Adding a #Test method dynamically to junit test class - junit

Question

We have a text file where a list of search query and the expected result is given. Such as,
Search Result
a:120 result1
b:220 result2
.....
.....
Now, we need to write a JUnit (heavily used in our daily build) test class, where each of the row will represent one #Test method. So by that, we know, which search case failed (UI).
We already have a solution, where we have one #Test method only, and we have log to check which case passed or failed.
But, we are trying to achieve per case represented as a junit method. Is it really possible, to dynamically create a #Test method to JUnit architecture.
Our, #Test method is same for every search case. That means, we just want to pass a different parameter every time.
I have come up with a JUnit3 solution to my problem. Need help to translate it to Junit4.
public static Test suite()
{
TestSuite suite = new TestSuite();
for ( int i = 1; i <= 5; i++ ) {
final int j = i;
suite.addTest(
new Test1( "testQuery" + i ) {
protected void runTest()
{
try {
testQuery( j );
} catch ( MalformedURLException e ) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch ( SolrServerException e ) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
);
}
return suite;
}

Answer 1

In JUnit 4 there is a concept called "Parameterized Test" that is used for exactly this.
I don't fully understand your test above, but this should give you a hint:
#RunWith(Parameterized.class)
public class ParameterizedTest {
private String query;
private String expectedResult;
public ParameterizedTest(String query, String expectedResult) {
this.query = datum;
this.expectedResult = expectedResult;
}
#Parameters
public static Collection<Object[]> generateData() {
Object[][] data = {
{ "a:120", "result1" },
{ "b:220", "result2" },
};
return Arrays.asList(data);
}
#Test
public void checkQueryResult() {
System.out.println("Checking that the resutl for query " + query + " is " + expectedResult);
// ...
}
}