@Issue(['GRADLE-2440', 'GRADLE-2579'])
    def 'stale output file is removed after input source directory is emptied.'() {
        def taskWithSources = new TaskWithSources()
        taskWithSources.createInputs()
        buildScript(taskWithSources.buildScript)

        when:
        succeeds(taskWithSources.taskPath)

        then:
        taskWithSources.outputFile.exists()

  for (int i = 0; i < ninputs; ++i) {
    // TODO(skyewm): prefix names with underscore (requires some plumbing)
    if (!CreateInput(inputs[i], cond_graph, StrCat("cond_input", i).c_str(),
                     &cond_inputs[i], status)) {
      break;
    }
    if (!CreateInput(inputs[i], body_graph, StrCat("body_input", i).c_str(),
                     &body_inputs[i], status)) {
      break;
    }
  }