Update src/test/java/org/jenkinsci/plugins/docker/commons/credentials/ImageNameValidatorTest.java

Co-authored-by: Robert Sandell <rsandell@cloudbees.com>

Author: viceice

src/test/java/org/jenkinsci/plugins/docker/commons/credentials/ImageNameValidatorTest.java

@@ -27,6 +27,12 @@ public class ImageNameValidatorTest {
                 {"jenkinsci/workflow-demo@sha256:56930391cf0e1be83108422bbef43001650cfb75f64b3429928f0c5986fdb750",                  FormValidation.Kind.OK},
                 {"docker:80/jenkinsci/workflow-demo@sha256:56930391cf0e1be83108422bbef43001650cfb75f64b3429928f0c5986fdb750",        FormValidation.Kind.OK},
                 {"docker:80/jenkinsci/workflow-demo:latest@sha256:56930391cf0e1be83108422bbef43001650cfb75f64b3429928f0c5986fdb750", FormValidation.Kind.OK},
+                {"docker:80/jenkinsci/workflow-demo:latest@sha1:0123456789abcdef", FormValidation.Kind.ERROR},                                //?
+                {"workflow-demo:latest@",                                         FormValidation.Kind.ERROR},
+                {"workflow-demo@",                            FormValidation.Kind.ERROR},
+                {"jenkinsci/workflow-demo@",                  FormValidation.Kind.ERROR},
+                {"docker:80/jenkinsci/workflow-demo@",        FormValidation.Kind.ERROR},
+                {"docker:80/jenkinsci/workflow-demo:latest@", FormValidation.Kind.ERROR},
                 {":tag",                                                                                                             FormValidation.Kind.ERROR},
                 {"name:tag",                                                                                                         FormValidation.Kind.OK},
                 {"name:.tag",                                                                                                        FormValidation.Kind.ERROR},