/**
* Use forEach to change the color, and build a string showing the old colors of each shape.
*
* <p>Try to perform both actions using a single call to forEach.
*
* @see Shapes#changeColorAndMakeStringOfOldColors
* @see Shape#getColor()
* @see Color#name()
* @see StringBuilder#append(String)
*/
@Test
public void changeColorOfAllShapes_AND_buildStringShowingAllTheOldColors() {
List<Shape> myShapes = Arrays.asList(new Shape(BLUE), new Shape(BLACK), new Shape(YELLOW));
StringBuilder builder = new StringBuilder();
Shapes.changeColorAndMakeStringOfOldColors(myShapes, RED, builder);
assertThat(myShapes, hasSize(3));
assertThat(myShapes, everyItem(hasColor(RED)));
assertThat(builder.toString(), equalTo("[a BLUE shape][a BLACK shape][a YELLOW shape]"));
}
