Add tests

Author: garydgregory

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

@@ -133,6 +133,31 @@ public void testReadAfterClose(final int len) throws Exception {
         }
     }
 
+    @ParameterizedTest
+    @MethodSource(AbstractInputStreamTest.ARRAY_LENGTHS_NAME)
+    public void testReadByteArrayAfterClose(final int len) throws Exception {
+        try (MarkTestableInputStream in = new MarkTestableInputStream(new NullInputStream(len, false, false));
+                final MarkShieldInputStream msis = new MarkShieldInputStream(in)) {
+            assertEquals(len, in.available());
+            in.close();
+            assertEquals(0, in.read(new byte[0]));
+            assertThrows(IOException.class, () -> in.read(new byte[2]));
+        }
+    }
+
+    @ParameterizedTest
+    @MethodSource(AbstractInputStreamTest.ARRAY_LENGTHS_NAME)
+    public void testReadByteArrayIntIntAfterClose(final int len) throws Exception {
+        try (MarkTestableInputStream in = new MarkTestableInputStream(new NullInputStream(len, false, false));
+                final MarkShieldInputStream msis = new MarkShieldInputStream(in)) {
+            assertEquals(len, in.available());
+            in.close();
+            assertEquals(0, in.read(new byte[0], 0, 1));
+            assertEquals(0, in.read(new byte[1], 0, 0));
+            assertThrows(IOException.class, () -> in.read(new byte[2], 0, 1));
+        }
+    }
+
     @Test
     public void testResetThrowsExceptionWhenUnderlyingDoesNotSupport() throws IOException {
         // test wrapping an underlying stream which does NOT support marking

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

@@ -245,7 +245,7 @@ public void testReadByteArrayAfterClose() throws Exception {
     }
 
     @Test
-    public void testReadByteArrayIndexAfterClose() throws Exception {
+    public void testReadByteArrayIntIntAfterClose() throws Exception {
         try (InputStream in = new NullInputStream()) {
             assertEquals(0, in.available());
             in.close();