Consolidate test harness to one package.

api/krusty/accumulation_test.go

@@ -8,13 +8,13 @@ import (
 	"strings"
 	"testing"
 
-	"sigs.k8s.io/kustomize/api/konfig"
-
 	. "sigs.k8s.io/kustomize/api/internal/target"
+	"sigs.k8s.io/kustomize/api/konfig"
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 func TestTargetMustHaveKustomizationFile(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteF("/app/service.yaml", `
 apiVersion: v1
 kind: Service
@@ -37,7 +37,7 @@ metadata:
 }
 
 func TestTargetMustHaveOnlyOneKustomizationFile(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	for _, n := range konfig.RecognizedKustomizationFileNames() {
 		th.WriteF(filepath.Join("/app", n), `
 apiVersion: kustomize.config.k8s.io/v1beta1
@@ -54,7 +54,7 @@ kind: Kustomization
 }
 
 func TestBaseMustHaveKustomizationFile(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 resources:
 - base
@@ -80,7 +80,7 @@ spec:
 }
 
 func TestResourceNotFound(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 resources:
 - deployment.yaml

api/krusty/baseandoverlaymedium_test.go

@@ -5,9 +5,11 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
-func writeMediumBase(th testingHarness) {
+func writeMediumBase(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 namePrefix: baseprefix-
 commonLabels:
@@ -57,7 +59,7 @@ spec:
 }
 
 func TestMediumBase(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeMediumBase(th)
 	m := th.Run("/app/base", th.MakeDefaultOptions())
 	th.AssertActualEqualsExpected(m, `
@@ -111,7 +113,7 @@ spec:
 }
 
 func TestMediumOverlay(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeMediumBase(th)
 	th.WriteK("/app/overlay", `
 namePrefix: test-infra-

api/krusty/baseandoverlaysmall_test.go

@@ -8,11 +8,12 @@ import (
 	"testing"
 
 	. "sigs.k8s.io/kustomize/api/krusty"
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 	"sigs.k8s.io/kustomize/api/types"
 )
 
 func TestOrderPreserved(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 namePrefix: b-
 resources:
@@ -99,7 +100,7 @@ metadata:
 }
 
 func TestBaseInResourceList(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/prod", `
 namePrefix: b-
 resources:
@@ -131,7 +132,7 @@ spec:
 `)
 }
 
-func writeSmallBase(th testingHarness) {
+func writeSmallBase(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 namePrefix: a-
 commonLabels:
@@ -169,7 +170,7 @@ spec:
 }
 
 func TestSmallBase(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeSmallBase(th)
 	m := th.Run("/app/base", th.MakeDefaultOptions())
 	th.AssertActualEqualsExpected(m, `
@@ -209,7 +210,7 @@ spec:
 }
 
 func TestSmallOverlay(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeSmallBase(th)
 	th.WriteK("/app/overlay", `
 namePrefix: b-
@@ -284,7 +285,7 @@ spec:
 }
 
 func TestSharedPatchDisAllowed(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeSmallBase(th)
 	th.WriteK("/app/overlay", `
 commonLabels:
@@ -315,7 +316,7 @@ spec:
 }
 
 func TestSharedPatchAllowed(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeSmallBase(th)
 	th.WriteK("/app/overlay", `
 commonLabels:
@@ -381,7 +382,7 @@ spec:
 }
 
 func TestSmallOverlayJSONPatch(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeSmallBase(th)
 	th.WriteK("/app/overlay", `
 resources:

api/krusty/basereusenameprefix_test.go

@@ -5,6 +5,8 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 // Here is a structure of a kustomization of two components, component1
@@ -38,7 +40,7 @@ import (
 // ├── kustomization.yaml
 
 func TestBaseReuseNameConflict(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/component1/base", `
 resources:
   - ../../shared

api/krusty/chartinflatorplugin_test.go

@@ -11,7 +11,7 @@ import (
 	"regexp"
 	"testing"
 
-	"sigs.k8s.io/kustomize/api/testutils/kusttest"
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 // This is an example of using a helm chart as a base,
@@ -34,7 +34,7 @@ func TestChartInflatorPlugin(t *testing.T) {
 	tc.PrepExecPlugin(
 		"someteam.example.com", "v1", "ChartInflator")
 
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 generators:
 - chartInflator.yaml

api/krusty/complexcomposition_test.go

@@ -8,6 +8,7 @@ import (
 	"testing"
 
 	. "sigs.k8s.io/kustomize/api/krusty"
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 	"sigs.k8s.io/kustomize/api/types"
 )
 
@@ -25,7 +26,7 @@ spec:
     app: my-app
 `
 
-func writeStatefulSetBase(th testingHarness) {
+func writeStatefulSetBase(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 resources:
 - statefulset.yaml
@@ -54,7 +55,7 @@ spec:
 `)
 }
 
-func writeHTTPSOverlay(th testingHarness) {
+func writeHTTPSOverlay(th kusttest_test.Harness) {
 	th.WriteK("/app/https", `
 resources:
 - ../base
@@ -73,7 +74,7 @@ spec:
 `)
 }
 
-func writeHTTPSTransformerRaw(th testingHarness) {
+func writeHTTPSTransformerRaw(th kusttest_test.Harness) {
 	th.WriteF("/app/https/service/https-svc.yaml", httpsService)
 	th.WriteF("/app/https/transformer/transformer.yaml", `
 apiVersion: builtin
@@ -95,7 +96,7 @@ patch: |-
 `)
 }
 
-func writeHTTPSTransformerBase(th testingHarness) {
+func writeHTTPSTransformerBase(th kusttest_test.Harness) {
 	th.WriteK("/app/https/service", `
 resources:
 - https-svc.yaml
@@ -107,7 +108,7 @@ resources:
 	writeHTTPSTransformerRaw(th)
 }
 
-func writeConfigFromEnvOverlay(th testingHarness) {
+func writeConfigFromEnvOverlay(th kusttest_test.Harness) {
 	th.WriteK("/app/config", `
 resources:
 - ../base
@@ -136,7 +137,7 @@ spec:
 `)
 }
 
-func writeConfigFromEnvTransformerRaw(th testingHarness) {
+func writeConfigFromEnvTransformerRaw(th kusttest_test.Harness) {
 	th.WriteF("/app/config/map/generator.yaml", `
 apiVersion: builtin
 kind: ConfigMapGenerator
@@ -171,7 +172,7 @@ patch: |-
               name: my-config
 `)
 }
-func writeConfigFromEnvTransformerBase(th testingHarness) {
+func writeConfigFromEnvTransformerBase(th kusttest_test.Harness) {
 	th.WriteK("/app/config/map", `
 resources:
 - generator.yaml
@@ -183,7 +184,7 @@ resources:
 	writeConfigFromEnvTransformerRaw(th)
 }
 
-func writeTolerationsOverlay(th testingHarness) {
+func writeTolerationsOverlay(th kusttest_test.Harness) {
 	th.WriteK("/app/tolerations", `
 resources:
 - ../base
@@ -205,7 +206,7 @@ spec:
 `)
 }
 
-func writeTolerationsTransformerRaw(th testingHarness) {
+func writeTolerationsTransformerRaw(th kusttest_test.Harness) {
 	th.WriteF("/app/tolerations/transformer.yaml", `
 apiVersion: builtin
 kind: PatchTransformer
@@ -231,7 +232,7 @@ patch: |-
 `)
 }
 
-func writeTolerationsTransformerBase(th testingHarness) {
+func writeTolerationsTransformerBase(th kusttest_test.Harness) {
 	th.WriteK("/app/tolerations", `
 resources:
 - transformer.yaml
@@ -239,7 +240,7 @@ resources:
 	writeTolerationsTransformerRaw(th)
 }
 
-func writeStorageOverlay(th testingHarness) {
+func writeStorageOverlay(th kusttest_test.Harness) {
 	th.WriteK("/app/storage", `
 resources:
 - ../base
@@ -256,7 +257,7 @@ patchesJson6902:
 `)
 }
 
-func writeStorageTransformerRaw(th testingHarness) {
+func writeStorageTransformerRaw(th kusttest_test.Harness) {
 	th.WriteF("/app/storage/transformer.yaml", `
 apiVersion: builtin
 kind: PatchTransformer
@@ -272,7 +273,7 @@ patch: |-
 `)
 }
 
-func writeStorageTransformerBase(th testingHarness) {
+func writeStorageTransformerBase(th kusttest_test.Harness) {
 	th.WriteK("/app/storage", `
 resources:
 - transformer.yaml
@@ -280,14 +281,14 @@ resources:
 	writeStorageTransformerRaw(th)
 }
 
-func writePatchingOverlays(th testingHarness) {
+func writePatchingOverlays(th kusttest_test.Harness) {
 	writeStorageOverlay(th)
 	writeConfigFromEnvOverlay(th)
 	writeTolerationsOverlay(th)
 	writeHTTPSOverlay(th)
 }
 
-func writePatchingTransformersRaw(th testingHarness) {
+func writePatchingTransformersRaw(th kusttest_test.Harness) {
 	writeStorageTransformerRaw(th)
 	writeConfigFromEnvTransformerRaw(th)
 	writeTolerationsTransformerRaw(th)
@@ -310,7 +311,7 @@ func writePatchingTransformersRaw(th testingHarness) {
 // must be self-contained, i.e. the config may not have fields that
 // refer to local files, since those files won't be present when
 // the plugin is instantiated and used.
-func writePatchingTransformerBases(th testingHarness) {
+func writePatchingTransformerBases(th kusttest_test.Harness) {
 	writeStorageTransformerBase(th)
 	writeConfigFromEnvTransformerBase(th)
 	writeTolerationsTransformerBase(th)
@@ -353,7 +354,7 @@ func writePatchingTransformerBases(th testingHarness) {
 //   - prod: Combines the config, tolerations and https intermediate overlays.
 
 func TestComplexComposition_Dev_Failure(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeStatefulSetBase(th)
 	writePatchingOverlays(th)
 	th.WriteK("/app/dev", `
@@ -405,7 +406,7 @@ metadata:
 `
 
 func TestComplexComposition_Dev_SuccessWithRawTransformers(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeStatefulSetBase(th)
 	writePatchingTransformersRaw(th)
 	th.WriteK("/app/dev", `
@@ -426,7 +427,7 @@ transformers:
 }
 
 func TestComplexComposition_Dev_SuccessWithBaseTransformers(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeStatefulSetBase(th)
 	writePatchingTransformerBases(th)
 	th.WriteK("/app/dev", `
@@ -443,7 +444,7 @@ transformers:
 }
 
 func TestComplexComposition_Prod_Failure(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeStatefulSetBase(th)
 	writePatchingOverlays(th)
 	th.WriteK("/app/prod", `
@@ -512,7 +513,7 @@ metadata:
 `
 
 func TestComplexComposition_Prod_SuccessWithRawTransformers(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeStatefulSetBase(th)
 	writePatchingTransformersRaw(th)
 	th.WriteK("/app/prod", `
@@ -535,7 +536,7 @@ transformers:
 }
 
 func TestComplexComposition_Prod_SuccessWithBaseTransformers(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeStatefulSetBase(th)
 	writePatchingTransformerBases(th)
 	th.WriteK("/app/prod", `

api/krusty/configmaps_test.go

@@ -5,12 +5,14 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 // Generate a Secret and a ConfigMap from the same data
 // to compare the result.
 func TestGeneratorBasics(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 namePrefix: blah-
 configMapGenerator:
@@ -107,7 +109,7 @@ type: Opaque
 
 // TODO: These should be errors instead.
 func TestGeneratorRepeatsInKustomization(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 namePrefix: blah-
 configMapGenerator:
@@ -159,7 +161,7 @@ metadata:
 }
 
 func TestGeneratorOverlays(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base1", `
 namePrefix: p1-
 configMapGenerator:
@@ -231,7 +233,7 @@ metadata:
 
 func TestConfigMapGeneratorMergeNamePrefix(t *testing.T) {
 
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 configMapGenerator:
 - name: cm

api/krusty/crd_test.go

@@ -5,9 +5,11 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
-func writeBaseWithCrd(th testingHarness) {
+func writeBaseWithCrd(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
@@ -223,7 +225,7 @@ data:
 }
 
 func TestCrdBase(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeBaseWithCrd(th)
 	m := th.Run("/app/base", th.MakeDefaultOptions())
 	th.AssertActualEqualsExpected(m, `
@@ -254,7 +256,7 @@ spec:
 }
 
 func TestCrdWithOverlay(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeBaseWithCrd(th)
 	th.WriteK("/app/overlay", `
 apiVersion: kustomize.config.k8s.io/v1beta1
@@ -303,7 +305,7 @@ spec:
 }
 
 func TestCrdWithContainers(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/crd/containers", `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization

api/krusty/customconfig_test.go

@@ -5,9 +5,11 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
-func makeBaseReferencingCustomConfig(th testingHarness) {
+func makeBaseReferencingCustomConfig(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 namePrefix: x-
 commonLabels:
@@ -72,7 +74,7 @@ spec:
 }
 
 func TestCustomConfig(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeBaseReferencingCustomConfig(th)
 	th.WriteLegacyConfigs("/app/base/config/defaults.yaml")
 	th.WriteF("/app/base/config/custom.yaml", `
@@ -135,7 +137,7 @@ spec:
 }
 
 func TestCustomConfigWithDefaultOverspecification(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeBaseReferencingCustomConfig(th)
 	th.WriteLegacyConfigs("/app/base/config/defaults.yaml")
 	// Specifying namePrefix here conflicts with (is the same as)
@@ -203,7 +205,7 @@ spec:
 }
 
 func TestFixedBug605_BaseCustomizationAvailableInOverlay(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeBaseReferencingCustomConfig(th)
 	th.WriteLegacyConfigs("/app/base/config/defaults.yaml")
 	th.WriteF("/app/base/config/custom.yaml", `

api/krusty/customconfigofbuiltinplugin_test.go

@@ -19,7 +19,7 @@ func TestCustomNamePrefixer(t *testing.T) {
 	tc.BuildGoPlugin(
 		"builtin", "", "PrefixSuffixTransformer")
 
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 resources:
 - deployment.yaml

api/krusty/customconfigreusable_test.go

@@ -24,7 +24,7 @@ func TestReusableCustomTransformers(t *testing.T) {
 	tc.BuildGoPlugin(
 		"builtin", "", "LabelTransformer")
 
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 
 	// First write three custom configurations for builtin plugins.
 

api/krusty/diamondcomposition_test.go

@@ -58,7 +58,7 @@ spec:
 `
 const patchJsonRestartPolicy = `[{"op": "add", "path": "/spec/template/spec/restartPolicy", "value": "Always"}]`
 
-func writeDeploymentBase(th testingHarness) {
+func writeDeploymentBase(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 resources:
 - deployment.yaml
@@ -79,7 +79,7 @@ spec:
 `)
 }
 
-func writeProbeOverlay(th testingHarness) {
+func writeProbeOverlay(th kusttest_test.Harness) {
 	th.WriteK("/app/probe", `
 resources:
 - ../base
@@ -89,7 +89,7 @@ patchesStrategicMerge:
 	th.WriteF("/app/probe/dep-patch.yaml", patchAddProbe)
 }
 
-func writeDNSOverlay(th testingHarness) {
+func writeDNSOverlay(th kusttest_test.Harness) {
 	th.WriteK("/app/dns", `
 resources:
 - ../base
@@ -99,7 +99,7 @@ patchesStrategicMerge:
 	th.WriteF("/app/dns/dep-patch.yaml", patchDnsPolicy)
 }
 
-func writeRestartOverlay(th testingHarness) {
+func writeRestartOverlay(th kusttest_test.Harness) {
 	th.WriteK("/app/restart", `
 resources:
 - ../base
@@ -123,7 +123,7 @@ patchesStrategicMerge:
 //              base
 //
 func TestIssue1251_CompositeDiamond_Failure(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeDeploymentBase(th)
 	writeProbeOverlay(th)
 	writeDNSOverlay(th)
@@ -168,7 +168,7 @@ spec:
 // This test reuses some methods from TestIssue1251_CompositeDiamond,
 // but overwrites the kustomization files in the overlays.
 func TestIssue1251_Patches_Overlayed(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeDeploymentBase(th)
 
 	// probe overlays base.
@@ -197,7 +197,7 @@ patchesStrategicMerge:
 }
 
 func TestIssue1251_Patches_Local(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeDeploymentBase(th)
 
 	th.WriteK("/app/composite", `
@@ -216,7 +216,7 @@ patchesStrategicMerge:
 	th.AssertActualEqualsExpected(m, expectedPatchedDeployment)
 }
 
-func definePatchDirStructure(th testingHarness) {
+func definePatchDirStructure(th kusttest_test.Harness) {
 	writeDeploymentBase(th)
 
 	th.WriteF("/app/patches/patchRestartPolicy.yaml", patchRestartPolicy)
@@ -226,7 +226,7 @@ func definePatchDirStructure(th testingHarness) {
 
 // Fails due to file load restrictor.
 func TestIssue1251_Patches_ProdVsDev_Failure(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	definePatchDirStructure(th)
 
 	th.WriteK("/app/prod", `
@@ -299,7 +299,7 @@ spec:
 // the kustomization root), opening the user to whatever
 // threat the load restrictor was meant to address.
 func TestIssue1251_Patches_ProdVsDev(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	definePatchDirStructure(th)
 
 	th.WriteK("/app/prod", `
@@ -315,7 +315,7 @@ patchesStrategicMerge:
 	m := th.Run("/app/prod", opts)
 	th.AssertActualEqualsExpected(m, prodDevMergeResult1)
 
-	th = makeTestHarness(t)
+	th = kusttest_test.MakeHarness(t)
 	definePatchDirStructure(th)
 
 	th.WriteK("/app/dev", `
@@ -337,7 +337,7 @@ func TestIssue1251_Plugins_ProdVsDev(t *testing.T) {
 	tc.BuildGoPlugin(
 		"builtin", "", "PatchJson6902Transformer")
 
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	defineTransformerDirStructure(th)
 	th.WriteK("/app/prod", `
 resources:
@@ -370,7 +370,7 @@ func TestIssue1251_Plugins_Local(t *testing.T) {
 	tc.BuildGoPlugin(
 		"builtin", "", "PatchJson6902Transformer")
 
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeDeploymentBase(th)
 
 	writeJsonTransformerPluginConfig(
@@ -393,7 +393,7 @@ transformers:
 }
 
 func writeJsonTransformerPluginConfig(
-	th testingHarness, path, name, patch string) {
+	th kusttest_test.Harness, path, name, patch string) {
 	th.WriteF(filepath.Join(path, name+"Config.yaml"),
 		fmt.Sprintf(`
 apiVersion: builtin
@@ -417,7 +417,7 @@ func TestIssue1251_Plugins_Bundled(t *testing.T) {
 	tc.BuildGoPlugin(
 		"builtin", "", "PatchJson6902Transformer")
 
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeDeploymentBase(th)
 
 	th.WriteK("/app/patches", `
@@ -443,7 +443,7 @@ transformers:
 	th.AssertActualEqualsExpected(m, expectedPatchedDeployment)
 }
 
-func defineTransformerDirStructure(th testingHarness) {
+func defineTransformerDirStructure(th kusttest_test.Harness) {
 	writeDeploymentBase(th)
 
 	th.WriteK("/app/patches/addDnsPolicy", `

api/krusty/diamonds_test.go

@@ -5,6 +5,8 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 // Here's a structure of two kustomizations,
@@ -28,7 +30,7 @@ import (
 //          \    |    /
 //             base
 //
-func writeDiamondBase(th testingHarness) {
+func writeDiamondBase(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 resources:
 - deploy.yaml
@@ -43,7 +45,7 @@ spec:
 `)
 }
 
-func writeKirk(th testingHarness) {
+func writeKirk(th kusttest_test.Harness) {
 	th.WriteK("/app/kirk", `
 namePrefix: kirk-
 resources:
@@ -70,7 +72,7 @@ data:
 `)
 }
 
-func writeSpock(th testingHarness) {
+func writeSpock(th kusttest_test.Harness) {
 	th.WriteK("/app/spock", `
 namePrefix: spock-
 resources:
@@ -88,7 +90,7 @@ spec:
 `)
 }
 
-func writeBones(th testingHarness) {
+func writeBones(th kusttest_test.Harness) {
 	th.WriteK("/app/bones", `
 namePrefix: bones-
 resources:
@@ -106,7 +108,7 @@ spec:
 `)
 }
 
-func writeTenants(th testingHarness) {
+func writeTenants(th kusttest_test.Harness) {
 	th.WriteK("/app/tenants", `
 namePrefix: t-
 resources:
@@ -137,7 +139,7 @@ data:
 }
 
 func TestBasicDiamond(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeDiamondBase(th)
 	writeKirk(th)
 	writeSpock(th)

api/krusty/directoryarrangement_test.go

@@ -5,10 +5,12 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 func TestIssue596AllowDirectoriesThatAreSubstringsOfEachOther(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", "")
 	th.WriteK("/app/overlays/aws", `
 resources:

api/krusty/disablenamesuffix_test.go

@@ -9,6 +9,7 @@ import (
 
 	"sigs.k8s.io/kustomize/api/resmap"
 	"sigs.k8s.io/kustomize/api/resource"
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 func findSecret(m resmap.ResMap) *resource.Resource {
@@ -21,7 +22,7 @@ func findSecret(m resmap.ResMap) *resource.Resource {
 }
 
 func TestDisableNameSuffixHash(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	const kustomizationContent = `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization

api/krusty/extendedpatch_test.go

@@ -5,9 +5,11 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
-func makeCommonFileForExtendedPatchTest(th testingHarness) {
+func makeCommonFileForExtendedPatchTest(th kusttest_test.Harness) {
 	th.WriteF("/app/base/deployment.yaml", `
 apiVersion: apps/v1beta2
 kind: Deployment
@@ -87,7 +89,7 @@ spec:
 }
 
 func TestExtendedPatchNameSelector(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -189,7 +191,7 @@ spec:
 }
 
 func TestExtendedPatchGvkSelector(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -291,7 +293,7 @@ spec:
 }
 
 func TestExtendedPatchLabelSelector(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -393,7 +395,7 @@ spec:
 }
 
 func TestExtendedPatchNameGvkSelector(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -494,7 +496,7 @@ spec:
 }
 
 func TestExtendedPatchNameLabelSelector(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -597,7 +599,7 @@ spec:
 }
 
 func TestExtendedPatchGvkLabelSelector(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -698,7 +700,7 @@ spec:
 }
 
 func TestExtendedPatchNameGvkLabelSelector(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -800,7 +802,7 @@ spec:
 }
 
 func TestExtendedPatchNoMatch(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -898,7 +900,7 @@ spec:
 }
 
 func TestExtendedPatchWithoutTarget(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -996,7 +998,7 @@ spec:
 }
 
 func TestExtendedPatchNoMatchMultiplePatch(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -1098,7 +1100,7 @@ spec:
 }
 
 func TestExtendedPatchMultiplePatchOverlapping(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForExtendedPatchTest(th)
 	th.WriteK("/app/base", `
 resources:

api/krusty/generatormergeandreplace_test.go

@@ -6,10 +6,12 @@ package krusty_test
 import (
 	"strings"
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 func TestSimpleBase(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
@@ -146,7 +148,7 @@ spec:
 `)
 }
 
-func makeBaseWithGenerators(th testingHarness) {
+func makeBaseWithGenerators(th kusttest_test.Harness) {
 	th.WriteK("/app", `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
@@ -212,7 +214,7 @@ spec:
 }
 
 func TestBaseWithGeneratorsAlone(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeBaseWithGenerators(th)
 	m := th.Run("/app", th.MakeDefaultOptions())
 	th.AssertActualEqualsExpected(m, `
@@ -303,7 +305,7 @@ type: Opaque
 }
 
 func TestMergeAndReplaceGenerators(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeBaseWithGenerators(th)
 	th.WriteF("/overlay/deployment.yaml", `
 apiVersion: apps/v1beta2
@@ -458,7 +460,7 @@ metadata:
 }
 
 func TestGeneratingIntoNamespaces(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 configMapGenerator:
 - name: test
@@ -524,7 +526,7 @@ type: Opaque
 // Valid that conflict is detected is the name are identical
 // and namespace left to default
 func TestConfigMapGeneratingIntoSameNamespace(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 configMapGenerator:
 - name: test
@@ -547,7 +549,7 @@ configMapGenerator:
 // Valid that conflict is detected is the name are identical
 // and namespace left to default
 func TestSecretGeneratingIntoSameNamespace(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 secretGenerator:
 - name: test

api/krusty/generatoroptions_test.go

@@ -5,10 +5,12 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 func TestSecretGenerator(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 secretGenerator:
 - name: bob
@@ -44,7 +46,7 @@ type: Opaque
 }
 
 func TestGeneratorOptionsWithBases(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization

api/krusty/inlinepatch_test.go

@@ -5,9 +5,11 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
-func makeResourcesForPatchTest(th testingHarness) {
+func makeResourcesForPatchTest(th kusttest_test.Harness) {
 	th.WriteF("/app/base/deployment.yaml", `
 apiVersion: apps/v1
 kind: Deployment
@@ -37,7 +39,7 @@ spec:
 }
 
 func TestStrategicMergePatchInline(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeResourcesForPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -86,7 +88,7 @@ spec:
 }
 
 func TestJSONPatchInline(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeResourcesForPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -133,7 +135,7 @@ spec:
 }
 
 func TestExtendedPatchInlineJSON(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeResourcesForPatchTest(th)
 	th.WriteK("/app/base", `
 resources:
@@ -178,7 +180,7 @@ spec:
 }
 
 func TestExtendedPatchInlineYAML(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeResourcesForPatchTest(th)
 	th.WriteK("/app/base", `
 resources:

api/krusty/multiplepatch_test.go

@@ -6,9 +6,11 @@ package krusty_test
 import (
 	"strings"
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
-func makeCommonFileForMultiplePatchTest(th testingHarness) {
+func makeCommonFileForMultiplePatchTest(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
@@ -87,7 +89,7 @@ configMapGenerator:
 }
 
 func TestMultiplePatchesNoConflict(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForMultiplePatchTest(th)
 	th.WriteF("/app/overlay/staging/deployment-patch1.yaml", `
 apiVersion: apps/v1beta2
@@ -228,7 +230,7 @@ metadata:
 }
 
 func TestMultiplePatchesWithConflict(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForMultiplePatchTest(th)
 	th.WriteF("/app/overlay/staging/deployment-patch1.yaml", `
 apiVersion: apps/v1beta2
@@ -320,7 +322,7 @@ spec:
 	}
 	for _, c := range cases {
 		t.Run(c.name, func(t *testing.T) {
-			th := makeTestHarness(t)
+			th := kusttest_test.MakeHarness(t)
 
 			makeCommonFileForMultiplePatchTest(th)
 			th.WriteF("/app/overlay/staging/deployment-patch1.yaml", c.patch1)
@@ -418,7 +420,7 @@ metadata:
 }
 
 func TestMultiplePatchesBothWithPatchDeleteDirective(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeCommonFileForMultiplePatchTest(th)
 	th.WriteF("/app/overlay/staging/deployment-patch1.yaml", `
 apiVersion: apps/v1beta2

api/krusty/namespacedgenerators_test.go

@@ -5,10 +5,12 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 func TestNamespacedGenerator(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
@@ -71,7 +73,7 @@ type: Opaque
 }
 
 func TestNamespacedGeneratorWithOverlays(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 namespace: base
 

api/krusty/namespaces_test.go

@@ -6,10 +6,12 @@ package krusty_test
 import (
 	"strings"
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 func TestNamespacedSecrets(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteF("/app/secrets.yaml", `
 apiVersion: v1
 kind: Secret
@@ -93,7 +95,7 @@ rules:
 // PrefixSuffixTransformer and namereference transformers are
 // able to deal with simultaneous change of namespace and name.
 func TestNameAndNsTransformation(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 
 	th.WriteK("/nameandns", `
 namePrefix: p1-
@@ -463,7 +465,7 @@ spec:
 // using the same name in different namespaces are treated as ambiguous if the namespace is
 // not specified
 func TestVariablesAmbiguous(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/namespaceNeedInVar/myapp", namespaceNeedInVarMyApp)
 	th.WriteF("/namespaceNeedInVar/myapp/elasticsearch-dev-service.yaml", namespaceNeedInVarDevResources)
 	th.WriteF("/namespaceNeedInVar/myapp/elasticsearch-test-service.yaml", namespaceNeedInVarTestResources)
@@ -520,7 +522,7 @@ vars:
 // to TestVariablesAmbiguous problem. It requires to separate the variables
 // and resources into multiple kustomization context/folders instead of one.
 func TestVariablesAmbiguousWorkaround(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/namespaceNeedInVar/dev", namespaceNeedInVarDevFolder)
 	th.WriteF("/namespaceNeedInVar/dev/elasticsearch-dev-service.yaml", namespaceNeedInVarDevResources)
 	th.WriteK("/namespaceNeedInVar/test", namespaceNeedInVarTestFolder)
@@ -576,7 +578,7 @@ vars:
 // TestVariablesDisambiguatedWithNamespace demonstrates that adding the namespace
 // to the variable declarations allows to disambiguate the variables.
 func TestVariablesDisambiguatedWithNamespace(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/namespaceNeedInVar/myapp", namespaceNeedInVarMyAppWithNamespace)
 	th.WriteF("/namespaceNeedInVar/myapp/elasticsearch-dev-service.yaml", namespaceNeedInVarDevResources)
 	th.WriteF("/namespaceNeedInVar/myapp/elasticsearch-test-service.yaml", namespaceNeedInVarTestResources)

api/krusty/nullvalues_test.go

@@ -5,10 +5,12 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 func TestNullValues(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteF("/app/deployment.yaml", `
 apiVersion: apps/v1
 kind: Deployment

api/krusty/pluginenv_test.go

@@ -25,17 +25,17 @@ func TestPluginEnvironment(t *testing.T) {
 		"someteam.example.com", "v1", "PrintPluginEnv")
 
 	confirmBehavior(
-		makeTestHarnessWithFs(t, filesys.MakeFsInMemory()),
+		kusttest_test.MakeHarnessWithFs(t, filesys.MakeFsInMemory()),
 		filesys.Separator)
 
 	dir := makeTmpDir(t)
 	defer os.RemoveAll(dir)
 	confirmBehavior(
-		makeTestHarnessWithFs(t, filesys.MakeFsOnDisk()),
+		kusttest_test.MakeHarnessWithFs(t, filesys.MakeFsOnDisk()),
 		dir)
 }
 
-func confirmBehavior(th testingHarness, dir string) {
+func confirmBehavior(th kusttest_test.Harness, dir string) {
 	th.WriteK(dir, `
 generators:
 - config.yaml

api/krusty/pruneconfigmap_test.go

@@ -5,10 +5,12 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 func TestPruneConfigMap(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 resources:
 - deployment.yaml

api/krusty/resourceconflict_test.go

@@ -6,9 +6,11 @@ package krusty_test
 import (
 	"strings"
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
-func writeBase(th testingHarness) {
+func writeBase(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 resources:
 - serviceaccount.yaml
@@ -62,7 +64,7 @@ rules:
 `)
 }
 
-func writeMidOverlays(th testingHarness) {
+func writeMidOverlays(th kusttest_test.Harness) {
 	// Mid-level overlays
 	th.WriteK("/app/overlays/a", `
 resources:
@@ -78,7 +80,7 @@ nameSuffix: -suffixB
 `)
 }
 
-func writeTopOverlay(th testingHarness) {
+func writeTopOverlay(th kusttest_test.Harness) {
 	// Top overlay, combining the mid-level overlays
 	th.WriteK("/app/combined", `
 resources:
@@ -89,7 +91,7 @@ resources:
 
 func TestBase(t *testing.T) {
 	//th := kusttest_test.NewKustTestHarness(t, "/app/base")
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeBase(th)
 	m := th.Run("/app/base", th.MakeDefaultOptions())
 	th.AssertActualEqualsExpected(m, `
@@ -139,7 +141,7 @@ rules:
 }
 
 func TestMidLevelA(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeBase(th)
 	writeMidOverlays(th)
 	m := th.Run("/app/overlays/a", th.MakeDefaultOptions())
@@ -190,7 +192,7 @@ rules:
 }
 
 func TestMidLevelB(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeBase(th)
 	writeMidOverlays(th)
 	m := th.Run("/app/overlays/b", th.MakeDefaultOptions())
@@ -241,7 +243,7 @@ rules:
 }
 
 func TestMultibasesNoConflict(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	writeBase(th)
 	writeMidOverlays(th)
 	writeTopOverlay(th)
@@ -336,7 +338,7 @@ rules:
 }
 
 func TestMultibasesWithConflict(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	//th := kusttest_test.NewKustTestHarness(t, "/app/combined")
 	writeBase(th)
 	writeMidOverlays(th)

api/krusty/testingharness_test.go

@@ -1,202 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package krusty_test
-
-import (
-	"fmt"
-	"path/filepath"
-	"strings"
-	"testing"
-
-	"sigs.k8s.io/kustomize/api/filesys"
-	"sigs.k8s.io/kustomize/api/konfig"
-	"sigs.k8s.io/kustomize/api/konfig/builtinpluginconsts"
-	. "sigs.k8s.io/kustomize/api/krusty"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-type testingHarness struct {
-	t    *testing.T
-	fSys filesys.FileSystem
-}
-
-func makeTestHarness(t *testing.T) testingHarness {
-	return makeTestHarnessWithFs(t, filesys.MakeFsInMemory())
-}
-
-func makeTestHarnessWithFs(
-	t *testing.T, fSys filesys.FileSystem) testingHarness {
-	return testingHarness{
-		t:    t,
-		fSys: fSys,
-	}
-}
-
-func (th testingHarness) GetT() *testing.T {
-	return th.t
-}
-
-func (th testingHarness) WriteK(path string, content string) {
-	th.fSys.WriteFile(
-		filepath.Join(
-			path,
-			konfig.DefaultKustomizationFileName()), []byte(`
-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-`+content))
-}
-
-func (th testingHarness) WriteF(path string, content string) {
-	th.fSys.WriteFile(path, []byte(content))
-}
-
-func (th testingHarness) MakeDefaultOptions() Options {
-	return th.MakeOptionsPluginsDisabled()
-}
-
-// This has no impact on Builtin plugins, as they are always enabled.
-func (th testingHarness) MakeOptionsPluginsDisabled() Options {
-	return Options{
-		LoadRestrictions: types.LoadRestrictionsRootOnly,
-		PluginConfig:     konfig.DisabledPluginConfig(),
-	}
-}
-
-// Enables use of non-builtin plugins.
-func (th testingHarness) MakeOptionsPluginsEnabled() Options {
-	c, err := konfig.EnabledPluginConfig()
-	if err != nil {
-		if strings.Contains(err.Error(), "unable to find plugin root") {
-			th.t.Log(
-				"Tests that want to run with plugins enabled must be " +
-					"bookended by calls to NewPluginTestEnv.Set(), Reset().")
-		}
-		th.t.Fatal(err)
-	}
-	return Options{
-		LoadRestrictions: types.LoadRestrictionsRootOnly,
-		PluginConfig:     c,
-	}
-}
-
-// Run, failing on error.
-func (th testingHarness) Run(path string, o Options) resmap.ResMap {
-	m, err := MakeKustomizer(th.fSys, &o).Run(path)
-	if err != nil {
-		th.t.Fatal(err)
-	}
-	return m
-}
-
-// Run, failing if there is no error.
-func (th testingHarness) RunWithErr(path string, o Options) error {
-	_, err := MakeKustomizer(th.fSys, &o).Run(path)
-	if err == nil {
-		th.t.Fatalf("expected error")
-	}
-	return err
-}
-
-func (th testingHarness) AssertActualEqualsExpected(
-	m resmap.ResMap, expected string) {
-	th.AssertActualEqualsExpectedWithTweak(m, nil, expected)
-}
-
-func (th testingHarness) AssertActualEqualsExpectedWithTweak(
-	m resmap.ResMap, tweaker func([]byte) []byte, expected string) {
-	if m == nil {
-		th.t.Fatalf("Map should not be nil.")
-	}
-	// Ignore leading linefeed in expected value
-	// to ease readability of tests.
-	if len(expected) > 0 && expected[0] == 10 {
-		expected = expected[1:]
-	}
-	actual, err := m.AsYaml()
-	if err != nil {
-		th.t.Fatalf("Unexpected err: %v", err)
-	}
-	if tweaker != nil {
-		actual = tweaker(actual)
-	}
-	if string(actual) != expected {
-		th.reportDiffAndFail(actual, expected)
-	}
-}
-
-// Pretty printing of file differences.
-func (th testingHarness) reportDiffAndFail(actual []byte, expected string) {
-	sE, maxLen := convertToArray(expected)
-	sA, _ := convertToArray(string(actual))
-	fmt.Println("===== ACTUAL BEGIN ========================================")
-	fmt.Print(string(actual))
-	fmt.Println("===== ACTUAL END ==========================================")
-	format := fmt.Sprintf("%%s  %%-%ds %%s\n", maxLen+4)
-	limit := 0
-	if len(sE) < len(sA) {
-		limit = len(sE)
-	} else {
-		limit = len(sA)
-	}
-	fmt.Printf(format, " ", "EXPECTED", "ACTUAL")
-	fmt.Printf(format, " ", "--------", "------")
-	for i := 0; i < limit; i++ {
-		fmt.Printf(format, hint(sE[i], sA[i]), sE[i], sA[i])
-	}
-	if len(sE) < len(sA) {
-		for i := len(sE); i < len(sA); i++ {
-			fmt.Printf(format, "X", "", sA[i])
-		}
-	} else {
-		for i := len(sA); i < len(sE); i++ {
-			fmt.Printf(format, "X", sE[i], "")
-		}
-	}
-	th.t.Fatalf("Expected not equal to actual")
-}
-
-func convertToArray(x string) ([]string, int) {
-	a := strings.Split(strings.TrimSuffix(x, "\n"), "\n")
-	maxLen := 0
-	for i, v := range a {
-		z := tabToSpace(v)
-		if len(z) > maxLen {
-			maxLen = len(z)
-		}
-		a[i] = z
-	}
-	return a, maxLen
-}
-
-func hint(a, b string) string {
-	if a == b {
-		return " "
-	}
-	return "X"
-}
-
-func tabToSpace(input string) string {
-	var result []string
-	for _, i := range input {
-		if i == 9 {
-			result = append(result, "  ")
-		} else {
-			result = append(result, string(i))
-		}
-	}
-	return strings.Join(result, "")
-}
-
-func (th testingHarness) WriteLegacyConfigs(fName string) {
-	m := builtinpluginconsts.GetDefaultFieldSpecsAsMap()
-	var content []byte
-	for _, tCfg := range m {
-		content = append(content, []byte(tCfg)...)
-	}
-	err := th.fSys.WriteFile(fName, content)
-	if err != nil {
-		th.t.Fatalf("unable to add file %s", fName)
-	}
-}

api/krusty/transformerplugin_test.go

@@ -10,7 +10,7 @@ import (
 	"sigs.k8s.io/kustomize/api/types"
 )
 
-func writeDeployment(th testingHarness, path string) {
+func writeDeployment(th kusttest_test.Harness, path string) {
 	th.WriteF(path, `
 apiVersion: apps/v1
 kind: Deployment
@@ -28,7 +28,7 @@ spec:
 `)
 }
 
-func writeStringPrefixer(th testingHarness, path, name string) {
+func writeStringPrefixer(th kusttest_test.Harness, path, name string) {
 	th.WriteF(path, `
 apiVersion: someteam.example.com/v1
 kind: StringPrefixer
@@ -37,7 +37,7 @@ metadata:
 `)
 }
 
-func writeDatePrefixer(th testingHarness, path, name string) {
+func writeDatePrefixer(th kusttest_test.Harness, path, name string) {
 	th.WriteF(path, `
 apiVersion: someteam.example.com/v1
 kind: DatePrefixer
@@ -55,7 +55,7 @@ func TestOrderedTransformers(t *testing.T) {
 
 	tc.BuildGoPlugin(
 		"someteam.example.com", "v1", "DatePrefixer")
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 resources:
 - deployment.yaml
@@ -95,7 +95,7 @@ func TestPluginsNotEnabled(t *testing.T) {
 	tc.BuildGoPlugin(
 		"someteam.example.com", "v1", "StringPrefixer")
 
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 transformers:
 - stringPrefixer.yaml
@@ -117,7 +117,7 @@ func TestSedTransformer(t *testing.T) {
 	tc.PrepExecPlugin(
 		"someteam.example.com", "v1", "SedTransformer")
 
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 resources:
 - configmap.yaml
@@ -185,7 +185,7 @@ func TestTransformedTransformers(t *testing.T) {
 	tc.BuildGoPlugin(
 		"someteam.example.com", "v1", "DatePrefixer")
 
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 
 	th.WriteK("/app/base", `
 resources:

api/krusty/transformersarrays_test.go

@@ -5,9 +5,11 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
-func makeStatefulSetKustomization(th testingHarness) {
+func makeStatefulSetKustomization(th kusttest_test.Harness) {
 	th.WriteK("/app", `
 commonLabels:
   notIn: arrays
@@ -90,7 +92,7 @@ spec:
 }
 
 func TestTransformersNoCreateArrays(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeStatefulSetKustomization(th)
 	m := th.Run("/app", th.MakeDefaultOptions())
 	th.AssertActualEqualsExpected(m, `

api/krusty/transformersimage_test.go

@@ -5,9 +5,11 @@ package krusty_test
 
 import (
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
-func makeTransfomersImageBase(th testingHarness) {
+func makeTransfomersImageBase(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 resources:
 - deploy1.yaml
@@ -92,7 +94,7 @@ spec3:
 }
 
 func TestIssue1281_JsonPatchAndImageTag(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 resources:
 - deployment.yaml
@@ -172,7 +174,7 @@ spec:
 }
 
 func TestTransfomersImageDefaultConfig(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeTransfomersImageBase(th)
 	m := th.Run("/app/base", th.MakeDefaultOptions())
 	th.AssertActualEqualsExpected(m, `
@@ -233,7 +235,7 @@ spec3:
 `)
 }
 
-func makeTransfomersImageCustomBase(th testingHarness) {
+func makeTransfomersImageCustomBase(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 resources:
 - custom.yaml
@@ -306,7 +308,7 @@ images:
 }
 
 func TestTransfomersImageCustomConfig(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeTransfomersImageCustomBase(th)
 	m := th.Run("/app/base", th.MakeDefaultOptions())
 	th.AssertActualEqualsExpected(m, `
@@ -346,7 +348,7 @@ spec3:
 `)
 }
 
-func makeTransfomersImageKnativeBase(th testingHarness) {
+func makeTransfomersImageKnativeBase(th kusttest_test.Harness) {
 	th.WriteK("/app/base", `
 resources:
 - knative.yaml
@@ -378,7 +380,7 @@ images:
 }
 
 func TestTransfomersImageKnativeConfig(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	makeTransfomersImageKnativeBase(th)
 	m := th.Run("/app/base", th.MakeDefaultOptions())
 	th.AssertActualEqualsExpected(m, `

api/krusty/variableref_test.go

@@ -6,10 +6,12 @@ package krusty_test
 import (
 	"strings"
 	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/api/testutils/kusttest"
 )
 
 func TestBasicVariableRef(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app", `
 namePrefix: base-
 resources:
@@ -60,7 +62,7 @@ spec:
 }
 
 func TestBasicVarCollision(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base1", `
 namePrefix: base1-
 resources:
@@ -136,7 +138,7 @@ resources:
 }
 
 func TestVarPropagatesUp(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base1", `
 namePrefix: base1-
 resources:
@@ -279,7 +281,7 @@ spec:
 // are global.  So if a base with a variable is included
 // twice, it's a collision, so it's denied.
 func TestBug506(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 namePrefix: base-
 resources:
@@ -359,7 +361,7 @@ resources:
 }
 
 func TestVarRefBig(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 namePrefix: base-
 resources:
@@ -925,7 +927,7 @@ metadata:
 }
 
 func TestVariableRefIngress(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 resources:
 - service.yaml
@@ -1064,7 +1066,7 @@ spec:
 }
 
 func TestVariableRefMountPath(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 resources:
 - deployment.yaml
@@ -1136,7 +1138,7 @@ metadata:
 }
 
 func TestVariableRefMaps(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 resources:
 - deployment.yaml
@@ -1192,7 +1194,7 @@ metadata:
 }
 
 func TestVaribaleRefDifferentPrefix(t *testing.T) {
-	th := makeTestHarness(t)
+	th := kusttest_test.MakeHarness(t)
 	th.WriteK("/app/base", `
 namePrefix: base-
 resources: