Merge pull request #49842 from clairew/v1helper-OpaqueIntResourceName-unit-tests

Automatic merge from submit-queue (batch tested with PRs 49842, 50649)

Add Unit Test: opaque int resource name

**What this PR does / why we need it**: https://github.com/kubernetes/kubernetes/issues/49384, adding unit tests for functions related to the prefix OpaqueIntResourceName in /pkg/api/v1helper

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

pkg/api/v1/helper/helpers_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package helper
 
 import (
+	"fmt"
 	"reflect"
 	"testing"
 
@@ -26,6 +27,64 @@ import (
 	"k8s.io/apimachinery/pkg/labels"
 )
 
+func TestIsOpaqueIntResourceName(t *testing.T) { // resourceName input with the correct OpaqueIntResourceName prefix ("pod.alpha.kubernetes.io/opaque-int-resource-") should pass
+	testCases := []struct {
+		resourceName v1.ResourceName
+		expectVal    bool
+	}{
+		{
+			resourceName: "pod.alpha.kubernetes.io/opaque-int-resource-foo",
+			expectVal:    true, // resourceName should pass because the resourceName has the correct prefix.
+		},
+		{
+			resourceName: "foo",
+			expectVal:    false, // resourceName should fail because the resourceName has the wrong prefix.
+		},
+		{
+			resourceName: "",
+			expectVal:    false, // resourceName should fail, empty resourceName.
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc
+		t.Run(fmt.Sprintf("resourceName input=%s, expected value=%v", tc.resourceName, tc.expectVal), func(t *testing.T) {
+			t.Parallel()
+			v := IsOpaqueIntResourceName(tc.resourceName)
+			if v != tc.expectVal {
+				t.Errorf("Got %v but expected %v", v, tc.expectVal)
+			}
+		})
+	}
+}
+
+func TestOpaqueIntResourceName(t *testing.T) { // each output should have the correct appended prefix ("pod.alpha.kubernetes.io/opaque-int-resource-") for opaque counted resources.
+	testCases := []struct {
+		name      string
+		expectVal v1.ResourceName
+	}{
+		{
+			name:      "foo",
+			expectVal: "pod.alpha.kubernetes.io/opaque-int-resource-foo", // append prefix to input string foo
+		},
+		{
+			name:      "",
+			expectVal: "pod.alpha.kubernetes.io/opaque-int-resource-", // append prefix to input empty string
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc
+		t.Run(fmt.Sprintf("name input=%s, expected value=%s", tc.name, tc.expectVal), func(t *testing.T) {
+			t.Parallel()
+			v := OpaqueIntResourceName(tc.name)
+			if v != tc.expectVal {
+				t.Errorf("Got %v but expected %v", v, tc.expectVal)
+			}
+		})
+	}
+}
+
 func TestAddToNodeAddresses(t *testing.T) {
 	testCases := []struct {
 		existing []v1.NodeAddress