X-Git-Url: http://source.jalview.org/gitweb/?p=jalview.git;a=blobdiff_plain;f=test%2Fjalview%2Fdatamodel%2FSequenceTest.java;h=6d071130c23182cb703dcbad0734ee6ed6b3074b;hp=e5499782936984f05bfa46f969969411842dc03d;hb=0bf5983f8a17fdfecb2cac649e3650763a8973ce;hpb=6acb76009af1034a8510b7b8aa359816301db601

diff --git a/test/jalview/datamodel/SequenceTest.java b/test/jalview/datamodel/SequenceTest.java
index e549978..6d07113 100644
--- a/test/jalview/datamodel/SequenceTest.java
+++ b/test/jalview/datamodel/SequenceTest.java
@@ -110,6 +110,23 @@ public class SequenceTest
     assertTrue(sq.isProtein());
   }
 
+  @Test(groups = ("Functional"))
+  public void testIsProteinWithXorNAmbiguityCodes()
+  {
+    // test Protein with N - poly asparagine 
+    assertTrue(new Sequence("prot", "ASDFASDFASDFNNNNNNNNN").isProtein());
+    assertTrue(new Sequence("prot", "NNNNNNNNNNNNNNNNNNNNN").isProtein());
+    // test Protein with X
+    assertTrue(new Sequence("prot", "ASDFASDFASDFXXXXXXXXX").isProtein());
+    // test DNA with X
+    assertFalse(new Sequence("prot", "ACGTACGTACGTXXXXXXXX").isProtein());
+    // test DNA with N
+    assertFalse(new Sequence("prot", "ACGTACGTACGTNNNNNNNN").isProtein());
+    // test RNA with X
+    assertFalse(new Sequence("prot", "ACGUACGUACGUXXXXXXXXX").isProtein());
+    assertFalse(new Sequence("prot", "ACGUACGUACGUNNNNNNNNN").isProtein());
+  }
+
   @Test(groups = { "Functional" })
   public void testGetAnnotation()
   {