Add unit test for pkg/nodelabels/builder.go

Signed-off-by: Dao Cong Tien <tiendc@vn.fujitsu.com>

pkg/nodelabels/BUILD.bazel

@@ -1,4 +1,4 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_library")
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
     name = "go_default_library",
@@ -10,3 +10,10 @@ go_library(
         "//util/pkg/reflectutils:go_default_library",
     ],
 )
+
+go_test(
+    name = "go_default_test",
+    srcs = ["builder_test.go"],
+    embed = [":go_default_library"],
+    deps = ["//pkg/apis/kops:go_default_library"],
+)

pkg/nodelabels/builder_test.go

@@ -0,0 +1,120 @@
+/*
+Copyright 2020 The Kubernetes 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 nodelabels
+
+import (
+	"reflect"
+	"testing"
+
+	"k8s.io/kops/pkg/apis/kops"
+)
+
+func TestBuildNodeLabels(t *testing.T) {
+	tests := []struct {
+		name     string
+		cluster  *kops.Cluster
+		ig       *kops.InstanceGroup
+		expected map[string]string
+	}{
+		{
+			name: "RoleMaster",
+			cluster: &kops.Cluster{
+				Spec: kops.ClusterSpec{
+					KubernetesVersion: "v1.9.0",
+					MasterKubelet: &kops.KubeletConfigSpec{
+						NodeLabels: map[string]string{
+							"master1": "master1",
+							"master2": "master2",
+						},
+					},
+					Kubelet: &kops.KubeletConfigSpec{
+						NodeLabels: map[string]string{
+							"node1": "node1",
+							"node2": "node2",
+						},
+					},
+				},
+			},
+			ig: &kops.InstanceGroup{
+				Spec: kops.InstanceGroupSpec{
+					Role: kops.InstanceGroupRoleMaster,
+					Kubelet: &kops.KubeletConfigSpec{
+						NodeLabels: map[string]string{
+							"node1": "override1",
+							"node3": "override3",
+						},
+					},
+				},
+			},
+			expected: map[string]string{
+				RoleLabelMaster16: "",
+				RoleLabelName15:   RoleMasterLabelValue15,
+				"master1":         "master1",
+				"master2":         "master2",
+				"node1":           "override1",
+				"node3":           "override3",
+			},
+		},
+		{
+			name: "RoleNode",
+			cluster: &kops.Cluster{
+				Spec: kops.ClusterSpec{
+					KubernetesVersion: "v1.9.0",
+					MasterKubelet: &kops.KubeletConfigSpec{
+						NodeLabels: map[string]string{
+							"master1": "master1",
+							"master2": "master2",
+						},
+					},
+					Kubelet: &kops.KubeletConfigSpec{
+						NodeLabels: map[string]string{
+							"node1": "node1",
+							"node2": "node2",
+						},
+					},
+				},
+			},
+			ig: &kops.InstanceGroup{
+				Spec: kops.InstanceGroupSpec{
+					Role: kops.InstanceGroupRoleNode,
+					Kubelet: &kops.KubeletConfigSpec{
+						NodeLabels: map[string]string{
+							"node1": "override1",
+							"node3": "override3",
+						},
+					},
+				},
+			},
+			expected: map[string]string{
+				RoleLabelNode16: "",
+				RoleLabelName15: RoleNodeLabelValue15,
+				"node2":         "node2",
+				"node1":         "override1",
+				"node3":         "override3",
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			out, _ := BuildNodeLabels(test.cluster, test.ig)
+			if !reflect.DeepEqual(out, test.expected) {
+				t.Fatalf("Actual result:\n%v\nExpect:\n%v", out, test.expected)
+			}
+		})
+	}
+}