Change validation tests such that they accept valid values from a

provided TZ database and fail on any other values

pkg/apis/batch/validation/validation_test.go

@@ -17,6 +17,10 @@ limitations under the License.
 package validation
 
 import (
+	"archive/zip"
+	"io"
+	"os"
+	"path/filepath"
 	"runtime"
 	"strings"
 	"testing"
@@ -36,11 +40,10 @@ var (
 	timeZoneEmpty      = ""
 	timeZoneLocal      = "LOCAL"
 	timeZoneUTC        = "UTC"
-	timeZoneCorrectCasing = "America/New_York"
+	timeZoneCorrect    = "Continent/Zone"
-	timeZoneBadCasing     = "AMERICA/new_york"
+	timeZoneBadPrefix  = " Continent/Zone"
-	timeZoneBadPrefix     = " America/New_York"
+	timeZoneBadSuffix  = "Continent/Zone "
-	timeZoneBadSuffix     = "America/New_York "
+	timeZoneBadName    = "Continent/InvalidZone"
-	timeZoneBadName       = "America/New York"
 	timeZoneEmptySpace = " "
 )
 
@@ -882,6 +885,12 @@ func TestValidateCronJob(t *testing.T) {
 	validPodTemplateSpec := getValidPodTemplateSpecForGenerated(getValidGeneratedSelector())
 	validPodTemplateSpec.Labels = map[string]string{}
 
+	zoneDir := t.TempDir()
+	if err := setupFakeTimeZoneDatabase(zoneDir); err != nil {
+		t.Fatalf("Unexpected error setting up fake timezone database: %v", err)
+	}
+	t.Setenv("ZONEINFO", zoneDir)
+
 	successCases := map[string]batch.CronJob{
 		"basic scheduled job": {
 			ObjectMeta: metav1.ObjectMeta{
@@ -915,7 +924,7 @@ func TestValidateCronJob(t *testing.T) {
 				},
 			},
 		},
-		"correct timeZone value casing": {
+		"correct timeZone value": {
 			ObjectMeta: metav1.ObjectMeta{
 				Name:      "mycronjob",
 				Namespace: metav1.NamespaceDefault,
@@ -923,7 +932,7 @@ func TestValidateCronJob(t *testing.T) {
 			},
 			Spec: batch.CronJobSpec{
 				Schedule:          "0 * * * *",
-				TimeZone:          &timeZoneCorrectCasing,
+				TimeZone:          &timeZoneCorrect,
 				ConcurrencyPolicy: batch.AllowConcurrent,
 				JobTemplate: batch.JobTemplateSpec{
 					Spec: batch.JobSpec{
@@ -934,6 +943,7 @@ func TestValidateCronJob(t *testing.T) {
 		},
 	}
 	for k, v := range successCases {
+		t.Run(k, func(t *testing.T) {
 			if errs := ValidateCronJobCreate(&v, corevalidation.PodValidationOptions{}); len(errs) != 0 {
 				t.Errorf("expected success for %s: %v", k, errs)
 			}
@@ -945,6 +955,7 @@ func TestValidateCronJob(t *testing.T) {
 			if errs := ValidateCronJobUpdate(&v, &v, corevalidation.PodValidationOptions{}); len(errs) != 0 {
 				t.Errorf("expected success for %s: %v", k, errs)
 			}
+		})
 	}
 
 	negative := int32(-1)
@@ -1034,7 +1045,7 @@ func TestValidateCronJob(t *testing.T) {
 				},
 			},
 		},
-		"spec.timeZone: Invalid value: \" America/New_York\": unknown time zone  America/New_York": {
+		"spec.timeZone: Invalid value: \" Continent/Zone\": unknown time zone  Continent/Zone": {
 			ObjectMeta: metav1.ObjectMeta{
 				Name:      "mycronjob",
 				Namespace: metav1.NamespaceDefault,
@@ -1051,7 +1062,7 @@ func TestValidateCronJob(t *testing.T) {
 				},
 			},
 		},
-		"spec.timeZone: Invalid value: \"America/New_York \": unknown time zone America/New_York ": {
+		"spec.timeZone: Invalid value: \"Continent/Zone \": unknown time zone Continent/Zone ": {
 			ObjectMeta: metav1.ObjectMeta{
 				Name:      "mycronjob",
 				Namespace: metav1.NamespaceDefault,
@@ -1068,7 +1079,7 @@ func TestValidateCronJob(t *testing.T) {
 				},
 			},
 		},
-		"spec.timeZone: Invalid value: \"America/New York\": unknown time zone  America/New York": {
+		"spec.timeZone: Invalid value: \"Continent/InvalidZone\": unknown time zone  Continent/InvalidZone": {
 			ObjectMeta: metav1.ObjectMeta{
 				Name:      "mycronjob",
 				Namespace: metav1.NamespaceDefault,
@@ -1314,8 +1325,7 @@ func TestValidateCronJob(t *testing.T) {
 				},
 			},
 		},
-	}
+		"spec.jobTemplate.spec.ttlSecondsAfterFinished:must be greater than or equal to 0": {
-	errorCases["spec.jobTemplate.spec.ttlSecondsAfterFinished:must be greater than or equal to 0"] = batch.CronJob{
 			ObjectMeta: metav1.ObjectMeta{
 				Name:      "mycronjob",
 				Namespace: metav1.NamespaceDefault,
@@ -1331,29 +1341,11 @@ func TestValidateCronJob(t *testing.T) {
 					},
 				},
 			},
-	}
-	if runtime.GOOS != "darwin" {
-		// Skip this error case on darwin, see https://github.com/golang/go/issues/21512
-		errorCases["spec.timeZone: Invalid value: \"AMERICA/new_york\": unknown time zone AMERICA/new_york"] = batch.CronJob{
-			ObjectMeta: metav1.ObjectMeta{
-				Name:      "mycronjob",
-				Namespace: metav1.NamespaceDefault,
-				UID:       types.UID("1a2b3c"),
 		},
-			Spec: batch.CronJobSpec{
-				Schedule:          "0 * * * *",
-				TimeZone:          &timeZoneBadCasing,
-				ConcurrencyPolicy: batch.AllowConcurrent,
-				JobTemplate: batch.JobTemplateSpec{
-					Spec: batch.JobSpec{
-						Template: validPodTemplateSpec,
-					},
-				},
-			},
-		}
 	}
 
 	for k, v := range errorCases {
+		t.Run(k, func(t *testing.T) {
 			errs := ValidateCronJobCreate(&v, corevalidation.PodValidationOptions{})
 			if len(errs) == 0 {
 				t.Errorf("expected failure for %s", k)
@@ -1377,7 +1369,7 @@ func TestValidateCronJob(t *testing.T) {
 			errs = ValidateCronJobUpdate(&newSpec, &oldSpec, corevalidation.PodValidationOptions{})
 			if len(errs) == 0 {
 				if k == "metadata.name: must be no more than 52 characters" {
-				continue
+					return
 				}
 				t.Errorf("expected failure for %s", k)
 			} else {
@@ -1387,9 +1379,46 @@ func TestValidateCronJob(t *testing.T) {
 					t.Errorf("unexpected error: %v, expected: %s", err, k)
 				}
 			}
+		})
 	}
 }
 
+// Sets up fake timezone database in a zoneDir directory with a single valid
+// time zone called "Continent/Zone" by copying UTC metadata from golang's
+// built-in databse. Returns an error in case of problems.
+func setupFakeTimeZoneDatabase(zoneDir string) error {
+	reader, err := zip.OpenReader(runtime.GOROOT() + "/lib/time/zoneinfo.zip")
+	if err != nil {
+		return err
+	}
+	defer reader.Close()
+
+	if err := os.Mkdir(filepath.Join(zoneDir, "Continent"), os.ModePerm); err != nil {
+		return err
+	}
+	zoneFile, err := os.OpenFile(filepath.Join(zoneDir, "Continent", "Zone"), os.O_RDWR|os.O_TRUNC|os.O_CREATE, 0666)
+	if err != nil {
+		return err
+	}
+	defer zoneFile.Close()
+
+	for _, file := range reader.File {
+		if file.Name != "UTC" {
+			continue
+		}
+		rc, err := file.Open()
+		if err != nil {
+			return err
+		}
+		if _, err := io.Copy(zoneFile, rc); err != nil {
+			return err
+		}
+		rc.Close()
+		break
+	}
+	return nil
+}
+
 func TestValidateCronJobSpec(t *testing.T) {
 	validPodTemplateSpec := getValidPodTemplateSpecForGenerated(getValidGeneratedSelector())
 	validPodTemplateSpec.Labels = map[string]string{}