/**
* Use forEach, with the given StringBuilder, to assemble a String which represents every Shape in
* the given list.
*
* <p>Change the 'method under test' to make the test pass.
*
* <p>The String should be a concatenation of each Shape's toString.
*
* @see Shapes#makeStringOfAllColors(java.util.List, StringBuilder)
* @see Shape#toString()
* @see StringBuilder#append(String)
* @see Iterable#forEach
*/
@Test
public void buildStringRepresentingAllShapes() {
List<Shape> allMyShapes = Arrays.asList(new Shape(RED), new Shape(BLACK), new Shape(YELLOW));
StringBuilder builder = new StringBuilder();
// method under test
Shapes.makeStringOfAllColors(allMyShapes, builder);
assertThat(builder.toString(), equalTo("[a RED shape][a BLACK shape][a YELLOW shape]"));
}
/**
* Use forEach to change the color of every shape to RED.
*
* <p>Change the 'method under test' to make the test pass.
*
* @see Shapes#colorAll(java.util.List, Color)
* @see Iterable#forEach
* @see Shape#setColor(Color)
*/
@Test
public void changeColorOfAllShapes() {
List<Shape> myShapes = Arrays.asList(new Shape(BLUE), new Shape(BLACK), new Shape(YELLOW));
// method under test
Shapes.colorAll(myShapes, RED);
assertThat(myShapes, hasSize(3));
assertThat(myShapes, everyItem(hasColor(RED)));
}
/**
* 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]"));
}