Add AutoCloseInputStream tests

Author: garydgregory

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

@@ -40,6 +40,7 @@ public class AutoCloseInputStreamTest {
 
     private boolean closed;
 
+    @SuppressWarnings("deprecation")
     @BeforeEach
     public void setUp() {
         data = new byte[] { 'x', 'y', 'z' };
@@ -52,6 +53,16 @@ public void close() {
         closed = false;
     }
 
+    @Test
+    public void testAvailableAfterClose() throws IOException {
+        final InputStream shadow;
+        try (InputStream inputStream = new AutoCloseInputStream(new ByteArrayInputStream(data))) {
+            assertEquals(3, inputStream.available());
+            shadow = inputStream;
+        }
+        assertEquals(0, shadow.available());
+    }
+
     @Test
     public void testAvailableAll() throws IOException {
         try (InputStream inputStream = new AutoCloseInputStream(new ByteArrayInputStream(data))) {
@@ -178,4 +189,14 @@ public void testResetBeforeEndSetInputStream() throws IOException {
         }
     }
 
+    @Test
+    public void testrReadAfterClose() throws IOException {
+        final InputStream shadow;
+        try (InputStream inputStream = new AutoCloseInputStream(new ByteArrayInputStream(data))) {
+            assertEquals(3, inputStream.available());
+            shadow = inputStream;
+        }
+        assertEquals(IOUtils.EOF, shadow.read());
+    }
+
 }