Fix test fixtures

Author: garydgregory

src/test/java/org/apache/commons/io/FileUtilsTest.java

@@ -2815,9 +2815,9 @@ public void testReadFileToString_IOExceptionOnPosixFileSystem() throws Exception
     @Test
     public void testReadFileToStringWithDefaultEncoding() throws Exception {
         final File file = new File(tempDirFile, "read.obj");
-        final String fixture = "Hello \u1234";
+        // Don't use non-ASCII in this test fixture because this test uses the default platform encoding.
+        final String fixture = "Hello 1234";
         Files.write(file.toPath(), fixture.getBytes());
-
         assertEquals(fixture, FileUtils.readFileToString(file));
     }
 
@@ -3506,7 +3506,7 @@ public void testWriteStringToFileIntoSymlinkedDir() throws Exception {
         final Path symlinkDir = createTempSymbolicLinkedRelativeDir().getLeft();
         final File file = symlinkDir.resolve("file").toFile();
         FileUtils.writeStringToFile(file, "Hello \u1234", StandardCharsets.UTF_8);
-        final byte[] text = "Hello \u1234".getBytes();
+        final byte[] text = "Hello \u1234".getBytes(StandardCharsets.UTF_8);
         TestUtils.assertEqualContent(text, file);
     }
 

src/test/java/org/apache/commons/io/IOUtilsTest.java

@@ -1085,7 +1085,8 @@ public void testReadLines_Reader() throws Exception {
         final File file = TestUtils.newFile(temporaryFolder, "lines.txt");
         Reader in = null;
         try {
-            final String[] data = {"hello", "\u1234", "", "this is", "some text"};
+            // Don't use non-ASCII in this test fixture because this test uses the default platform encoding.
+            final String[] data = {"hello", "1234", "", "this is", "some text"};
             TestUtils.createLineFileUtf8(file, data);
             in = new InputStreamReader(Files.newInputStream(file.toPath()));
             final List<String> lines = IOUtils.readLines(in);