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jest-styled-components

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jest-styled-components

Jest utilities for Styled Components

  • 4.4.0
  • Source
  • npm
  • Socket score

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721K
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What is jest-styled-components?

jest-styled-components is a Jest utility for testing styled-components. It provides custom matchers to test the styles applied to your components, making it easier to ensure that your styled-components are rendered correctly.

What are jest-styled-components's main functionalities?

toHaveStyleRule

The `toHaveStyleRule` matcher allows you to check if a specific style rule is applied to a component. In this example, it verifies that the `Button` component has a `color` style rule set to `red`.

const styled = require('styled-components').default;
const { toHaveStyleRule } = require('jest-styled-components');
expect.extend({ toHaveStyleRule });

const Button = styled.button`
  color: red;
`;

// Test
it('should have red color', () => {
  const wrapper = mount(<Button />);
  expect(wrapper).toHaveStyleRule('color', 'red');
});

toMatchSnapshot

The `toMatchSnapshot` matcher allows you to take a snapshot of the rendered component and compare it to a previously saved snapshot. This is useful for ensuring that the component's styles have not changed unexpectedly.

const styled = require('styled-components').default;
const { toMatchSnapshot } = require('jest-styled-components');
expect.extend({ toMatchSnapshot });

const Button = styled.button`
  color: red;
`;

// Test
it('should match the snapshot', () => {
  const wrapper = mount(<Button />);
  expect(wrapper).toMatchSnapshot();
});

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Package last updated on 11 Aug 2017

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