added test for computeSeries

Author: bleibdirtroy

src/test/java/io/jenkins/plugins/forensics/miner/RelativeCountCommitStatisticsSeriesBuilderTest.java

@@ -1,8 +1,10 @@
 package io.jenkins.plugins.forensics.miner;
 
+import java.util.Map;
+
 import org.junit.jupiter.api.Test;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.assertj.core.api.Assertions.*;
 import static org.mockito.Mockito.*;
 
 class RelativeCountCommitStatisticsSeriesBuilderTest {
@@ -11,9 +13,17 @@ class RelativeCountCommitStatisticsSeriesBuilderTest {
     void computeSeries() {
         RelativeCountCommitStatisticsSeriesBuilder relativeCountCommitStatisticsSeriesBuilder = new RelativeCountCommitStatisticsSeriesBuilder();
         CommitStatisticsBuildAction commitStatisticsBuildActionStub = mock(CommitStatisticsBuildAction.class);
-        when(commitStatisticsBuildActionStub.getCommitStatistics()).thenReturn(new CommitStatistics());
+        CommitStatistics commitStatistics = mock(CommitStatistics.class);
+        when(commitStatisticsBuildActionStub.getCommitStatistics()).thenReturn(commitStatistics);
+        when(commitStatistics.getCommitCount()).thenReturn(7);
+        when(commitStatistics.getAuthorCount()).thenReturn(11);
+        when(commitStatistics.getFilesCount()).thenReturn(17);
 
-        relativeCountCommitStatisticsSeriesBuilder.computeSeries(commitStatisticsBuildActionStub);
+        Map<String, Integer> result = relativeCountCommitStatisticsSeriesBuilder.computeSeries(
+                commitStatisticsBuildActionStub);
 
+        assertThat(result.get("commits")).isEqualTo(7);
+        assertThat(result.get("authors")).isEqualTo(11);
+        assertThat(result.get("files")).isEqualTo(17);
     }
 }