// Project: UnitTests
// Module: teststring
// Source code file: StringTest.java
// The unittest class StringTest tests methods
// in the String class.
// No String class is defined in this
// module; use a fake class (e.g., FakeClass)
// to use for creating a test class.

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
class StringTest {
    private String s, t;

    // Initialize String objects to use in the
    // unit test methods test1, test2, and test3.
    @BeforeEach
    void setUp() {
        s = "elephant";
        t = "Dog";
    }

    // Test String toUpperCase method.
    @Test
    void test1( ) {
        assertEquals("ELEPHANT", s.toUpperCase());
        assertEquals("dog", t.toLowerCase());
    }

    // Test string concatenation.
    @Test
    void test2( ) {
        assertEquals("elephantDog", s.concat(t));
        assertEquals("elephantDog", s + t);
    }

    // Test String length method.
    @Test
    void test3( ) {
        assertEquals(8, s.length( ));
        assertEquals(3, t.length( ));
    }
}