1 files changed, 60 insertions, 0 deletions
diff --git a/dmaap-bc/src/test/java/org/onap/dmaap/dbcapi/util/RandomStringTest.java b/dmaap-bc/src/test/java/org/onap/dmaap/dbcapi/util/RandomStringTest.java
new file mode 100644
index 0000000..e549dc3
--- /dev/null
+++ b/dmaap-bc/src/test/java/org/onap/dmaap/dbcapi/util/RandomStringTest.java
@@ -0,0 +1,60 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * org.onap.dmaap
+ * ================================================================================
+ * Copyright (C) 2019 Nokia Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.dmaap.dbcapi.util;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class RandomStringTest {
+
+    private static final int LENGTH = 10;
+    @Rule
+    public ExpectedException thrown = ExpectedException.none();
+    private RandomString randomString = new RandomString(LENGTH);
+
+    @Test
+    public void nextString_shouldReturnStringWithGivenLength() {
+
+        String nextString = randomString.nextString();
+
+        assertEquals(LENGTH, nextString.length());
+    }
+
+    @Test
+    public void nextString_shouldReturnAlphanumeric() {
+
+        String nextString = randomString.nextString();
+
+        assertTrue(nextString.matches("[a-z0-9]*"));
+    }
+
+    @Test
+    public void constructor_shouldThrowExceptionForNegativeLength() {
+
+        thrown.expect(IllegalArgumentException.class);
+
+        new RandomString(-1);
+    }
+}
+\ No newline at end of file