │           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   > 7 │             it('should get something', () => {
   > 8 │               expect(getSomething()).toBe('Something');
   > 9 │             });
  > 10 │           });
       │           ^^
    11 │         });
    12 │       });
  
  ℹ Excessive nesting of describe() calls can hinder test readability.
  
  ℹ Consider refactoring and reduce the level of nested describe to improve code clarity.

Valid

Section titled Valid
describe('foo', () => {
  describe('bar', () => {
    it('should get something', () => {
      expect(getSomething()).toBe('Something');
    });
  });
  describe('qux', () => {
    it('should get something', () => {
      expect(getSomething()).toBe('Something');
    });
  });
});
Section titled Related links