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spy_mock_test.go
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spy_mock_test.go
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package mmock
import (
"errors"
"github.com/stretchr/testify/assert"
"testing"
)
func TestNewSpyMockOf(t *testing.T) {
underlying := &underlyingFull{
calls: map[string]int{},
}
spy := NewSpyMockOf[mockedMy, my](underlying)
_, err := spy.DoSomething("x", 1)
assert.Error(t, err)
_, err = spy.DoSomething("x", 1)
assert.Error(t, err)
spy.AssertMethodCalled(t, spy.DoSomething)
spy.AssertNumberOfMethodCalls(t, spy.DoSomething, 2)
assert.Equal(t, 2, underlying.calls["DoSomething"])
}
func TestNewSpyMockOf_PanicsWithBadMockImpl(t *testing.T) {
underlying := &underlyingFull{
calls: map[string]int{},
}
type otherMockedImpl struct {
MockMethods
}
assert.Panics(t, func() {
// panics because OtherMockedImpl does not implement my
_ = NewSpyMockOf[otherMockedImpl, my](underlying)
})
}
func TestSpyMock(t *testing.T) {
underlying := &underlyingMin{
calls: map[string]int{},
}
spy := NewMockOf[mockedMy, my]()
spy.SetSpyOf(underlying)
//spy.OnMethod(spy.DoSomething).Return(nil, nil)
_, err := spy.DoSomething("x", 1)
assert.Error(t, err)
_, err = spy.DoSomething("x", 1)
assert.Error(t, err)
spy.AssertMethodCalled(t, spy.DoSomething)
spy.AssertNumberOfMethodCalls(t, spy.DoSomething, 2)
assert.Equal(t, 2, underlying.calls["DoSomething"])
}
func TestSpyMock_Once(t *testing.T) {
underlying := &underlyingMin{
calls: map[string]int{},
}
spy := NewMockOf[mockedMy, my]()
spy.SetSpyOf(underlying)
spy.OnMethod(spy.DoSomething).Once().Return(nil, nil)
_, err := spy.DoSomething("x", 1)
assert.NoError(t, err)
_, err = spy.DoSomething("x", 1)
assert.Error(t, err)
spy.AssertMethodCalled(t, spy.DoSomething)
spy.AssertNumberOfMethodCalls(t, spy.DoSomething, 2)
assert.Equal(t, 1, underlying.calls["DoSomething"])
}
func TestSpyMock_MatchingArgs(t *testing.T) {
underlying := &underlyingMin{
calls: map[string]int{},
}
spy := NewMockOf[mockedMy, my]()
spy.SetSpyOf(underlying)
spy.OnMethod(spy.DoSomething, "x").Return(nil, nil)
_, err := spy.DoSomething("x", 1)
assert.NoError(t, err)
_, err = spy.DoSomething("y", 1)
assert.Error(t, err)
spy.AssertMethodCalled(t, spy.DoSomething)
spy.AssertNumberOfMethodCalls(t, spy.DoSomething, 2)
assert.Equal(t, 1, underlying.calls["DoSomething"])
}
func TestSpyMock_PanicsWithNonImplementedMethod(t *testing.T) {
underlying := &underlyingMin{
calls: map[string]int{},
}
spy := NewMockOf[mockedMy, my]()
spy.SetSpyOf(underlying)
assert.Panics(t, func() {
_, _ = spy.DoSomethingElse("", 0)
})
spy.OnMethod(spy.DoSomethingElse).Return(SomeStruct{}, nil)
_, err := spy.DoSomethingElse("", 0)
assert.NoError(t, err)
assert.Equal(t, 0, underlying.calls["DoSomethingElse"])
}
type underlyingMin struct {
calls map[string]int
}
func (um *underlyingMin) DoSomething(s string, i int) (*SomeStruct, error) {
um.calls["DoSomething"] = um.calls["DoSomething"] + 1
return nil, errors.New("foo")
}
/* Don't implement this method to ensure calling it panics
func (um *underlyingMin) DoSomethingElse(s string, i int) (SomeStruct, error) {
um.calls["DoSomethingElse"] = um.calls["DoSomethingElse"] + 1
return SomeStruct{}, nil
}
*/
type underlyingFull struct {
calls map[string]int
}
func (um *underlyingFull) DoSomething(s string, i int) (*SomeStruct, error) {
um.calls["DoSomething"] = um.calls["DoSomething"] + 1
return nil, errors.New("foo")
}
func (um *underlyingFull) DoSomethingElse(s string, i int) (SomeStruct, error) {
um.calls["DoSomethingElse"] = um.calls["DoSomethingElse"] + 1
return SomeStruct{}, nil
}