assertTrue(generator.generate("test_id", outputFile));
        } finally {
            outputFile.delete();
        }
    }

    public void test_generate_outputFile_null() throws Exception {
        generator.setCommandList(Collections.singletonList("echo test"));
        try {
            generator.generate("test_id", null);
            fail("Should throw exception for null output file");

                    <version>24</version>
                    <vendor>temurin</vendor>
                  </jdk>
                  <testJdk>
                    <version>${surefire.toolchain.version}</version>
                    <vendor>temurin</vendor>
                  </testJdk>
                </toolchains>
              </configuration>
            </execution>
          </executions>
        </plugin>

                    <version>24</version>
                    <vendor>temurin</vendor>
                  </jdk>
                  <testJdk>
                    <version>${surefire.toolchain.version}</version>
                    <vendor>temurin</vendor>
                  </testJdk>
                </toolchains>
              </configuration>
            </execution>
          </executions>
        </plugin>

            like to get an error. Currently we do, but if we add the extra <inherits> lines, we
            won't.

            I have one idea for a better approach, but it's painful, and I haven't tested it: We
            could postprocess Collect.gwt.xml to add <skip> lines for all the files that should be
            covered by testModule.gwt.xml. Maybe I'll try it someday.