Add tests for ball logic in image resolver page

.vscode/settings.json

@@ -1,3 +1,4 @@
 {
-    "java.configuration.updateBuildConfiguration": "automatic"
+    "java.configuration.updateBuildConfiguration": "automatic",
+    "java.debug.settings.onBuildFailureProceed": true
 }

pom.xml

@@ -69,10 +69,12 @@
       <artifactId>ionicons-api</artifactId>
     </dependency>
     <dependency>
-      <groupId>org.mockito</groupId>
-      <artifactId>mockito-core</artifactId>
-      <scope>test</scope>
-    </dependency>
+    <groupId>org.mockito</groupId>
+    <artifactId>mockito-inline</artifactId>
+    <version>2.13.0</version>
+
+    <scope>test</scope>
+</dependency>
   </dependencies>
 
   <dependencyManagement>

src/test/java/org/jenkinsci/plugins/badge/ImageResolverTest.java

@@ -0,0 +1,87 @@
+package org.jenkinsci.plugins.badge;
+
+
+
+import org.junit.ClassRule;
+import hudson.model.BallColor;
+
+import org.junit.Test;
+
+
+import org.jvnet.hudson.test.JenkinsRule;
+
+import org.mockito.Mockito;
+import org.mockito.Spy;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.mockito.Mockito.mock;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.MatcherAssert.*;
+import static org.hamcrest.Matchers.greaterThan;
+import static org.hamcrest.Matchers.lessThan;
+
+import java.io.IOException;
+
+public class ImageResolverTest {
+    @ClassRule
+    public static JenkinsRule jenkinsRule = new JenkinsRule();
+
+    @Test
+    public void TestGetDefault32x32Ball() throws Exception {
+        ImageResolver ImageTester = new ImageResolver();
+        String style="ball-null"; // should give default due to url being null
+        String status = null;
+        String subject = null;
+        String colorName=null;
+        String fileName = "images/32x32/blue.png";
+        BallColor ball = mock(BallColor.class);
+        //default
+        Mockito.when(ball.getImageOf("null")).thenReturn(null);
+        Mockito.when(ball.getImageOf("32x32")).thenReturn(fileName);
+        Mockito.when(ball.noAnime()).thenCallRealMethod();
+        StatusImage TestImage = ImageTester.getImage(ball, style,subject,status, colorName, null, null);
+        assertThat(TestImage.getEtag(), containsString(fileName));
+
+
+    }
+    @Test
+    public void TestGetNonDefaultBall() throws Exception {
+        ImageResolver ImageTester = new ImageResolver();
+        String style="ball-16x16"; // should give url
+        String status = null;
+        String subject = null;
+        String colorName=null;
+        String fileName = "images/16x16/red.png";
+        BallColor ball = mock(BallColor.class);
+        //default
+        Mockito.when(ball.getImageOf("null")).thenReturn(null);
+        Mockito.when(ball.getImageOf("16x16")).thenReturn(fileName);
+        Mockito.when(ball.noAnime()).thenCallRealMethod();
+        StatusImage TestImage = ImageTester.getImage(ball, style,subject,status, colorName, null, null);
+        assertThat(TestImage.getEtag(), containsString(fileName));
+
+
+    }
+    @Test
+    public void testShouldReturnEmpty() throws Exception {
+        ImageResolver ImageTester = new ImageResolver();
+        String style="ball-42x45"; // should throw exception
+        String status = null;
+        String subject = null;
+        String colorName=null;
+        String fileName = "DoesNotExist";;
+        BallColor ball = mock(BallColor.class);
+        //default
+        Mockito.when(ball.getImageOf("null")).thenReturn(null);
+        Mockito.when(ball.getImageOf("42x45")).thenReturn(fileName);
+        Mockito.when(ball.noAnime()).thenCallRealMethod();
+        StatusImage TestImage = ImageTester.getImage(ball, style,subject,status, colorName, null, null);
+        assertThat(TestImage.getEtag(), containsString("empty"));
+
+
+    }
+}
+
+
+