func (t *GenerateTest) runGoldenTest(
caseName string,
nilPtrs ...interface{}) {
// Make a slice of interface types to give to GenerateMockSource.
interfaces := make([]reflect.Type, len(nilPtrs))
for i, ptr := range nilPtrs {
interfaces[i] = reflect.TypeOf(ptr).Elem()
}
// Create the mock source.
buf := new(bytes.Buffer)
err := generate.GenerateMockSource(buf, "some_pkg", interfaces)
AssertEq(nil, err, "Error from GenerateMockSource: %v", err)
// Read the golden file.
goldenPath := path.Join("test_cases", "golden."+caseName+".go")
goldenData := readFileOrDie(goldenPath)
// Compare the two.
identical := (buf.String() == string(goldenData))
ExpectTrue(identical, "Output doesn't match for case '%s'.", caseName)
// Write out a new golden file if requested.
if !identical && *dumpNew {
writeContentsToFileOrDie(buf.Bytes(), goldenPath)
}
}
func (t *GenerateTest) EmptySetOfInterfaces() {
err := generate.GenerateMockSource(
new(bytes.Buffer),
"foo",
[]reflect.Type{})
ExpectThat(err, Error(HasSubstr("interfaces")))
ExpectThat(err, Error(HasSubstr("non-empty")))
}
func (t *GenerateTest) EmptyPackageName() {
err := generate.GenerateMockSource(
new(bytes.Buffer),
"",
[]reflect.Type{
reflect.TypeOf((*io.Reader)(nil)).Elem(),
})
ExpectThat(err, Error(HasSubstr("Package name")))
ExpectThat(err, Error(HasSubstr("non-empty")))
}
func (t *GenerateTest) NonInterfaceType() {
err := generate.GenerateMockSource(
new(bytes.Buffer),
"foo",
[]reflect.Type{
reflect.TypeOf((*io.Reader)(nil)).Elem(),
reflect.TypeOf(17),
reflect.TypeOf((*io.Writer)(nil)).Elem(),
})
ExpectThat(err, Error(HasSubstr("Invalid type")))
}