Merge branch 'develop' into features/JAL-2316

[jalview.git] / test / jalview / datamodel / SequenceGroupTest.java

diff --git a/test/jalview/datamodel/SequenceGroupTest.java b/test/jalview/datamodel/SequenceGroupTest.java
index 53ac181..243bd53 100644 (file)
--- a/test/jalview/datamodel/SequenceGroupTest.java
+++ b/test/jalview/datamodel/SequenceGroupTest.java
@@ -6,6 +6,7 @@ import static org.testng.Assert.assertNotNull;
 import static org.testng.Assert.assertNull;
 import static org.testng.Assert.assertSame;
 import static org.testng.Assert.assertTrue;
+import static org.testng.Assert.fail;
 
 import jalview.schemes.NucleotideColourScheme;
 
@@ -79,4 +80,36 @@ public class SequenceGroupTest
     sg.setColourScheme(scheme);
     assertSame(scheme, sg.getColourScheme());
   }
+
+  @Test
+  public void testSetContext()
+  {
+    SequenceGroup sg1 = new SequenceGroup();
+    SequenceGroup sg2 = new SequenceGroup();
+    SequenceGroup sg3 = new SequenceGroup();
+    assertNull(sg1.getContext());
+    sg1.setContext(null);
+    assertNull(sg1.getContext());
+    try
+    {
+      sg1.setContext(sg1); // self-reference :-O
+      fail("Expected exception");
+    } catch (IllegalArgumentException e)
+    {
+      // expected
+      assertNull(sg1.getContext());
+    }
+    sg1.setContext(sg2);
+    assertSame(sg2, sg1.getContext());
+    sg2.setContext(sg3);
+    try
+    {
+      sg3.setContext(sg1); // circular reference :-O
+      fail("Expected exception");
+    } catch (IllegalArgumentException e)
+    {
+      // expected
+      assertNull(sg3.getContext());
+    }
+  }
 }