Add test templates

src/test/java/app/controllers/EditorControllerTest.java

@@ -0,0 +1,238 @@
+package app.controllers;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.fxmisc.richtext.CodeArea;
+import org.fxmisc.richtext.model.StyleSpans;
+
+import com.google.common.eventbus.EventBus;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.mockStatic;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockedStatic;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import app.testing.FxTestTemplate;
+import app.model.Model;
+import app.model.ProgrammingLanguage;
+import app.service.LanguageOperations;
+import app.events.CopyEvent;
+import app.events.CutEvent;
+import app.events.FileSelectedEvent;
+import app.events.LanguageChangedEvent;
+import app.events.PasteEvent;
+import app.events.RedoEvent;
+import app.events.ToggleCommentEvent;
+import app.events.ToggleWrapTextEvent;
+import app.events.UndoEvent;
+
+@ExtendWith(MockitoExtension.class)
+public class EditorControllerTest extends FxTestTemplate {
+
+
+  @Captor
+  private ArgumentCaptor<String> captor;
+
+  @Mock
+  private CodeArea editor;
+
+  private EventBus eventBus;
+
+  @InjectMocks
+  private EditorController controller;
+
+  private String mockContent = """
+  class HelloWorld {
+    private String message = "Hello world";
+
+    public String getMessage() {
+      return message;
+    }
+  }
+  """;
+
+  private String mockLine = "private String message = \"Hello world\";";
+
+  @BeforeEach
+  public void insertEventBus() {
+    this.eventBus = new EventBus();
+    this.controller.setEventBus(eventBus);
+  }
+
+  @Test
+  @DisplayName("Test handling of FileSelectedEvent with a real file")
+  public void testFileSelectedEventWithRealFile() throws IOException {
+
+    String resourcePath = "/testfile.txt";
+    String filePath = getClass().getResource(resourcePath).getPath();
+    File file = new File(filePath);
+    List<String> content =
+      Files.readAllLines(file.toPath())
+        .stream()
+        .map(s -> s + "\n")
+        .collect(Collectors.toList());
+
+    eventBus.post(new FileSelectedEvent(filePath));
+    verify(editor, times(content.size())).appendText(captor.capture());
+
+    assertEquals(content, captor.getAllValues());
+  }
+
+  @Test
+  @DisplayName("Test handling of FileSelectedEvent with a file that doesn't exist")
+  public void testFileSelectedEventWithUnrealFile() throws IOException {
+
+    String brokenFilePath = "/doesNotExist.txt";
+    eventBus.post(new FileSelectedEvent(brokenFilePath));
+
+    verify(editor, never()).clear();
+  }
+
+  @Test
+  @DisplayName("Test handling of LanguageChangedEvent")
+  public void testLanguageChangedEvent(){
+
+    when(editor.getText()).thenReturn(mockContent);
+
+    try (MockedStatic<LanguageOperations> mocked = mockStatic(LanguageOperations.class)) {
+      mocked.when(() -> LanguageOperations.syntaxHighlight(anyString(), any()))
+        .thenReturn(StyleSpans.singleton(null, 0));
+
+      eventBus.post(new LanguageChangedEvent("markdown"));
+      mocked.verify(() -> LanguageOperations.syntaxHighlight(anyString(), any()));
+    }
+  }
+
+  @Test
+  @DisplayName("Test handling of ToggleCommentEvent when not selected")
+  public void testToggleCommentEventNotSelect(){
+
+    ProgrammingLanguage lang = mock(ProgrammingLanguage.class);
+    when(editor.getSelectedText()).thenReturn("");
+    when(editor.getText(anyInt())).thenReturn(mockLine);
+
+    try (MockedStatic<Model> mocked = mockStatic(Model.class)) {
+      mocked.when(() -> Model.getLanguage()).thenReturn(lang);
+
+      when(lang.isCommentedLine(anyString())).thenReturn(false);
+      eventBus.post(new ToggleCommentEvent());
+      verify(lang).commentLine(anyString());
+
+      when(lang.isCommentedLine(anyString())).thenReturn(true);
+      eventBus.post(new ToggleCommentEvent());
+      verify(lang).unCommentLine(anyString());
+    }
+  }
+
+  @Test
+  @DisplayName("Test handling of ToggleCommentEvent when selected")
+  public void testToggleCommentEventSelect(){
+
+    ProgrammingLanguage lang = mock(ProgrammingLanguage.class);
+    when(editor.getSelectedText()).thenReturn("Selected Text");
+
+    try (MockedStatic<Model> mocked = mockStatic(Model.class)) {
+      mocked.when(() -> Model.getLanguage()).thenReturn(lang);
+
+      when(lang.isCommentedSelection(anyString())).thenReturn(false);
+      eventBus.post(new ToggleCommentEvent());
+      verify(lang).commentSelection(anyString());
+
+      when(lang.isCommentedSelection(anyString())).thenReturn(true);
+      eventBus.post(new ToggleCommentEvent());
+      verify(lang).unCommentSelection(anyString());
+    }
+  }
+
+  @Test
+  @DisplayName("Test handling of ToggleWrapTextEvent")
+  public void testToggleWrapTextEvent(){
+    eventBus.post(new ToggleWrapTextEvent(true));
+    verify(editor).setWrapText(true);
+    eventBus.post(new ToggleWrapTextEvent(false));
+    verify(editor).setWrapText(false);
+  }
+
+  @Test
+  @DisplayName("Test handling of UndoEvent")
+  public void testUndoEvent(){
+    when(editor.isFocused()).thenReturn(true);
+    eventBus.post(new UndoEvent());
+    verify(editor, times(1)).undo();
+
+    when(editor.isFocused()).thenReturn(false);
+    eventBus.post(new UndoEvent());
+    // Should not have been called one more time
+    verify(editor, times(1)).undo();
+  }
+
+  @Test
+  @DisplayName("Test handling of RedoEvent")
+  public void testRedoEvent(){
+    when(editor.isFocused()).thenReturn(true);
+    eventBus.post(new RedoEvent());
+    verify(editor, times(1)).redo();
+
+    when(editor.isFocused()).thenReturn(false);
+    eventBus.post(new RedoEvent());
+    verify(editor, times(1)).redo();
+  }
+  
+  @Test
+  @DisplayName("Test handling of CopyEvent")
+  public void testCopyEvent(){
+    when(editor.isFocused()).thenReturn(true);
+    eventBus.post(new CopyEvent());
+    verify(editor, times(1)).copy();
+
+    when(editor.isFocused()).thenReturn(false);
+    eventBus.post(new CopyEvent());
+    verify(editor, times(1)).copy();
+  }
+
+  @Test
+  @DisplayName("Test handling of CutEvent")
+  public void testCutEvent(){
+    when(editor.isFocused()).thenReturn(true);
+    eventBus.post(new CutEvent());
+    verify(editor, times(1)).cut();
+
+    when(editor.isFocused()).thenReturn(false);
+    eventBus.post(new CutEvent());
+    verify(editor, times(1)).cut();
+  }
+
+  @Test
+  @DisplayName("Test handling of PasteEvent")
+  public void testPasteEvent(){
+    when(editor.isFocused()).thenReturn(true);
+    eventBus.post(new PasteEvent());
+    verify(editor, times(1)).paste();
+
+    when(editor.isFocused()).thenReturn(false);
+    eventBus.post(new PasteEvent());
+    verify(editor, times(1)).paste();
+  }
+}