add a test unit and a css file of PaintCalendarStrategy

app/src/main/resources/css/calendar.css

@@ -0,0 +1,7 @@
+.calendar_today {
+    -fx-text-fill: red;
+}
+.calendar_have_todo {
+    -fx-border-color: blue;
+    -fx-border-width: 3px;
+}

app/src/test/java/org/cutem/cutecalendar/presenter/PaintCalendarStrategyTest.java

@@ -0,0 +1,118 @@
+package org.cutem.cutecalendar.presenter;
+
+import javafx.application.Application;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.TextField;
+import javafx.scene.layout.GridPane;
+import javafx.scene.layout.VBox;
+import javafx.stage.Stage;
+import org.cutem.cutecalendar.model.TodoItem;
+import org.cutem.cutecalendar.model.TodoItemFactory;
+import org.cutem.cutecalendar.model.TodoItemManager;
+import org.jetbrains.annotations.NotNull;
+import org.junit.After;
+import org.junit.Before;
+
+import java.util.Calendar;
+import java.util.List;
+
+public class PaintCalendarStrategyTest extends Application {
+
+    private Stage stage;
+    private TodoItemManager manager = TodoItemManager.getInstance();
+    private ClassLoader mClassLoader = getClass().getClassLoader();
+
+    @Before
+    public void setUp() {
+    }
+
+    @After
+    public void tearDown() {
+    }
+
+    @Override
+    public void start(Stage primaryStage) {
+        stage = primaryStage;
+        testPaintCalendar();
+        primaryStage.show();
+    }
+
+
+    public void testPaintCalendar() {
+
+        TextField y = new TextField();
+        TextField m = new TextField();
+
+        GridPane gridPane = new GridPane();
+        gridPane.getStylesheets().add(
+                mClassLoader.getResource("css/calendar.css").toExternalForm()
+        );
+
+        PaintCalendarStrategy paintCalendarStrategy = new PaintCalendarStrategy(
+                gridPane, y, m
+        );
+        PresenterImpl presenter = new PresenterImpl(paintCalendarStrategy);
+        paintCalendarStrategy.attachPresenter(presenter);
+
+        TodoItem item = getATodoItem();
+        System.out.println(item.getId());
+        System.out.println(manager.get(item.getId()) == item);
+
+
+        Button todayBtn = new Button("today");
+        todayBtn.setOnAction(e -> paintCalendarStrategy.onClickToday());
+        Button searchBtn = new Button("goto");
+        searchBtn.setOnAction(e -> paintCalendarStrategy.onClickSearch());
+
+        stage.setScene(new Scene(new VBox(y, m, gridPane, todayBtn, searchBtn)));
+    }
+
+    private TodoItem getATodoItem() {
+        TodoItemFactory factory = new TodoItemFactory();
+        factory.title("test title");
+        factory.wholeDay(Calendar.getInstance());
+        factory.personnel("lyq");
+
+        TodoItem item = factory.build();
+        manager.add(item);
+
+        return item;
+    }
+
+    private static class PresenterImpl extends Presenter {
+
+        private PaintCalendarStrategy mPaintCalendarStrategy;
+
+        public PresenterImpl(@NotNull PaintCalendarStrategy paintCalendarStrategy) {
+            mPaintCalendarStrategy = paintCalendarStrategy;
+        }
+
+        @Override
+        protected Calendar getCalendarShowingDate() {
+            return mPaintCalendarStrategy.getCalendarShowingDate();
+        }
+
+        @Override
+        protected void showTodoItemDetail(TodoItem item) {
+        }
+
+        @Override
+        protected void showNewTodoItemStage() {
+        }
+
+        @Override
+        protected void paintCalendar(@NotNull Calendar date, @NotNull List<CalendarUnit> days) {
+            mPaintCalendarStrategy.paintCalendar(date, days);
+        }
+
+        @Override
+        protected void listTodoItems(List<TodoItem> items) {
+        }
+
+        @Override
+        protected void showAlert(int type, String text) {
+        }
+
+    }
+}