JAVA-12359 Committing Test Cases for Colon and Slash Characters

Author: anuragkumawat

core-java-modules/core-java-string-operations-3/src/test/java/com/baeldung/stringfilenamevalidaiton/StringFilenameValidationUnitTest.java

@@ -26,6 +26,9 @@
 public class StringFilenameValidationUnitTest {
 
     private static final String CORRECT_FILENAME_PATTERN = "baeldung.txt";
+    private static final String FILENAME_WITH_COLON = "bael:dung.txt";
+    private static final String FILENAME_WITH_FORWARD_SLASH = "bael/dung.txt";
+    private static final String FILENAME_WITH_BACKWARD_SLASH = "bael\\dung.txt";
 
     @ParameterizedTest
     @MethodSource("correctAlphanumericFilenamesProvider")
@@ -92,6 +95,26 @@ public void givenFilenameStringWithInvalidWindowsCharAndIsWindows_whenValidateUs
 		assertThat(validateStringFilenameUsingContains(filename)).isFalse();
 	}
 
+    @Test
+    @EnabledOnOs(OS.WINDOWS)
+	public void givenFilenameStringWithInvalidColonWindowsCharAndIsWindows_thenNIO2FailsIOSucceed()
+			throws IOException {
+		assertThat(validateStringFilenameUsingIO(FILENAME_WITH_COLON)).isTrue();
+		assertThatThrownBy(() -> validateStringFilenameUsingNIO2(FILENAME_WITH_COLON))
+				.isInstanceOf(InvalidPathException.class).hasMessageContaining("Illegal char");
+	}
+    
+    @Test
+    @EnabledOnOs(OS.WINDOWS)
+	public void givenFilenameStringWithInvalidSlashWindowsCharAndIsWindows_thenIOFailsNIO2Succeed() {
+		assertThatThrownBy(() -> validateStringFilenameUsingIO(FILENAME_WITH_FORWARD_SLASH))
+				.isInstanceOf(IOException.class).hasMessageContaining("The system cannot find the path specified");
+		assertThatThrownBy(() -> validateStringFilenameUsingIO(FILENAME_WITH_BACKWARD_SLASH))
+				.isInstanceOf(IOException.class).hasMessageContaining("The system cannot find the path specified");
+		assertThat(validateStringFilenameUsingNIO2(FILENAME_WITH_FORWARD_SLASH)).isTrue();
+		assertThat(validateStringFilenameUsingNIO2(FILENAME_WITH_BACKWARD_SLASH)).isTrue();
+	}
+    
     @ParameterizedTest
     @EnabledOnOs({OS.LINUX, OS.MAC})
     @MethodSource("filenamesWithInvalidUnixChars")