Interface IHasOp<R>

all

expect({ a: 1, b: 2 }).has.all.keys('a', 'b');
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any

expect({ a: 1, b: 2 }).has.any.keys('a', 'b');
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iterator

expect({ [Symbol.iterator]: () => {} }).has.iterator();
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nested

expect({ a: { b: { c: 1 } } }).has.nested.property('a.b.c');
expect({ a: { b: { c: 1 } } }).to.have.nested.property('a.b.c', 1);
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own

expect({ a: 1, b: 2 }).has.own.property('a');
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property

expect({ a: 1, b: 2 }).has.property('a');
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propertyDescriptor

expect({ a: 1, b: 2 }).has.propertyDescriptor('a');
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lengthOf

• lengthOf(n: number, evalMsg?: MsgSource): R

  Asserts that the target has a length or size property equal to the given number. Works with arrays, strings, Maps, Sets, and any object with a length or size property.

  Parameters

  • n: number
  • OptionalevalMsg: MsgSource

    Optional error message.

  Returns R

  Since

  0.1.5

  Example

  expect([1, 2, 3]).has.lengthOf(3);           // Passes - array length is 3
  expect("hello").has.lengthOf(5);             // Passes - string length is 5
  expect(new Map([["a", 1]])).has.lengthOf(1); // Passes - Map size is 1
  expect(new Set([1, 2])).has.lengthOf(2);     // Passes - Set size is 2
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sizeOf

• sizeOf(n: number, evalMsg?: MsgSource): R

  Asserts that the target has a size or length property equal to the given number. Works with arrays, strings, Maps, Sets, and any object with a length or size property.

  Parameters

  • n: number
  • OptionalevalMsg: MsgSource

    Optional error message.

  Returns R

  Since

  0.1.5

  Example

  expect([1, 2, 3]).has.sizeOf(3);           // Passes - array length is 3
  expect("hello").has.sizeOf(5);             // Passes - string length is 5
  expect(new Map([["a", 1]])).has.sizeOf(1); // Passes - Map size is 1
  expect(new Set([1, 2])).has.sizeOf(2);     // Passes - Set size is 2
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