Add test cases for multi configs

pkg/kn/commands/types_test.go

@@ -0,0 +1,71 @@
+// Copyright © 2019 The Knative 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 commands
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"reflect"
+	"testing"
+
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+type typeTestCase struct {
+	kubeCfgPath   string
+	explicitPath  string
+	expectedError error
+}
+
+func TestGetClientConfig(t *testing.T) {
+	multiConfigs := fmt.Sprintf("%s%s%s", "/testing/assets/kube-config-01.yml", string(os.PathListSeparator), "/testing/assets/kube-config-02.yml")
+
+	for i, tc := range []typeTestCase{
+		{
+			"",
+			clientcmd.NewDefaultClientConfigLoadingRules().ExplicitPath,
+			nil,
+		},
+		{
+			"/testing/assets/kube-config-01.yml",
+			"/testing/assets/kube-config-01.yml",
+			nil,
+		},
+		{
+			multiConfigs,
+			"",
+			errors.New(fmt.Sprintf("Config file '%s' could not be found. For configuration lookup path please use the env variable KUBECONFIG", multiConfigs)),
+		},
+	} {
+		p := &KnParams{
+			KubeCfgPath: tc.kubeCfgPath,
+		}
+
+		clientConfig, err := p.GetClientConfig()
+
+		if !reflect.DeepEqual(err, tc.expectedError) {
+			t.Errorf("%d: wrong error detected: %s (expected) != %s (actual)", i, tc.expectedError.Error(), err.Error())
+		}
+
+		if clientConfig != nil {
+			configAccess := clientConfig.ConfigAccess()
+
+			if configAccess.GetExplicitFile() != tc.explicitPath {
+				t.Errorf("%d: wrong explicit file detected: %s (expected) != %s (actual)", i, tc.explicitPath, configAccess.GetExplicitFile())
+			}
+		}
+	}
+}