Increase testability through dependency injection
- Remove existing integration tests for hooks as they're redundant after this change. - Document the pattern in relevant documentation. - Introduce `useEnvironment` to increase testability. - Update components to inject dependencies rather than importing hooks directly.
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import 'mocha';
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import { expect } from 'chai';
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import { useEnvironment } from '@/presentation/components/Shared/Hooks/UseEnvironment';
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import { itEachAbsentObjectValue } from '@tests/unit/shared/TestCases/AbsentTests';
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import { EnvironmentStub } from '@tests/unit/shared/Stubs/EnvironmentStub';
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describe('UseEnvironment', () => {
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describe('environment is absent', () => {
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itEachAbsentObjectValue((absentValue) => {
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// arrange
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const expectedError = 'missing environment';
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const environmentValue = absentValue;
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// act
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const act = () => useEnvironment(environmentValue);
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// assert
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expect(act).to.throw(expectedError);
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});
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});
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it('returns expected environment', () => {
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// arrange
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const expectedEnvironment = new EnvironmentStub();
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// act
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const actualEnvironment = useEnvironment(expectedEnvironment);
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// assert
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expect(actualEnvironment).to.equal(expectedEnvironment);
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});
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});
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