test: added tests for the pkg/kubernetes package (#896)

Signed-off-by: VaibhavMalik4187 <vaibhavmalik2018@gmail.com>

pkg/kubernetes/apireference_test.go

@@ -0,0 +1,106 @@
+/*
+Copyright 2024 The K8sGPT 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 kubernetes
+
+import (
+	"testing"
+
+	openapi_v2 "github.com/google/gnostic/openapiv2"
+	"github.com/stretchr/testify/require"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+func TestGetApiDocV2(t *testing.T) {
+	k8s := &K8sApiReference{
+		ApiVersion: schema.GroupVersion{
+			Group:   "group.v1",
+			Version: "v1",
+		},
+		OpenapiSchema: &openapi_v2.Document{
+			Definitions: &openapi_v2.Definitions{
+				AdditionalProperties: []*openapi_v2.NamedSchema{
+					{
+						Name: "group.v1.kind",
+						Value: &openapi_v2.Schema{
+							Title: "test",
+							Properties: &openapi_v2.Properties{
+								AdditionalProperties: []*openapi_v2.NamedSchema{
+									{
+										Name: "schema1",
+										Value: &openapi_v2.Schema{
+											Title:       "test",
+											Description: "schema1 description",
+											Type: &openapi_v2.TypeItem{
+												Value: []string{"string"},
+											},
+										},
+									},
+									{
+										Name: "schema2",
+										Value: &openapi_v2.Schema{
+											Items: &openapi_v2.ItemsItem{
+												Schema: []*openapi_v2.Schema{
+													{
+														Title: "random-schema",
+													},
+												},
+											},
+											Title:       "test",
+											XRef:        "xref",
+											Description: "schema2 description",
+											Type: &openapi_v2.TypeItem{
+												Value: []string{"bool"},
+											},
+										},
+									},
+								},
+							},
+						},
+					},
+					{
+						Name: "group",
+					},
+				},
+			},
+		},
+		Kind: "kind",
+	}
+
+	tests := []struct {
+		name           string
+		field          string
+		expectedOutput string
+	}{
+		{
+			name: "empty field",
+		},
+		{
+			name:           "2 schemas",
+			field:          "schema2.schema1",
+			expectedOutput: "",
+		},
+		{
+			name:           "schema1 description",
+			field:          "schema1",
+			expectedOutput: "schema1 description",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			output := k8s.GetApiDocV2(tt.field)
+			require.Equal(t, tt.expectedOutput, output)
+		})
+	}
+}

pkg/kubernetes/kubernetes_test.go

@@ -0,0 +1,79 @@
+/*
+Copyright 2024 The K8sGPT 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 kubernetes
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"k8s.io/client-go/rest"
+)
+
+func TestSliceContainsString(t *testing.T) {
+	tests := []struct {
+		name        string
+		kubeContext string
+		kubeConfig  string
+		expectedErr string
+	}{
+		{
+			name:        "empty config and empty context",
+			kubeContext: "",
+			kubeConfig:  "",
+			expectedErr: "invalid configuration: no configuration has been provided, try setting KUBERNETES_MASTER environment variable",
+		},
+		{
+			name:        "non empty config and empty context",
+			kubeContext: "",
+			kubeConfig:  "kube-config",
+			expectedErr: "stat kube-config: no such file or directory",
+		},
+		{
+			name:        "empty config and non empty context",
+			kubeContext: "some-context",
+			kubeConfig:  "",
+			expectedErr: "context \"some-context\" does not exist",
+		},
+		{
+			name:        "non empty config and non empty context",
+			kubeContext: "minikube",
+			kubeConfig:  "./testdata/kubeconfig",
+			expectedErr: "Get \"https://192.168.49.2:8443/version\": dial tcp 192.168.49.2:8443",
+		},
+	}
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			client, err := NewClient(tt.kubeContext, tt.kubeConfig)
+			if tt.expectedErr == "" {
+				require.NoError(t, err)
+			} else {
+				require.ErrorContains(t, err, tt.expectedErr)
+				require.Nil(t, client)
+			}
+		})
+	}
+}
+
+func TestKubernetesClient(t *testing.T) {
+	client := Client{
+		Config: &rest.Config{
+			Host: "host",
+		},
+	}
+
+	require.NotEmpty(t, client.GetConfig())
+	require.Nil(t, client.GetClient())
+	require.Nil(t, client.GetCtrlClient())
+}

pkg/kubernetes/testdata/kubeconfig

@@ -0,0 +1,16 @@
+apiVersion: v1
+clusters:
+- cluster:
+    server: https://192.168.49.2:8443
+  name: minikube
+contexts:
+- context:
+    cluster: minikube
+    namespace: default
+    user: minikube
+  name: minikube
+current-context: minikube
+kind: Config
+preferences: {}
+users:
+- name: minikube