helm/internal/test/test.go
Matt Farina 4e7e939f19
Updating the Go version in go.mod
At this time both Go 1.19 and 1.20 are supported. The version
specified in the go.mod file is the minimum version we expect Helm
to be compiled against. This is the oldest supported version to
support environments where others compile Helm. The Helm project
is using Go 1.20 to build Helm itself.

Updating to Go 1.19 also includes dealing with io/ioutil
deprecation and some additional linting issues around staticcheck.
All the staticcheck issues were in test files so linting was
skipped for those.

Signed-off-by: Matt Farina <matt.farina@suse.com>
2023-03-22 11:52:30 -04:00

96 lines
2.5 KiB
Go

/*
Copyright The Helm Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package test
import (
"bytes"
"flag"
"os"
"path/filepath"
"github.com/pkg/errors"
)
// UpdateGolden writes out the golden files with the latest values, rather than failing the test.
var updateGolden = flag.Bool("update", false, "update golden files")
// TestingT describes a testing object compatible with the critical functions from the testing.T type
type TestingT interface {
Fatal(...interface{})
Fatalf(string, ...interface{})
HelperT
}
// HelperT describes a test with a helper function
type HelperT interface {
Helper()
}
// AssertGoldenString asserts that the given string matches the contents of the given file.
func AssertGoldenString(t TestingT, actual, filename string) {
t.Helper()
if err := compare([]byte(actual), path(filename)); err != nil {
t.Fatalf("%v\n", err)
}
}
// AssertGoldenFile asserts that the content of the actual file matches the contents of the expected file
func AssertGoldenFile(t TestingT, actualFileName string, expectedFilename string) {
t.Helper()
actual, err := os.ReadFile(actualFileName)
if err != nil {
t.Fatalf("%v", err)
}
AssertGoldenString(t, string(actual), expectedFilename)
}
func path(filename string) string {
if filepath.IsAbs(filename) {
return filename
}
return filepath.Join("testdata", filename)
}
func compare(actual []byte, filename string) error {
actual = normalize(actual)
if err := update(filename, actual); err != nil {
return err
}
expected, err := os.ReadFile(filename)
if err != nil {
return errors.Wrapf(err, "unable to read testdata %s", filename)
}
expected = normalize(expected)
if !bytes.Equal(expected, actual) {
return errors.Errorf("does not match golden file %s\n\nWANT:\n'%s'\n\nGOT:\n'%s'", filename, expected, actual)
}
return nil
}
func update(filename string, in []byte) error {
if !*updateGolden {
return nil
}
return os.WriteFile(filename, normalize(in), 0666)
}
func normalize(in []byte) []byte {
return bytes.Replace(in, []byte("\r\n"), []byte("\n"), -1)
}