Thursday, June 27, 2013

Running GWT JUNIT programatically

I'm having some trouble testing my application. We have some pretty complex hierarchical data being created and to do effective testing I want to put the Database into a known state before running any tests, whether that's empty or with a predefined set of data depends on the specific tests being run.

GWT Junit tests don't allow you to perform async requests during the beforeMethod.

To try and get around some of this I'm trying to run all my junit tests from my own handler. The process works kind of like this:

A. load the list of GWTTestCases
B. Ask each test whether it wants an empty database or a predefined data set in the DB and create the preconditions. All my tests extend a base class which extends GWTTestCase and has a series of flags that let it
specify the required DB state.
C. run the GWTTestCases as normal.

The first 2 steps are pretty straightforward but the third one is throwing me. I can't get any of the tests to run.
I'm sure I'm not running the tests properly.

I'm getting a combination of errors both:

The test class '' was not found in module ''; no compilation unit for that type was seen


GWTTestCases require a name; "null(" has none.  Perhaps you used TestSuite.addTest() instead of addTestClass()?

Can anyone give me some guidance in how to run the GWT unit tests programatically? Also should I be running the tests class by class or should I use reflection to try and run them method by method? I'm not really sure how normal tools handle these issues.

Any help would be greatly appreciated

My class looks like this:

public class NewApproach
    private ServersService ss;
    private List<TestBase> tests;
    private void loadTests()
        tests = new ArrayList<TestBase>();
        tests.add(new DummyTest());
    private void clean() throws Exception
        ss = new ServersService();
    private TestResult runTest(TestBase tests) throws Exception
        TestResult tr = new TestResult();;
        return tr;
    private void printResults(TestResult tr)
        int passes = tr.runCount() - (tr.failureCount() + tr.errorCount());
        System.out.println("Ran " + tr.runCount() + " tests " + passes + " passed");
            TestFailure tf  = tr.errors().nextElement();
            System.out.println(tf.failedTest().toString() + " error");
            TestFailure tf  = tr.failures().nextElement();
            System.out.println(tf.failedTest().toString() + " failed");
    public void runTests() throws Exception
        for(TestBase test: tests)
            TestResult tr = runTest(test);
    public static void main(String[] args) throws Exception
        NewApproach na = new NewApproach();

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