Add a unit test for AddedVersusDeletedLinesCommitStatisticsSeriesBuilder

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

@@ -0,0 +1,31 @@
+package io.jenkins.plugins.forensics.miner;
+
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+import static io.jenkins.plugins.forensics.miner.AddedVersusDeletedLinesForensicsSeriesBuilder.*;
+import static org.assertj.core.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+class AddedVersusDeletedLinesCommitStatisticsSeriesBuilderTest {
+    @Test
+    void shouldComputeSeries() {
+        AddedVersusDeletedLinesCommitStatisticsSeriesBuilder builder = new AddedVersusDeletedLinesCommitStatisticsSeriesBuilder();
+        CommitStatisticsBuildAction actionStub = createCommitStatisticsBuildActionStub(10, 20);
+
+        Map<String, Integer> series = builder.computeSeries(actionStub);
+        assertThat(series)
+                .containsEntry(ADDED, 10)
+                .containsEntry(DELETED, 20);
+    }
+
+    private CommitStatisticsBuildAction createCommitStatisticsBuildActionStub(int addedLines, int deletedLines) {
+        CommitStatisticsBuildAction actionStub = mock(CommitStatisticsBuildAction.class);
+        CommitStatistics commitStatisticsStub = mock(CommitStatistics.class);
+        when(actionStub.getCommitStatistics()).thenReturn(commitStatisticsStub);
+        when(commitStatisticsStub.getAddedLines()).thenReturn(addedLines);
+        when(commitStatisticsStub.getDeletedLines()).thenReturn(deletedLines);
+        return actionStub;
+    }
+}