LinearTransformation transformation = LinearTransformation.mapping(x1, y1).withSlope(slope);
    assertDiagonalLinearTransformation(transformation, x1, y1, xDelta, xDelta * slope);
  }

  public void testMappingWithSlope_horizontal() {
    double x1 = 1.2;
    double y = 5.6;
    LinearTransformation transformation = LinearTransformation.mapping(x1, y).withSlope(0.0);
    assertHorizontalLinearTransformation(transformation, y);
  }

    LinearTransformation transformation = LinearTransformation.mapping(x1, y1).withSlope(slope);
    assertDiagonalLinearTransformation(transformation, x1, y1, xDelta, xDelta * slope);
  }

  public void testMappingWithSlope_horizontal() {
    double x1 = 1.2;
    double y = 5.6;
    LinearTransformation transformation = LinearTransformation.mapping(x1, y).withSlope(0.0);
    assertHorizontalLinearTransformation(transformation, y);
  }

    private Dependency injectDependency(Dependency d) {
        // we cannot set this directly in the MDO due to the interactions with dependency management
        return (d.getScope() == null || d.getScope().isEmpty()) ? d.withScope("compile") : d;
    }

    /**
     * Returns a list suited for the builders, i.e. null if not modified
     */
    private <T> List<T> injectList(List<T> list, Function<T, T> modifer) {