method Assert.prototype.propContains Assert.prototype.propContains(actual: unknown,expected: unknown,message?: string): void Asserts that actual contains all own enumerable properties from expected with matching values. Extra properties on actual are allowed and ignored. Examples Example 1 assert.propContains({ a: 1, b: 2, c: 3 }, { a: 1, b: 2 }); assert.propContains(user, { role: "admin" }); Parameters actual: unknown The actual object (may have extra keys). expected: unknown The subset of key/value pairs that must be present. optional message: string Optional failure message. Return Type void