/** Test artifact copy between matrix jobs, for artifact from matching axis */
 public void testMatrixToMatrix() throws Exception {
   MatrixProject other = createMatrixArtifactProject(), p = createMatrixProject();
   p.setAxes(new AxisList(new Axis("FOO", "one", "two"))); // should match other job
   p.getBuildersList()
       .add(
           new CopyArtifact(
               other.getName() + "/FOO=$FOO",
               new StatusBuildSelector(true),
               "",
               "",
               false,
               false));
   assertBuildStatusSuccess(other.scheduleBuild2(0, new UserCause()).get());
   MatrixBuild b = p.scheduleBuild2(0, new UserCause()).get();
   assertBuildStatusSuccess(b);
   MatrixRun r = b.getRun(new Combination(Collections.singletonMap("FOO", "one")));
   assertFile(true, "one.txt", r);
   assertFile(false, "two.txt", r);
   r = b.getRun(new Combination(Collections.singletonMap("FOO", "two")));
   assertFile(false, "one.txt", r);
   assertFile(true, "two.txt", r);
 }
 @Override
 public AbstractBuild<?, ?> resolveChild(Child child) {
   MatrixBuild b = (MatrixBuild) owner;
   return b.getRun(Combination.fromString(child.name));
 }