+ @Test(groups = "Functional")
+ public void testMultiply()
+ {
+ Matrix m = new Matrix(
+ new double[][]
+ { { 2, 3.5, 4 }, { -3.4, 4, 15 } });
+ m.multiply(2d);
+ assertEquals(m.getValue(0, 0), 4d, DELTA);
+ assertEquals(m.getValue(0, 1), 7d, DELTA);
+ assertEquals(m.getValue(0, 2), 8d, DELTA);
+ assertEquals(m.getValue(1, 0), -6.8d, DELTA);
+ assertEquals(m.getValue(1, 1), 8d, DELTA);
+ assertEquals(m.getValue(1, 2), 30d, DELTA);
+ }
+
+ @Test(groups = "Functional")
+ public void testConstructor()
+ {
+ double[][] values = new double[][] { { 1, 2, 3 }, { 4, 5, 6 } };
+ Matrix m = new Matrix(values);
+ assertEquals(m.getValue(0, 0), 1d, DELTA);
+
+ /*
+ * verify the matrix has a copy of the original array
+ */
+ assertNotSame(values[0], m.getRow(0));
+ values[0][0] = -1d;
+ assertEquals(m.getValue(0, 0), 1d, DELTA); // unchanged
+ }
+
+ @Test(groups = "Functional")
+ public void testEquals()
+ {
+ double[][] values = new double[][] { { 1, 2, 3 }, { 4, 5, 6 } };
+ Matrix m1 = new Matrix(values);
+ double[][] values2 = new double[][] { { 1, 2, 3 }, { 4, 5, 6 } };
+ Matrix m2 = new Matrix(values2);
+
+ double delta = 0.0001d;
+ assertTrue(m1.equals(m1, delta));
+ assertTrue(m1.equals(m2, delta));
+ assertTrue(m2.equals(m1, delta));
+
+ double[][] values3 = new double[][] { { 1, 2, 3 }, { 4, 5, 7 } };
+ m2 = new Matrix(values3);
+ assertFalse(m1.equals(m2, delta));
+ assertFalse(m2.equals(m1, delta));
+
+ // must be same shape
+ values2 = new double[][] { { 1, 2, 3 } };
+ m2 = new Matrix(values2);
+ assertFalse(m2.equals(m1, delta));
+
+ assertFalse(m1.equals(null, delta));
+ }