Created TranslateTextTest class.

Closes #3488374

The provided Drupal unit test, TranslateTextTest, focuses on testing the functionality of two classes: TranslateTextInput and TranslateTextOutput. These classes are part of a module named ai, specifically within the OperationType\TranslateText namespace. The tests ensure that these classes can be properly created with valid input data and that their methods return expected results.

Here's a summary of each test case:

1. Test Case: testTranslateTextInputCreation

   • Purpose: This test verifies that an instance of TranslateTextInput is created correctly.
   • Input: A string 'Hello, world!', source language 'en', and target language 'es'.
   • Expected Output:
     • The toString() and (string) methods should return the original text `'Hello, world!'.
     • The getSourceLanguage() method should return the source language 'en'.
     • The getTargetLanguage() method should return the target language 'es'.
   • Additional Test: The test also checks that the source and target languages can be updated using the setSourceLanguage and setTargetLanguage methods.

2. Test Case: testTranslateTextOutputCreation

   • Purpose: This test verifies that an instance of TranslateTextOutput is created correctly.
   • Input:
     • A normalized string '¡Hola, mundo!', a raw output array containing the translated text, and metadata with a confidence level.
   • Expected Output:
     • The getNormalized() method should return the normalized text `'¡Hola, mundo!'.
     • The getRawOutput() method should return the raw output array.
     • The getMetadata() method should return the metadata.
   • Additional Test: The test also checks that the output can be converted to an associative array using the toArray method.

Summary

• The tests ensure that both TranslateTextInput and TranslateTextOutput classes handle their properties and methods as expected.
• They verify the proper creation of instances with correct data.
• Additional tests check for mutability of source/target languages in the input class and conversion to array format in the output class.