Fix ByteArrayInputStream.read. Fix https://github.com/konsoletyper/teavm/issues/213

classlib/src/main/java/org/teavm/classlib/java/io/TByteArrayInputStream.java

@@ -40,7 +40,7 @@ public class TByteArrayInputStream extends TInputStream {
 
     @Override
     public int read() {
-        return pos < count ? buf[pos++] : -1;
+        return pos < count ? buf[pos++] & 0xFF : -1;
     }
 
     @Override

tests/src/test/java/org/teavm/classlib/java/io/ByteArrayInputStreamTest.java

@@ -0,0 +1,38 @@
+/*
+ *  Copyright 2016 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.java.io;
+
+import static org.junit.Assert.assertEquals;
+import java.io.ByteArrayInputStream;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.teavm.junit.TeaVMTestRunner;
+
+@RunWith(TeaVMTestRunner.class)
+public class ByteArrayInputStreamTest {
+    @Test
+    public void readsSingleByte() {
+        ByteArrayInputStream input = new ByteArrayInputStream(new byte[] { 0, 1, -1, 127, -128, 23, -23 });
+        assertEquals(0, input.read());
+        assertEquals(1, input.read());
+        assertEquals(255, input.read());
+        assertEquals(127, input.read());
+        assertEquals(128, input.read());
+        assertEquals(23, input.read());
+        assertEquals(233, input.read());
+        assertEquals(-1, input.read());
+    }
+}