JUnit assumptions fail Theories

问题

I was messing arround with JUnit @Theory and find out that assumeTrue(false) fails the theory instrad if ignore it.

This code fail the test:

@RunWith(Theories.class)
public class SnippetTest {

   @Theory
   public void validateIndices(){
       assumeTrue(false);
   }
}

SnippetTest.validateIndices Never found parameters that satisfied method assumptions. Violated assumptions: [org.junit.AssumptionViolatedException: got: false, expected: is true]

But when I'm using @Test assumption ignore it.

public class SnippetTest {

    @Test
    public void validateIndices() {
        assumeTrue(false);
    }
}

It's contraversial with Theories Documentation.

If any of the assumptions fail, the data point is silently ignored.

What am I missing or what am doing wrong?

回答1:

Thanks to @TamasRev comment I found what was going wrong. Looks like, it will fail the test in case all the the assumption fails. Im the case I posted, I have only one assumption. What is happening if I'm using @DataPoints? This one fails as well

@RunWith(Theories.class)
public class SnippetTest {

    @DataPoints
    public static boolean[] data(){
        return new boolean[]{false, false};
    }

   @Theory
   public void validateIndices(boolean data){
       assumeTrue(data);
       assertTrue(true);
   }
}

But when if at least one assumption pass then test is not failed.

@RunWith(Theories.class)
public class SnippetTest {

    @DataPoints
    public static boolean[] data(){
        return new boolean[]{false, true};
    }

   @Theory
   public void validateIndices(boolean data){
       assumeTrue(data);
       assertTrue(true);
   }
}

Thanx @TamasRev for pointing me to right direction.

来源：https://stackoverflow.com/questions/37572980/junit-assumptions-fail-theories