Add unit tests for pkg/version/version.go (#4375)

Signed-off-by: Harshitha U R <harshithaur1611@gmail.com>

pkg/version/version_test.go

@@ -0,0 +1,94 @@
+// Copyright 2022 Antrea 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 version
+
+import (
+	"fmt"
+	"runtime"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetFullVersion(t *testing.T) {
+	testCases := []struct {
+		name            string
+		Version         string
+		ReleaseStatus   string
+		GitSHA          string
+		GitTreeState    string
+		expectedVersion string
+	}{
+		{
+			name:            "Unknown version",
+			expectedVersion: "UNKNOWN",
+		},
+		{
+			name:            "Released version",
+			Version:         "1.9",
+			ReleaseStatus:   "released",
+			expectedVersion: "1.9",
+		},
+		{
+			name:            "Unreleased version",
+			Version:         "1.10",
+			ReleaseStatus:   "unreleased",
+			expectedVersion: "1.10-unknown",
+		},
+		{
+			name:            "Unreleased version with GitTreeState dirty",
+			Version:         "1.10",
+			ReleaseStatus:   "unreleased",
+			GitSHA:          "abc",
+			GitTreeState:    "dirty",
+			expectedVersion: "1.10-abc.dirty",
+		},
+		{
+			name:            "Unreleased version with GitTreeState empty",
+			Version:         "1.10",
+			ReleaseStatus:   "unreleased",
+			GitSHA:          "abc",
+			GitTreeState:    "",
+			expectedVersion: "1.10-abc",
+		},
+		{
+			name:            "Unreleased version with GitTreeState clean",
+			Version:         "1.10",
+			ReleaseStatus:   "unreleased",
+			GitSHA:          "abc",
+			GitTreeState:    "clean",
+			expectedVersion: "1.10-abc",
+		},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			Version = tc.Version
+			ReleaseStatus = tc.ReleaseStatus
+			GitSHA = tc.GitSHA
+			GitTreeState = tc.GitTreeState
+			gotVersion := GetFullVersion()
+			Version = ""
+			ReleaseStatus = ""
+			GitSHA = ""
+			GitTreeState = "unreleased"
+			assert.Equal(t, tc.expectedVersion, gotVersion)
+		})
+	}
+}
+
+func TestGetFullVersionWithRuntimeInfo(t *testing.T) {
+	gotVersion := GetFullVersionWithRuntimeInfo()
+	assert.Equal(t, fmt.Sprintf("UNKNOWN %s/%s %s", runtime.GOOS, runtime.GOARCH, runtime.Version()), gotVersion)
+}