package util; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; import java.util.Arrays; import java.util.Collections; import org.junit.Test; public class UtilTest { @Test public void removePrefix() { assertEquals("World", Util.removePrefixSafely("Hello World", "Hello ")); assertEquals("Hello World", Util.removePrefixSafely("Hello World", "NotPrefix")); } @Test public void join() { assertEquals("a, b, c", Util.join(Arrays.asList("a", "b", "c"), ", ")); assertEquals("1, 2, 3", Util.join(Arrays.asList(1,2,3), ", ")); // Empty collections, empty elements assertEquals("", Util.join(Collections.emptyList(), "---")); assertEquals("", Util.join(Arrays.asList(""), "---")); assertEquals("---", Util.join(Arrays.asList("", ""), "---")); } @Test public void escapeNull() { assertEquals("xyz", Util.escapeNull("xyz", "abc")); assertEquals("abc", Util.escapeNull(null, "abc")); } @Test public void equals() { assertTrue(Util.equals("123", "123")); assertTrue(Util.equals(null, null)); assertFalse(Util.equals("123", null)); assertFalse(Util.equals(null, "123")); } }