google3/third_party/java_src/junit/test/java/org/junit/tests/experimental/theories/TestedOnSupplierTest.java

package org.junit.tests.experimental.theories;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;

import java.lang.reflect.Method;
import java.util.List;

import org.junit.Test;
import org.junit.experimental.theories.ParameterSignature;
import org.junit.experimental.theories.PotentialAssignment;
import org.junit.experimental.theories.suppliers.TestedOn;
import org.junit.experimental.theories.suppliers.TestedOnSupplier;

public class TestedOnSupplierTest {

    public void foo(@TestedOn(ints = {1}) int x) {
    }

    @Test
    public void descriptionStatesParameterName() throws Exception {
        TestedOnSupplier supplier = new TestedOnSupplier();
        List<PotentialAssignment> assignments = supplier.getValueSources(signatureOfFoo());
        assertThat(assignments.get(0).getDescription(), is("\"1\" <from ints>"));
    }

    private ParameterSignature signatureOfFoo() throws NoSuchMethodException {
        Method method = getClass().getMethod("foo", int.class);
        return ParameterSignature.signatures(method).get(0);
    }

}