Fix NPE in ReplaceChildrenControllerTest

src/test/java/org/leumasjaffe/recipe/controller/ReplaceChildrenControllerTest.java

@@ -22,7 +22,7 @@ class ReplaceChildrenControllerTest {
 	
 	@Mock Container parent;
 	Function<Void, Collection<Void>> getChildren = (v) -> Arrays.asList(null, null);
-	Function<Void, Component> makeView = (v) -> null;
+	Function<Void, Component> makeView = (v) -> mock(Component.class);
 	ReplaceChildrenController<Void, Void> controller;
 	
 	@BeforeEach
@@ -32,7 +32,7 @@ class ReplaceChildrenControllerTest {
 
 	@Test
 	void testDoesNotReplaceComponentsWhenNoSizeChange() {
-		doReturn(new Component[2]).when(parent).getComponents();
+		doReturn(new Component[] { mock(Component.class), mock(Component.class) }).when(parent).getComponents();
 		
 		controller.accept(parent, null);
 		
@@ -42,7 +42,7 @@ class ReplaceChildrenControllerTest {
 
 	@Test
 	void testReplacesComponents() {
-		doReturn(new Component[1]).when(parent).getComponents();
+		doReturn(new Component[] { mock(Component.class) }).when(parent).getComponents();
 		
 		controller.accept(parent, null);