[BAEL-16643] Split guava module

guava-io/src/main/test/java/com/baeldung/guava/GuavaCountingOutputStreamUnitTest.java

@@ -0,0 +1,29 @@
+package org.baeldung.guava;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+
+import org.junit.Test;
+
+import com.google.common.io.CountingOutputStream;
+
+public class GuavaCountingOutputStreamUnitTest {
+    public static final int MAX = 5;
+
+    @Test(expected = RuntimeException.class)
+    public void givenData_whenCountReachesLimit_thenThrowException() throws Exception {
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        CountingOutputStream cos = new CountingOutputStream(out);
+
+        byte[] data = new byte[1024];
+        ByteArrayInputStream in = new ByteArrayInputStream(data);
+
+        int b;
+        while ((b = in.read()) != -1) {
+            cos.write(b);
+            if (cos.getCount() >= MAX) {
+                throw new RuntimeException("Write limit reached");
+            }
+        }
+    }
+}