Create tests for CommandRegistry

telegrambots-extensions/src/test/java/org/telegram/telegrambots/extensions/bots/commandbot/commands/CommandRegistryTest.java

@@ -0,0 +1,42 @@
+package org.telegram.telegrambots.extensions.bots.commandbot.commands;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.telegram.telegrambots.meta.api.objects.Message;
+import org.telegram.telegrambots.meta.bots.AbsSender;
+
+class CommandRegistryTest {
+
+    @Test
+    void should_executes_commandWithBotUsername() {
+        CommandRegistry registry = new CommandRegistry(true, () -> "BotUsername");
+        IBotCommand command = Mockito.mock(IBotCommand.class);
+        Mockito.when(command.getCommandIdentifier()).thenReturn("command");
+        registry.register(command);
+        AbsSender absSender = Mockito.mock(AbsSender.class);
+        Message message = Mockito.mock(Message.class);
+        Mockito.when(message.hasText()).thenReturn(true);
+        Mockito.when(message.getText()).thenReturn("/command@BotUsername I'll be test!");
+        Assertions.assertTrue(registry.executeCommand(absSender, message), "Command must be executed");
+        Mockito.verify(message).hasText();
+        Mockito.verify(message).getText();
+        Mockito.verify(command).processMessage(
+                Mockito.same(absSender), Mockito.same(message), Mockito.eq(new String[]{"I'll", "be", "test!"}));
+    }
+
+    @Test
+    void should_throws_NPE_on_executes_commandWithNullableBotUsername() {
+        CommandRegistry registry = new CommandRegistry(true, () -> null);
+        IBotCommand command = Mockito.mock(IBotCommand.class);
+        Mockito.when(command.getCommandIdentifier()).thenReturn("command");
+        registry.register(command);
+        AbsSender absSender = Mockito.mock(AbsSender.class);
+        Message message = Mockito.mock(Message.class);
+        Mockito.when(message.hasText()).thenReturn(true);
+        Mockito.when(message.getText()).thenReturn("/command@BotUsername ignore");
+        NullPointerException exception = Assertions.assertThrows(
+                NullPointerException.class, () -> registry.executeCommand(absSender, message), "Bot username is null");
+        Assertions.assertEquals("Bot username must not be null", exception.getMessage(), "Invalid exception message");
+    }
+}