Improve code quality

[aai/sparky-be.git] / sparkybe-onap-service / src / test / java / org / onap / aai / sparky / util / ErrorUtilTest.java

diff --git a/sparkybe-onap-service/src/test/java/org/onap/aai/sparky/util/ErrorUtilTest.java b/sparkybe-onap-service/src/test/java/org/onap/aai/sparky/util/ErrorUtilTest.java
new file mode 100644 (file)
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+++ b/sparkybe-onap-service/src/test/java/org/onap/aai/sparky/util/ErrorUtilTest.java
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+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 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.aai.sparky.util;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
+@RunWith(MockitoJUnitRunner.class)
+public class ErrorUtilTest {
+
+    private StackTraceElement[] stackTraceElements = new StackTraceElement[]{
+            new StackTraceElement("TestClass", "methodA", "a", 2),
+            new StackTraceElement("TestClass", "methodB", "b", 3)
+    };
+
+    @Mock
+    Exception exception;
+
+    @Test
+    public void shouldReturnEmptyStringWhenStackTraceArrayIsEmpty() {
+        assertEquals("", ErrorUtil.extractStackTraceElements(1, exception));
+    }
+
+    @Test
+    public void shouldReturnNarrowedStackTraceElementsAsFormattedStringToPassedMaxNumberOfElements() {
+        // given
+        when(exception.getStackTrace()).thenReturn(stackTraceElements);
+        // when
+        final String actual = ErrorUtil.extractStackTraceElements(1, exception);
+        // then
+        assertEquals("TestClass.methodA(a:2)\n", actual);
+    }
+
+    @Test
+    public void shouldReturnFullStackTraceElementsAsFormattedStringWhenMaxNumberOfElementsIsOutOfRange() {
+        // given
+        when(exception.getStackTrace()).thenReturn(stackTraceElements);
+        // when
+        final String actual = ErrorUtil.extractStackTraceElements(5, exception);
+        // then
+        assertEquals("TestClass.methodA(a:2)\nTestClass.methodB(b:3)\n", actual);
+    }
+
+}