Fixed all issues in boundary stream

test/zutil/io/IOUtilTest.java

@@ -0,0 +1,31 @@
+package zutil.io;
+
+import org.junit.Test;
+
+import java.io.IOException;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Created by Ziver on 2016-07-12.
+ */
+public class IOUtilTest {
+
+    @Test
+    public void readLine() throws IOException {
+        StringInputStream in = new StringInputStream("test\ntest2\ntest3");
+
+        assertEquals("test", IOUtil.readLine(in));
+        assertEquals("test2", IOUtil.readLine(in));
+        assertEquals("test3", IOUtil.readLine(in));
+        assertEquals(null, IOUtil.readLine(in));
+    }
+    @Test
+    public void readLineCarriageReturn() throws IOException {
+        StringInputStream in = new StringInputStream("test\r\ntest2\r\n");
+
+        assertEquals("test", IOUtil.readLine(in));
+        assertEquals("test2", IOUtil.readLine(in));
+        assertEquals(null, IOUtil.readLine(in));
+    }
+}