Help message updater: specify the name of the updated file

src/main/java/fr/xephi/authme/command/executable/authme/UpdateHelpMessagesCommand.java

@@ -7,6 +7,7 @@ import fr.xephi.authme.service.HelpTranslationGenerator;
 import org.bukkit.command.CommandSender;
 
 import javax.inject.Inject;
+import java.io.File;
 import java.io.IOException;
 import java.util.List;
 
@@ -24,8 +25,8 @@ public class UpdateHelpMessagesCommand implements ExecutableCommand {
     @Override
     public void executeCommand(CommandSender sender, List<String> arguments) {
         try {
-            helpTranslationGenerator.updateHelpFile();
-            sender.sendMessage("Successfully updated the help file");
+            File updatedFile = helpTranslationGenerator.updateHelpFile();
+            sender.sendMessage("Successfully updated the help file '" + updatedFile.getName() + "'");
             helpMessagesService.reloadMessagesFile();
         } catch (IOException e) {
             sender.sendMessage("Could not update help file: " + e.getMessage());

src/main/java/fr/xephi/authme/service/HelpTranslationGenerator.java

@@ -44,15 +44,17 @@ public class HelpTranslationGenerator {
     /**
      * Updates the help file to contain entries for all commands.
      *
+     * @return the help file that has been updated
      * @throws IOException if the help file cannot be written to
      */
-    public void updateHelpFile() throws IOException {
+    public File updateHelpFile() throws IOException {
         String languageCode = settings.getProperty(PluginSettings.MESSAGES_LANGUAGE);
         File helpFile = new File(dataFolder, "messages/help_" + languageCode + ".yml");
         Map<String, Object> helpEntries = generateHelpMessageEntries();
 
         String helpEntriesYaml = exportToYaml(helpEntries);
         Files.write(helpFile.toPath(), helpEntriesYaml.getBytes(), StandardOpenOption.TRUNCATE_EXISTING);
+        return helpFile;
     }
 
     private static String exportToYaml(Map<String, Object> helpEntries) {

src/test/java/fr/xephi/authme/command/executable/authme/UpdateHelpMessagesCommandTest.java

@@ -0,0 +1,70 @@
+package fr.xephi.authme.command.executable.authme;
+
+import fr.xephi.authme.TestHelper;
+import fr.xephi.authme.command.help.HelpMessagesService;
+import fr.xephi.authme.service.HelpTranslationGenerator;
+import org.bukkit.command.CommandSender;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Collections;
+
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyZeroInteractions;
+
+/**
+ * Test for {@link UpdateHelpMessagesCommand}.
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class UpdateHelpMessagesCommandTest {
+
+    @InjectMocks
+    private UpdateHelpMessagesCommand command;
+
+    @Mock
+    private HelpTranslationGenerator helpTranslationGenerator;
+    @Mock
+    private HelpMessagesService helpMessagesService;
+
+    @BeforeClass
+    public static void setUpLogger() {
+        TestHelper.setupLogger();
+    }
+
+    @Test
+    public void shouldUpdateHelpMessage() throws IOException {
+        // given
+        File updatedFile = new File("some/path/help_xx.yml");
+        given(helpTranslationGenerator.updateHelpFile()).willReturn(updatedFile);
+        CommandSender sender = mock(CommandSender.class);
+
+        // when
+        command.executeCommand(sender, Collections.emptyList());
+
+        // then
+        verify(helpMessagesService).reloadMessagesFile();
+        verify(sender).sendMessage("Successfully updated the help file 'help_xx.yml'");
+    }
+
+    @Test
+    public void shouldCatchAndReportException() throws IOException {
+        // given
+        given(helpTranslationGenerator.updateHelpFile()).willThrow(new IOException("Couldn't do the thing"));
+        CommandSender sender = mock(CommandSender.class);
+
+        // when
+        command.executeCommand(sender, Collections.emptyList());
+
+        // then
+        verify(sender).sendMessage("Could not update help file: Couldn't do the thing");
+        verifyZeroInteractions(helpMessagesService);
+    }
+}