test: add unit-tests for internal/version.go

go.mod

@@ -10,14 +10,17 @@ require (
 	github.com/sirupsen/logrus v1.9.3
 	github.com/spf13/cobra v1.7.0
 	github.com/spf13/pflag v1.0.5
+	github.com/stretchr/testify v1.7.0
 	golang.org/x/term v0.8.0
 	gopkg.in/yaml.v3 v3.0.1
 	oras.land/oras-go/v2 v2.2.0
 )
 
 require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/docker/docker-credential-helpers v0.7.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	golang.org/x/sync v0.2.0 // indirect
 	golang.org/x/sys v0.8.0 // indirect
 )

internal/version/version_test.go

@@ -0,0 +1,37 @@
+/*
+Copyright The ORAS 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 (
+	"reflect"
+	"testing"
+)
+
+func Test_GetVersion(t *testing.T) {
+	expected := "1.0.0+unreleased"
+	actual := GetVersion()
+	if !reflect.DeepEqual(expected, actual) {
+		t.Errorf("Tested GetVersion expected was %v actually got %v", expected, actual)
+	}
+
+}
+
+func Test_GetVersion_when_BuildData_is_empty(t *testing.T) {
+	BuildMetadata = ""
+	expected := "1.0.0"
+	actual := GetVersion()
+	if !reflect.DeepEqual(expected, actual) {
+		t.Errorf("Tested GetVersion expected was %v actually got %v", expected, actual)
+	}
+}