@Test
  public void testExecute_failOffline() throws IOException {
    String targetImage = getTestImageReference("simpleimageoffline:maven");

    // Test empty output error
    try {
      Verifier verifier = new Verifier(simpleTestProject.getProjectRoot().toString());
      verifier.setSystemProperty("_TARGET_IMAGE", targetImage);
      verifier.setAutoclean(false);
      verifier.addCliOption("--offline");
      verifier.executeGoals(Arrays.asList("clean", "compile", "jib:build"));
      fail();

    } catch (VerificationException ex) {
      assertThat(ex)
          .hasMessageThat()
          .contains("Cannot build to a container registry in offline mode");
    }
  }
Pulls a built image and attempts to run it. Also verifies the container configuration and
history of the built image.

@param imageReference the image reference of the built image
@return the container output
@throws IOException if an I/O exception occurs
@throws InterruptedException if the process was interrupted
jib-maven-plugin/src/integration-test/java/com/google/cloud/tools/jib/maven/BuildImageMojoIntegrationTest.java