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Grouping, Forcing, and Skipping Tests

Grouping, Forcing, and Skipping Tests

Learn how to group tests using Jest's describe function and how to force or skip specific tests in a group using different keywords.

We'll cover the following...

Grouping tests

Within a test specification file, we may want to group our tests into logical sets. Jest uses the function describe for this purpose, as seen in the following tests:

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hello_jest.spec.ts
tsconfig.json
describe("a group of tests", () => {
  test("first test", () => {
    expect("string value").toEqual("string value");
  });
  it("second test", () => {
    expect("abc").not.toEqual("def");
  });
});

Here, we start our tests with the describe function. The describe function is very similar to the test function and also has two parameters.

  • The first parameter is a string value for the name of the group of tests or the test suite.

  • The second parameter is a function containing the set of tests.

Within this describe function, we have a test named "first test" on lines 2–4 and another test named "second test" on lines 5–7.

Note: The second test uses the it function and not the test function.

These two function names are synonymous because the it function ...