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Field Type Matcher #237
Description
Is it possible to add a matcher per type and use it? Whenever I use decimal.Decimal from github.com/shopspring/decimal as a field in in one of my structs, my mocks fail because precision in the type.
type MyType struct {
Field1 string
Field2 string
Field3 decimal.Decimal
}func Test_MyType(t *testing.T) {
type MyType struct {
Field1 string
Field2 string
Field3 decimal.Decimal
}
controller := gomock.NewController(t)
client := NewMock(controller)
client.EXPECT().MyFunction(gomock.Any(), MyType{}).Return().Times(1) // this fails
}Is there a way to match these types in gomock?
If no, is there a way to extend gomock to match by specfic type in this case it is decimal.Decimal instead of writing a matcher for whole MyType struct
As a POC I did something like this:
func Test_MyType(t *testing.T) {
type MyType struct {
Field1 string
Field2 string
Field3 decimal.Decimal
}
decimalMatcher := DecimalMatcher{}
controller := gomock.NewController(t, gomock.WithFieldMatcher[decimal.Decimal](decimalMatcher))
client := NewMock(controller)
client.EXPECT().MyFunction(gomock.Any(), MyType{}).Return().Times(1)
fmt.Println(client)
}
type DecimalMatcher struct {
}
func (d DecimalMatcher) Matches(x any) bool {
return true
}
func (d DecimalMatcher) String() string {
return "foo"
}This is for extending go mock whenever it sees a ``decimal.Decimal` type, it uses the custom matcher given instead of writing a new matcher for whole struct
Reacted by KrzysztofJopek
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