Added tests for DoubleList

core/test/processing/data/DoubleListTest.java

@@ -0,0 +1,87 @@
+package processing.data;
+
+import junit.framework.TestCase;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import static java.lang.Double.NaN;
+import static org.junit.Assert.*;
+
+public class DoubleListTest{
+    @Test
+    public void testDefaultConstructor() {
+        // 10 is the default value in DoubleList
+        DoubleList testedList = new DoubleList();
+        assertEquals(0, testedList.size());
+        assertEquals(10, testedList.data.length);
+    }
+
+    @Test
+    public void testConstructorWithLength() {
+        DoubleList testedList = new DoubleList(20);
+        assertEquals(0, testedList.size());
+        assertEquals(20, testedList.data.length);
+    }
+
+    @Test
+    public void testConstructorWithArray() {
+        double[] source = {1.0, 2.0};
+        DoubleList testedList = new DoubleList(source);
+        assertEquals(2, testedList.size());
+        assertEquals(2, testedList.data.length);
+
+        assertEquals(1, testedList.get(0),0);
+        assertEquals(2, testedList.get(1),0);
+    }
+
+    @Test
+    public void testConstructorWithEmptyArray() {
+        double[] source = {};
+        DoubleList testedList = new DoubleList(source);
+        assertEquals(0, testedList.size());
+        assertEquals(0, testedList.data.length);
+    }
+
+    @Test
+    public void testConstructorWithIterableObject() {
+        List<Object> source = new ArrayList<>(Arrays.asList("1.1", "test", null, 4.5, -1));
+        DoubleList testedList = new DoubleList(source);
+        assertEquals(5, testedList.size());
+
+        double[] expected = {1.1, NaN, NaN, 4.5, -1};
+
+        assertEquals(expected[0], testedList.get(0), 1e-7);
+        assertEquals(expected[1], testedList.get(1), 0);
+        assertTrue(Double.isNaN(testedList.get(1)));
+        assertEquals(expected[2], testedList.get(2), 0);
+        assertTrue(Double.isNaN(testedList.get(2)));
+        assertEquals(expected[3], testedList.get(3), 0);
+        assertEquals(expected[4], testedList.get(4), 0);
+
+        assertArrayEquals(expected, testedList.values(), 1e-7);
+    }
+
+    @Test
+    public void testConstructorWithObject() {
+        String eleStr = "Hello";
+        double eleDouble = 10.0;
+        float eleFloat = 1.2f;
+        Object eleObj = new Object();
+
+        DoubleList testedList = new DoubleList(eleStr, eleDouble, eleFloat, eleObj);
+
+        double[] expected = {NaN, 10.0, 1.2, NaN};
+
+        assertEquals(expected[0], testedList.get(0), 0);
+        assertTrue(Double.isNaN(testedList.get(0)));
+        assertEquals(expected[1], testedList.get(1), 0);
+        assertEquals(expected[2], testedList.get(2), 1e-7);
+        assertEquals(expected[3], testedList.get(3), 0);
+        assertTrue(Double.isNaN(testedList.get(3)));
+
+        assertArrayEquals(expected, testedList.values(),1e-7);
+    }
+}