Grails无法找到集成测试，除非我做了grails clean

Question

尝试运行集成测试会抛出null异常，除非我执行grails clean。

我执行以下命令序列

> grails
> test-app ShowIn  // throws NullPointer exception
> clean
> test-app ShowIn  // now the test magically passes

在命令序列期间，我没有在代码中改变任何内容。

我正在运行grails 2.3.7，groovy 2.2.0和jvm 1.6.0_35。

下面有更详细的输出：

| Completed 1 integration test, 1 failed in 0m 0s
| Compiling 1 source files.....
| Compiling 1 source files....
| Compiling 1 source files.....
| Error Fatal error running tests: null (Use --stacktrace to see the full trace)
| Tests FAILED  - view reports in C:\mroot\gplay\projects\ShowAdapterPOC4\target\test-reports
| Error Error running script test-app ShowIn: java.lang.NullPointerException (Use --stacktrace to see the full trace)
grails> exit
| Goodbye

| Application cleaned.

| Enter a script name to run. Use TAB for completion:
grails> test-app ShowIn
| Compiling 10 source files
| Compiling 16 source files.....
| Compiling 16 source files....
| Compiling 16 source files....
| Running 1 integration test... 1 of 1
2014-04-21 19:44:57,432 [main] DEBUG hibernate.SQL  -
    /* criteria query */ select
        this_.ShowId as ShowId0_0_
    from
        Shows this_
| Completed 1 integration test, 0 failed in 0m 0s
| Tests PASSED - view reports in C:\mroot\gplay\projects\ShowAdapterPOC4\target\test-reports
grails>


Here's the test


package showadapterpoc4



import spock.lang.*

import grails.test.spock.IntegrationSpec

class ShowInSpec extends IntegrationSpec {
//class ShowInSpec extends Specification{

    ShowInCongress showInCongress

    def setup() {
    }

    def cleanup() {
    }

    void "find shows in congress db"() {
        setup:
            def shows = ShowInCongress.list()
        expect:
            shows.size() > 0
    }
}

每次单元测试工作正常，但除非grails清理，否则无法找到集成测试。

测试正在进入域类。每次更改域类时我是否必须干净？

我可能做错了什么？每次需要运行集成测试时，如何避免grails干净？