Add test for RelativeCountTrendChartTest

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

@@ -0,0 +1,78 @@
+package io.jenkins.plugins.forensics.miner;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+
+import edu.hm.hafner.echarts.Build;
+import edu.hm.hafner.echarts.BuildResult;
+import edu.hm.hafner.echarts.ChartModelConfiguration;
+import edu.hm.hafner.echarts.LinesChartModel;
+import edu.hm.hafner.echarts.SeriesBuilder;
+
+import static org.assertj.core.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+/**
+ * Tests the class {@link RelativeCountTrendChart}.
+ *
+ * @author Nikolas Paripovic
+ */
+class RelativeCountTrendChartTest {
+
+    @Test
+    void shouldCreate() {
+        Iterable<BuildResult<CommitStatisticsBuildAction>> buildResult = new ArrayList<>();
+        ChartModelConfiguration chartModelConfiguration = createChartModelConfiguration();
+        SeriesBuilder<CommitStatisticsBuildAction> seriesBuilder = createSeriesBuilder();
+
+        RelativeCountTrendChart relativeCountTrendChart = new RelativeCountTrendChart();
+        LinesChartModel linesChartModel = relativeCountTrendChart.create(buildResult, chartModelConfiguration, seriesBuilder);
+
+        assertThat(linesChartModel.getSeries()).isEmpty();
+    }
+
+    @Test
+    void shouldCreateWithData() {
+        Iterable<BuildResult<CommitStatisticsBuildAction>> buildResult = createBuildResultsWithData();
+        ChartModelConfiguration chartModelConfiguration = createChartModelConfiguration();
+        SeriesBuilder<CommitStatisticsBuildAction> seriesBuilder = createSeriesBuilder();
+
+        RelativeCountTrendChart relativeCountTrendChart = new RelativeCountTrendChart();
+        LinesChartModel linesChartModel = relativeCountTrendChart.create(buildResult, chartModelConfiguration, seriesBuilder);
+
+        assertThat(linesChartModel.getSeries()).hasSize(3);
+        assertThat(linesChartModel.getSeries()).allSatisfy(series -> assertThat(series.getData()).hasSize(4));
+    }
+
+    private Iterable<BuildResult<CommitStatisticsBuildAction>> createBuildResultsWithData() {
+        List<BuildResult<CommitStatisticsBuildAction>> buildResults = new ArrayList<>();
+        buildResults.add(createResult(1, 2, 3));
+        buildResults.add(createResult(4, 5, 6));
+        buildResults.add(createResult(7, 8, 9));
+        buildResults.add(createResult(10, 11, 12));
+        return buildResults;
+    }
+
+    private ChartModelConfiguration createChartModelConfiguration() {
+        return new ChartModelConfiguration();
+    }
+
+    private SeriesBuilder<CommitStatisticsBuildAction> createSeriesBuilder() {
+        return new RelativeCountCommitStatisticsSeriesBuilder();
+    }
+
+    private BuildResult<CommitStatisticsBuildAction> createResult(final int buildNumber, final int added, final int deleted) {
+        CommitStatisticsBuildAction action = mock(CommitStatisticsBuildAction.class);
+        CommitStatistics commitStatistics = mock(CommitStatistics.class);
+        when(commitStatistics.getAddedLines()).thenReturn(added);
+        when(commitStatistics.getDeletedLines()).thenReturn(deleted);
+
+        when(action.getCommitStatistics()).thenReturn(commitStatistics);
+
+        Build build = new Build(buildNumber);
+        return new BuildResult<>(build, action);
+    }
+
+}