X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=test%2Fjalview%2Fmath%2FMatrixTest.java;h=97ded5a345ff65da86ef602242995feb85a4169d;hb=94ed46d6216e3b3fd195144660815396e6c42683;hp=bd4108c231511eff1953656e0a5a853aafb99537;hpb=a581eb571426fb19c6b3421eebaedd90c63bb630;p=jalview.git

diff --git a/test/jalview/math/MatrixTest.java b/test/jalview/math/MatrixTest.java
index bd4108c..97ded5a 100644
--- a/test/jalview/math/MatrixTest.java
+++ b/test/jalview/math/MatrixTest.java
@@ -1,6 +1,7 @@
 package jalview.math;
 
 import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertNotSame;
 import static org.testng.Assert.assertNull;
 import static org.testng.Assert.assertTrue;
 import static org.testng.Assert.fail;
@@ -188,6 +189,7 @@ public class MatrixTest
     }
     Matrix m1 = new Matrix(in);
     Matrix m2 = (Matrix) m1.copy();
+    assertNotSame(m1, m2);
     assertTrue(matrixEquals(m1, m2));
   }
 
@@ -514,4 +516,19 @@ public class MatrixTest
     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
+  }
 }