Function assert

typeof

equal

• equal<T>(
      actual: unknown,
      expected: T,
      details?: Details,
      errConstructor?: GenericErrorConstructor,
      options?: AssertMakeErrorOptions,
  ): asserts actual is T

  The assert.equal method

  Assert that two values must be Object.is.

  Type Parameters

  • T

  Parameters

  • actual: unknown

    What we received
  • expected: T

    What we wanted
  • Optionaldetails: Details

    The details of what was asserted
  • OptionalerrConstructor: GenericErrorConstructor

    An optional alternate error constructor to use
  • Optionaloptions: AssertMakeErrorOptions

  Returns asserts actual is T

fail

• fail(
      details?: Details,
      errConstructor?: GenericErrorConstructor,
      options?: AssertMakeErrorOptions,
  ): never

  The assert.fail method.

  Fail an assertion, recording full details to the console and raising an exception with a message in which details substitution values have been redacted.

  The optional optDetails can be a string for backwards compatibility with the nodejs assertion library.

  Parameters

  • Optionaldetails: Details

    The details of what was asserted
  • OptionalerrConstructor: GenericErrorConstructor

    An optional alternate error constructor to use
  • Optionaloptions: AssertMakeErrorOptions

  Returns never

string

• string(specimen: any, details?: Details): asserts specimen is string

  The assert.string method.

  assert.string(v) is equivalent to assert.typeof(v, 'string'). We special case this one because it is the most frequently used.

  Assert an expected typeof result.

  Parameters

  • specimen: any
  • Optionaldetails: Details

    The details of what was asserted

  Returns asserts specimen is string