fix: compare functional option names for indirect calls

Closes Functional Options testing broken for indirect calls stretchr#1380

mock/mock.go

@@ -1248,5 +1248,12 @@ func assertOpts(expected, actual interface{}) (expectedFmt, actualFmt string) {
 
 func funcName(opt interface{}) string {
 	n := runtime.FuncForPC(reflect.ValueOf(opt).Pointer()).Name()
-	return strings.TrimSuffix(path.Base(n), path.Ext(n))
+	trimmed := strings.TrimSuffix(path.Base(n), path.Ext(n))
+	splitted := strings.Split(trimmed, ".")
+
+	if len(splitted) == 0 {
+		return trimmed
+	}
+
+	return splitted[len(splitted)-1]
 }

mock/mock_test.go

@@ -55,6 +55,10 @@ func (i *TestExampleImplementation) TheExampleMethodFunctionalOptions(x string,
 	return args.Error(0)
 }
 
+func TheExampleMethodFunctionalOptionsIndirect(i *TestExampleImplementation) {
+	i.TheExampleMethodFunctionalOptions("test", OpNum(1), OpStr("foo"))
+}
+
 //go:noinline
 func (i *TestExampleImplementation) TheExampleMethod2(yesorno bool) {
 	i.Called(yesorno)
@@ -1455,6 +1459,23 @@ func Test_Mock_AssertExpectationsFunctionalOptionsType(t *testing.T) {
 
 }
 
+func Test_Mock_AssertExpectationsFunctionalOptionsTypeIndirectly(t *testing.T) {
+
+	var mockedService = new(TestExampleImplementation)
+
+	mockedService.On("TheExampleMethodFunctionalOptions", "test", FunctionalOptions(OpNum(1), OpStr("foo"))).Return(nil).Once()
+
+	tt := new(testing.T)
+	assert.False(t, mockedService.AssertExpectations(tt))
+
+	// make the call now
+	TheExampleMethodFunctionalOptionsIndirect(mockedService)
+
+	// now assert expectations
+	assert.True(t, mockedService.AssertExpectations(tt))
+
+}
+
 func Test_Mock_AssertExpectationsFunctionalOptionsType_Empty(t *testing.T) {
 
 	var mockedService = new(TestExampleImplementation)
@@ -1472,6 +1493,20 @@ func Test_Mock_AssertExpectationsFunctionalOptionsType_Empty(t *testing.T) {
 
 }
 
+func Test_Mock_AssertExpectationsFunctionalOptionsType_Diff(t *testing.T) {
+
+	var mockedService = new(TestExampleImplementation)
+
+	mockedService.On("TheExampleMethodFunctionalOptions", "test", FunctionalOptions(OpNum(1))).Return(nil).Once()
+
+	tt := new(testing.T)
+	assert.False(t, mockedService.AssertExpectations(tt))
+
+	assert.Panics(t, func() {
+		mockedService.TheExampleMethodFunctionalOptions("test", OpStr("1"))
+	})
+}
+
 func Test_Mock_AssertExpectations_With_Repeatability(t *testing.T) {
 
 	var mockedService = new(TestExampleImplementation)