Add function for imagestreamtag

Author: Shilpa Chugh

support/image.go

@@ -32,3 +32,12 @@ func GetImageStream(t Test, namespace string, name string) *imagev1.ImageStream
 
 	return is
 }
+
+func GetImageStreamTag(t Test, namespace string, name string) *imagev1.ImageStreamTag {
+	t.T().Helper()
+
+	istag, err := t.Client().Image().ImageV1().ImageStreamTags(namespace).Get(t.Ctx(), name, metav1.GetOptions{})
+	t.Expect(err).NotTo(gomega.HaveOccurred())
+
+	return istag
+}

support/image_test.go

@@ -28,3 +28,22 @@ func TestGetImageStream(t *testing.T) {
 	test.Expect(image.Name).To(gomega.Equal("my-imagestream-1"))
 	test.Expect(image.Namespace).To(gomega.Equal("my-namespace"))
 }
+
+func TestGetImageStreamTag(t *testing.T) {
+
+	test := NewTest(t)
+
+	imageStreamTag := &imagev1.ImageStreamTag{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "my-imagestreamtag",
+			Namespace: "my-namespace",
+		},
+	}
+
+	test.client.Image().ImageV1().ImageStreamTags("my-namespace").Create(test.ctx, imageStreamTag, metav1.CreateOptions{})
+
+	imageTag := GetImageStreamTag(test, "my-namespace", "my-imagestreamtag")
+
+	test.Expect(imageTag.Name).To(gomega.Equal("my-imagestreamtag"))
+	test.Expect(imageTag.Namespace).To(gomega.Equal("my-namespace"))
+}