Correct error variables and fix other golint errors.

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

pkg/connection/connection_test.go

@@ -104,7 +104,7 @@ func TestGetPluginInfo(t *testing.T) {
 		in := &csi.GetPluginInfoRequest{}
 
 		out := test.output
-		var injectedErr error = nil
+		var injectedErr error
 		if test.injectError {
 			injectedErr = fmt.Errorf("mock error")
 		}
@@ -214,7 +214,7 @@ func TestSupportsControllerCreateSnapshot(t *testing.T) {
 		in := &csi.ControllerGetCapabilitiesRequest{}
 
 		out := test.output
-		var injectedErr error = nil
+		var injectedErr error
 		if test.injectError {
 			injectedErr = fmt.Errorf("mock error")
 		}
@@ -354,7 +354,7 @@ func TestSupportsControllerListSnapshots(t *testing.T) {
 		in := &csi.ControllerGetCapabilitiesRequest{}
 
 		out := test.output
-		var injectedErr error = nil
+		var injectedErr error
 		if test.injectError {
 			injectedErr = fmt.Errorf("mock error")
 		}
@@ -524,7 +524,7 @@ func TestCreateSnapshot(t *testing.T) {
 	for _, test := range tests {
 		in := test.input
 		out := test.output
-		var injectedErr error = nil
+		var injectedErr error
 		if test.injectError != codes.OK {
 			injectedErr = status.Error(test.injectError, fmt.Sprintf("Injecting error %d", test.injectError))
 		}
@@ -632,7 +632,7 @@ func TestDeleteSnapshot(t *testing.T) {
 	for _, test := range tests {
 		in := test.input
 		out := test.output
-		var injectedErr error = nil
+		var injectedErr error
 		if test.injectError != codes.OK {
 			injectedErr = status.Error(test.injectError, fmt.Sprintf("Injecting error %d", test.injectError))
 		}
@@ -730,7 +730,7 @@ func TestGetSnapshotStatus(t *testing.T) {
 	for _, test := range tests {
 		in := test.input
 		out := test.output
-		var injectedErr error = nil
+		var injectedErr error
 		if test.injectError != codes.OK {
 			injectedErr = status.Error(test.injectError, fmt.Sprintf("Injecting error %d", test.injectError))
 		}

pkg/controller/framework_test.go

@@ -119,7 +119,7 @@ type testCall func(ctrl *csiSnapshotController, reactor *snapshotReactor, test c
 const testNamespace = "default"
 const mockDriverName = "csi-mock-plugin"
 
-var versionConflictError = errors.New("VersionError")
+var errVersionConflict = errors.New("VersionError")
 var nocontents []*crdv1.VolumeSnapshotContent
 var nosnapshots []*crdv1.VolumeSnapshot
 var noevents = []string{}
@@ -228,7 +228,7 @@ func (r *snapshotReactor) React(action core.Action) (handled bool, ret runtime.O
 			storedVer, _ := strconv.Atoi(storedVolume.ResourceVersion)
 			requestedVer, _ := strconv.Atoi(content.ResourceVersion)
 			if storedVer != requestedVer {
-				return true, obj, versionConflictError
+				return true, obj, errVersionConflict
 			}
 			// Don't modify the existing object
 			content = content.DeepCopy()
@@ -254,7 +254,7 @@ func (r *snapshotReactor) React(action core.Action) (handled bool, ret runtime.O
 			storedVer, _ := strconv.Atoi(storedSnapshot.ResourceVersion)
 			requestedVer, _ := strconv.Atoi(snapshot.ResourceVersion)
 			if storedVer != requestedVer {
-				return true, obj, versionConflictError
+				return true, obj, errVersionConflict
 			}
 			// Don't modify the existing object
 			snapshot = snapshot.DeepCopy()
@@ -966,16 +966,16 @@ func testSyncContent(ctrl *csiSnapshotController, reactor *snapshotReactor, test
 }
 
 var (
-	classEmpty         string = ""
-	classGold          string = "gold"
-	classSilver        string = "silver"
-	classNonExisting   string = "non-existing"
-	defaultClass       string = "default-class"
-	emptySecretClass   string = "empty-secret-class"
-	invalidSecretClass string = "invalid-secret-class"
-	validSecretClass   string = "valid-secret-class"
-	sameDriver         string = "sameDriver"
-	diffDriver         string = "diffDriver"
+	classEmpty         string
+	classGold          = "gold"
+	classSilver        = "silver"
+	classNonExisting   = "non-existing"
+	defaultClass       = "default-class"
+	emptySecretClass   = "empty-secret-class"
+	invalidSecretClass = "invalid-secret-class"
+	validSecretClass   = "valid-secret-class"
+	sameDriver         = "sameDriver"
+	diffDriver         = "diffDriver"
 )
 
 // wrapTestWithInjectedOperation returns a testCall that:

pkg/controller/snapshot_controller.go

@@ -556,9 +556,9 @@ func (ctrl *csiSnapshotController) getCreateSnapshotInput(snapshot *crdv1.Volume
 
 func (ctrl *csiSnapshotController) checkandUpdateBoundSnapshotStatusOperation(snapshot *crdv1.VolumeSnapshot, content *crdv1.VolumeSnapshotContent) (*crdv1.VolumeSnapshot, error) {
 	var err error
-	var timestamp int64 = 0
-	var size int64 = 0
-	var readyToUse bool = false
+	var timestamp int64
+	var size int64
+	var readyToUse = false
 	class, volume, _, snapshotterCredentials, err := ctrl.getCreateSnapshotInput(snapshot)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get input parameters to create snapshot %s: %q", snapshot.Name, err)

pkg/controller/util.go

@@ -168,21 +168,21 @@ func verifyAndGetSecretNameAndNamespaceTemplate(secret deprecatedSecretParamsMap
 	numNamespace := 0
 	if t, ok := snapshotClassParams[secret.deprecatedSecretNameKey]; ok {
 		nameTemplate = t
-		numName += 1
+		numName++
 		glog.Warning(deprecationWarning(secret.deprecatedSecretNameKey, secret.secretNameKey, ""))
 	}
 	if t, ok := snapshotClassParams[secret.deprecatedSecretNamespaceKey]; ok {
 		namespaceTemplate = t
-		numNamespace += 1
+		numNamespace++
 		glog.Warning(deprecationWarning(secret.deprecatedSecretNamespaceKey, secret.secretNamespaceKey, ""))
 	}
 	if t, ok := snapshotClassParams[secret.secretNameKey]; ok {
 		nameTemplate = t
-		numName += 1
+		numName++
 	}
 	if t, ok := snapshotClassParams[secret.secretNamespaceKey]; ok {
 		namespaceTemplate = t
-		numNamespace += 1
+		numNamespace++
 	}
 
 	if numName > 1 || numNamespace > 1 {