1 files changed, 81 insertions, 0 deletions
diff --git a/android/WALT/app/src/test/java/org/chromium/latency/walt/HistogramChartTest.java b/android/WALT/app/src/test/java/org/chromium/latency/walt/HistogramChartTest.java
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@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package org.chromium.latency.walt;
+
+import com.github.mikephil.charting.data.BarData;
+import com.github.mikephil.charting.data.BarDataSet;
+import com.github.mikephil.charting.data.BarEntry;
+import com.github.mikephil.charting.interfaces.datasets.IBarDataSet;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import java.util.ArrayList;
+
+import static junit.framework.Assert.assertEquals;
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Mockito.when;
+import static org.powermock.api.mockito.PowerMockito.mockStatic;
+
+@RunWith(PowerMockRunner.class)
+@PrepareForTest(android.graphics.Color.class)
+public class HistogramChartTest {
+
+    private BarData barData;
+    private HistogramChart.HistogramData data;
+
+    @Before
+    public void setUp() {
+        mockStatic(android.graphics.Color.class);
+        when(android.graphics.Color.rgb(anyInt(), anyInt(), anyInt())).thenReturn(0);
+        barData = new BarData();
+        barData.setBarWidth((1f - HistogramChart.GROUP_SPACE)/1);
+        barData.addDataSet(new BarDataSet(new ArrayList<BarEntry>(), "SomeLabel"));
+        data = new HistogramChart.HistogramData(1, 5f);
+        data.addEntry(barData, 0, 12);
+        data.addEntry(barData, 0, 14);
+        data.addEntry(barData, 0, 16);
+        data.addEntry(barData, 0, 21);
+    }
+
+    @Test
+    public void testBinHeights() {
+        final IBarDataSet barDataSet = barData.getDataSetByIndex(0);
+        assertEquals(3, barDataSet.getEntryCount());
+        assertEquals(2d, barDataSet.getEntryForIndex(0).getY(), 0.000001);
+        assertEquals(1d, barDataSet.getEntryForIndex(1).getY(), 0.000001);
+        assertEquals(1d, barDataSet.getEntryForIndex(2).getY(), 0.000001);
+    }
+
+    @Test
+    public void testBinXPositions() {
+        final IBarDataSet barDataSet = barData.getDataSetByIndex(0);
+        assertEquals(3, barDataSet.getEntryCount());
+        assertEquals(0d + 0.05d + 0.45d, barDataSet.getEntryForIndex(0).getX(), 0.000001);
+        assertEquals(1d + 0.05d + 0.45d, barDataSet.getEntryForIndex(1).getX(), 0.000001);
+        assertEquals(2d + 0.05d + 0.45d, barDataSet.getEntryForIndex(2).getX(), 0.000001);
+    }
+
+    @Test
+    public void testDisplayValue() {
+        assertEquals(10d, data.getMinBin(), 0.000001);
+        assertEquals(15d, data.getDisplayValue(1), 0.000001);
+    }
+}