Add tests.

Author: Gary Gregory

src/test/java/org/apache/commons/io/input/BoundedReaderTest.java

@@ -22,18 +22,28 @@
 import static org.junit.Assert.assertTrue;
 
 import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
 import java.io.IOException;
+import java.io.LineNumberReader;
 import java.io.Reader;
 import java.io.StringReader;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.concurrent.atomic.AtomicBoolean;
 
+import org.apache.commons.io.FileUtils;
 import org.junit.Test;
 
-public class BoundedReaderTest
-{
-    private final Reader sr = new BufferedReader( new StringReader( "01234567890" ) );
+public class BoundedReaderTest {
+    private static final String STRING_END_NO_EOL = "0\n1\n2";
 
-    private final Reader shortReader = new BufferedReader( new StringReader( "01" ) );
+    private static final String STRING_END_EOL = "0\n1\n2\n";
+
+    private final Reader sr = new BufferedReader(new StringReader("01234567890"));
+
+    private final Reader shortReader = new BufferedReader(new StringReader("01"));
 
     @Test
     public void readTillEnd() throws IOException {
@@ -101,7 +111,6 @@ public void markReset() throws IOException {
         }
     }
 
-
     @Test
     public void markResetWithMarkOutsideBoundedReaderMax() throws IOException {
         try (final BoundedReader mr = new BoundedReader(sr, 3)) {
@@ -181,12 +190,54 @@ public void close() throws IOException {
         assertTrue(closed.get());
     }
 
+    private void testLineNumberReader(final Reader source) throws IOException {
+        try (LineNumberReader reader = new LineNumberReader(new BoundedReader(source, 10_000_000))) {
+            while (reader.readLine() != null) {
+                // noop
+            }
+        }
+    }
+
+    @Test(timeout = 5000)
+    public void testLineNumberReaderAndStringReaderLastLineEolNo() throws IOException {
+        testLineNumberReader(new StringReader(STRING_END_NO_EOL));
+    }
+
+    @Test(timeout = 5000)
+    public void testLineNumberReaderAndStringReaderLastLineEolYes() throws IOException {
+        testLineNumberReader(new StringReader(STRING_END_EOL));
+    }
+
+    @Test(timeout = 5000)
+    public void testLineNumberReaderAndFileReaderLastLineEolNo() throws IOException {
+        testLineNumberReaderAndFileReaderLastLine(STRING_END_NO_EOL);
+    }
+
+    @Test(timeout = 5000)
+    public void testLineNumberReaderAndFileReaderLastLineEolYes() throws IOException {
+        testLineNumberReaderAndFileReaderLastLine(STRING_END_EOL);
+    }
+
+    public void testLineNumberReaderAndFileReaderLastLine(final String data) throws IOException {
+        final Path path = Files.createTempFile(getClass().getSimpleName(), ".txt");
+        try {
+            final File file = path.toFile();
+            FileUtils.write(file, data, StandardCharsets.ISO_8859_1);
+            try (FileReader source = new FileReader(file)) {
+                testLineNumberReader(source);
+            }
+        } finally {
+            Files.delete(path);
+        }
+    }
+
     @Test(timeout = 5000)
     public void testReadBytesEOF() throws IOException {
-        final BoundedReader mr = new BoundedReader( sr, 3 );
-        try ( BufferedReader br = new BufferedReader( mr ) ) {
+        final BoundedReader mr = new BoundedReader(sr, 3);
+        try (BufferedReader br = new BufferedReader(mr)) {
             br.readLine();
             br.readLine();
         }
     }
+
 }