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helm/internal/test/test.go

97 lines
2.5 KiB

/*
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"
"io/ioutil"
"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)
}
}
chore: Spelling (#9410) * spelling: annotate Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: asserts Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: behavior Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: binary Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: contain Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: copied Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: dependency Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: depending Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: deprecated Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: doesn't Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: donot Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: github Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: inputting Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: iteration Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: jabberwocky Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: kubernetes Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: length Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: mismatch Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: multiple Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: nonexistent Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: outputs Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: panicking Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: plugins Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: parsing Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: porthos Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: regular Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: resource Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: repositories Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: something Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: strict Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: string Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: unknown Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
4 years ago
// 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 := ioutil.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 := ioutil.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 ioutil.WriteFile(filename, normalize(in), 0666)
}
func normalize(in []byte) []byte {
return bytes.Replace(in, []byte("\r\n"), []byte("\n"), -1)
}