Add tests for LogoutCommand and RegisterCommand. Add more generic mockUtil

src/test/java/fr/xephi/authme/AuthMeMockUtil.java

@@ -1,5 +1,6 @@
 package fr.xephi.authme;
 
+import fr.xephi.authme.settings.Messages;
 import org.mockito.Mockito;
 
 import java.lang.reflect.Field;
@@ -14,17 +15,35 @@ public final class AuthMeMockUtil {
     }
 
     /**
-     * Set the AuthMe plugin instance to a mock object. Use {@link AuthMe#getInstance()} to retrieve the mock.
+     * Sets the AuthMe plugin instance to a mock object. Use {@link AuthMe#getInstance()} to retrieve the mock.
      */
-    public static void initialize() {
+    public static void mockAuthMeInstance() {
         AuthMe mock = Mockito.mock(AuthMe.class);
+        mockSingletonForClass(AuthMe.class, "plugin", mock);
+    }
 
+    /**
+     * Creates a mock Messages object for the instance returned from {@link Messages#getInstance()}.
+     */
+    public static void mockMessagesInstance() {
+        Messages mock = Mockito.mock(Messages.class);
+        mockSingletonForClass(Messages.class, "singleton", mock);
+    }
+
+    /**
+     * Sets a field of a class to the given mock.
+     *
+     * @param clazz the class to modify
+     * @param fieldName the field name
+     * @param mock the mock to set for the given field
+     */
+    private static void mockSingletonForClass(Class<?> clazz, String fieldName, Object mock) {
         try {
-            Field instance = AuthMe.class.getDeclaredField("plugin");
+            Field instance = clazz.getDeclaredField(fieldName);
             instance.setAccessible(true);
             instance.set(null, mock);
         } catch (NoSuchFieldException | IllegalAccessException e) {
-            throw new RuntimeException("Could not initialize AuthMe mock", e);
+            throw new RuntimeException("Could not set mock instance for class " + clazz.getName(), e);
         }
     }
 }

src/test/java/fr/xephi/authme/command/executable/login/LoginCommandTest.java

@@ -12,8 +12,10 @@ import org.junit.Before;
 import org.junit.Test;
 import org.mockito.Mockito;
 
-
-import static org.mockito.Matchers.*;
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyBoolean;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 
@@ -26,7 +28,7 @@ public class LoginCommandTest {
 
     @Before
     public void initializeAuthMeMock() {
-        AuthMeMockUtil.initialize();
+        AuthMeMockUtil.mockAuthMeInstance();
         AuthMe pluginMock = AuthMe.getInstance();
 
         Settings.captchaLength = 10;

src/test/java/fr/xephi/authme/command/executable/logout/LogoutCommandTest.java

@@ -0,0 +1,62 @@
+package fr.xephi.authme.command.executable.logout;
+
+import fr.xephi.authme.AuthMe;
+import fr.xephi.authme.AuthMeMockUtil;
+import fr.xephi.authme.command.CommandParts;
+import fr.xephi.authme.process.Management;
+import fr.xephi.authme.settings.Settings;
+import org.bukkit.command.BlockCommandSender;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+
+/**
+ * Test for {@link LogoutCommand}.
+ */
+public class LogoutCommandTest {
+
+    private static Management managementMock;
+
+    @Before
+    public void initializeAuthMeMock() {
+        AuthMeMockUtil.mockAuthMeInstance();
+        AuthMe pluginMock = AuthMe.getInstance();
+
+        Settings.captchaLength = 10;
+        managementMock = mock(Management.class);
+        Mockito.when(pluginMock.getManagement()).thenReturn(managementMock);
+    }
+
+    @Test
+    public void shouldStopIfSenderIsNotAPlayer() {
+        // given
+        CommandSender sender = mock(BlockCommandSender.class);
+        LogoutCommand command = new LogoutCommand();
+
+        // when
+        command.executeCommand(sender, new CommandParts(), new CommandParts());
+
+        // then
+        Mockito.verify(managementMock, never()).performLogout(any(Player.class));
+    }
+
+    @Test
+    public void shouldCallManagementForPlayerCaller() {
+        // given
+        Player sender = mock(Player.class);
+        LogoutCommand command = new LogoutCommand();
+
+        // when
+        command.executeCommand(sender, new CommandParts(), new CommandParts("password"));
+
+        // then
+        Mockito.verify(managementMock).performLogout(sender);
+    }
+
+}

src/test/java/fr/xephi/authme/command/executable/register/RegisterCommandTest.java

@@ -0,0 +1,88 @@
+package fr.xephi.authme.command.executable.register;
+
+import fr.xephi.authme.AuthMe;
+import fr.xephi.authme.AuthMeMockUtil;
+import fr.xephi.authme.command.CommandParts;
+import fr.xephi.authme.process.Management;
+import fr.xephi.authme.settings.Messages;
+import fr.xephi.authme.settings.Settings;
+import org.bukkit.command.BlockCommandSender;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mockito;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+
+/**
+ * Test for {@link RegisterCommand}.
+ */
+public class RegisterCommandTest {
+
+    private static Management managementMock;
+    private static Messages messagesMock;
+
+    @Before
+    public void initializeAuthMeMock() {
+        AuthMeMockUtil.mockMessagesInstance();
+        messagesMock = Messages.getInstance();
+
+        AuthMeMockUtil.mockAuthMeInstance();
+        AuthMe pluginMock = AuthMe.getInstance();
+
+        Settings.captchaLength = 10;
+        managementMock = mock(Management.class);
+        Mockito.when(pluginMock.getManagement()).thenReturn(managementMock);
+    }
+
+    @Test
+    public void shouldNotRunForNonPlayerSender() {
+        // given
+        CommandSender sender = mock(BlockCommandSender.class);
+        RegisterCommand command = new RegisterCommand();
+        ArgumentCaptor<String> messageCaptor = ArgumentCaptor.forClass(String.class);
+
+        // when
+        command.executeCommand(sender, new CommandParts(), new CommandParts());
+
+        // then
+        verify(sender).sendMessage(messageCaptor.capture());
+        assertThat(messageCaptor.getValue().contains("Player Only!"), equalTo(true));
+        verify(managementMock, never()).performRegister(any(Player.class), anyString(), anyString());
+    }
+
+    @Test
+    public void shouldFailForEmptyArguments() {
+        // given
+        CommandSender sender = mock(Player.class);
+        RegisterCommand command = new RegisterCommand();
+
+        // when
+        command.executeCommand(sender, new CommandParts(), new CommandParts());
+
+        // then
+        verify(messagesMock).send(sender, "usage_reg");
+        verify(managementMock, never()).performRegister(any(Player.class), anyString(), anyString());
+    }
+
+    @Test
+    public void shouldForwardRegister() {
+        // given
+        Player sender = mock(Player.class);
+        RegisterCommand command = new RegisterCommand();
+
+        // when
+        command.executeCommand(sender, new CommandParts(), new CommandParts("password"));
+
+        // then
+        verify(managementMock).performRegister(sender, "password", "");
+    }
+}