Mocking Proxy Mechanism Unit Spec › basic functionality
  ✅ should allow assignment to itself even with private parts
  ✅ should create jest.fn() without any invocation
  ✅ should register invocations correctly
Mocking Proxy Mechanism Unit Spec › mock return values and arguments
  ✅ should allow mocking a return value
  ✅ should allow specifying arguments
Mocking Proxy Mechanism Unit Spec › mock properties
  ✅ should allow setting properties
  ✅ should allow setting boolean properties to false or null
  ✅ should allow setting properties to undefined explicitly
Mocking Proxy Mechanism Unit Spec › mock implementation
  ✅ should allow providing mock implementations for properties
  ✅ should allow providing mock implementations for functions
Mocking Proxy Mechanism Unit Spec › promises
  ✅ should successfully use mock for promises resolving
  ✅ should successfully use mock for promises rejecting
Mocking Proxy Mechanism Unit Spec › mocking a date objects
  ✅ should allow calling native date object methods