expect(x).toBe(y)

The toBe matcher passes if x is of the same type and value of y. The toBe matcher uses === to perform this comparison.

expect(x).toBeDefined()

The toBeDefined matcher is used to ensure that x is defined.

expect(x).toBeUndefined()

The toBeUndefined matcher is used to ensure that x is undefined.

expect(x).toBeNull()

The toBeNull matcher is used to ensure that x is null.

expect(x).toBeTruthy()

The toBeTruthy matcher is used to ensure that x is truthy.

expect(x).toBeFalsy()

The toBeFalsy matcher is used to ensure that x is falsy.

expect(x).toContain(y)

The toContain matcher is used to check whether the x string or array value contains y. A valid y value can be a substring of x or an item of x.

expect(x).toBeLessThan(y)

The toBeLessThan matcher is used to ensure that x is less than y.

expect(x).toBeGreaterThan(y)

The toBeGreaterThan matcher is used to ensure that x is greater than y.

expect(x).toMatch(y)

The toMatch matcher is used to check whether x matches a string or regular expression (y).