91 lines
2.4 KiB
Go
91 lines
2.4 KiB
Go
package test
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import (
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"bytes"
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"flag"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"testing"
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"github.com/ian-howell/airshipadm/cmd"
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"github.com/ian-howell/airshipadm/pkg/kube"
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"k8s.io/client-go/kubernetes/fake"
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)
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// UpdateGolden writes out the golden files with the latest values, rather than failing the test.
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var shouldUpdateGolden = flag.Bool("update", false, "update golden files")
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const (
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testdataDir = "testdata"
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goldenDirSuffix = "GoldenOutput"
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goldenFileSuffix = ".golden"
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)
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type CmdTest struct {
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Name string
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Command string
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}
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func RunCmdTests(t *testing.T, tests []CmdTest) {
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t.Helper()
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for _, test := range tests {
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cmdOutput := executeCmd(t, test.Command)
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if *shouldUpdateGolden {
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updateGolden(t, test, cmdOutput)
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} else {
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assertEqualGolden(t, test, cmdOutput)
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}
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}
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}
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func executeCmd(t *testing.T, command string) []byte {
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var actual bytes.Buffer
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client := &kube.Client{Interface: fake.NewSimpleClientset()}
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// TODO(howell): switch to shellwords (or similar)
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args := strings.Fields(command)
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rootCmd, err := cmd.NewRootCmd(&actual, client, args)
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if err != nil {
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t.Fatalf(err.Error())
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}
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rootCmd.SetArgs(args)
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if err := rootCmd.Execute(); err != nil {
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t.Fatalf(err.Error())
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}
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return actual.Bytes()
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}
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func updateGolden(t *testing.T, test CmdTest, actual []byte) {
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goldenDir := filepath.Join(testdataDir, t.Name()+goldenDirSuffix)
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if err := os.MkdirAll(goldenDir, 0775); err != nil {
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t.Fatalf("failed to create golden directory %s: %s", goldenDir, err)
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}
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t.Logf("Created %s", goldenDir)
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goldenFilePath := filepath.Join(goldenDir, test.Name+goldenFileSuffix)
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t.Logf("updating golden file: %s", goldenFilePath)
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if err := ioutil.WriteFile(goldenFilePath, normalize(actual), 0666); err != nil {
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t.Fatalf("failed to update golden file: %s", err)
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}
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}
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func assertEqualGolden(t *testing.T, test CmdTest, actual []byte) {
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goldenDir := filepath.Join(testdataDir, t.Name()+goldenDirSuffix)
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goldenFilePath := filepath.Join(goldenDir, test.Name+goldenFileSuffix)
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golden, err := ioutil.ReadFile(goldenFilePath)
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if err != nil {
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t.Fatalf("failed while reading golden file: %s", err)
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}
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if !bytes.Equal(actual, golden) {
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errFmt := "output does not match golden file: %s\nEXPECTED:\n%s\nGOT:\n%s"
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t.Errorf(errFmt, goldenFilePath, string(golden), string(actual))
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}
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}
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func normalize(in []byte) []byte {
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return bytes.Replace(in, []byte("\r\n"), []byte("\n"), -1)
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}
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