X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=test%2Fjalview%2Fdatamodel%2FSequenceTest.java;fp=test%2Fjalview%2Fdatamodel%2FSequenceTest.java;h=1dab2e7ecc01f2128f066c321bf385a4a4a6432a;hb=b863743db0b14cccc4a5ebe46cfe66954500dcef;hp=4ac8c5bc1f3f387efd4ab502e69129ae0ab770de;hpb=6875edc608179e9710388439099542296f263c15;p=jalview.git

diff --git a/test/jalview/datamodel/SequenceTest.java b/test/jalview/datamodel/SequenceTest.java
index 4ac8c5b..1dab2e7 100644
--- a/test/jalview/datamodel/SequenceTest.java
+++ b/test/jalview/datamodel/SequenceTest.java
@@ -109,6 +109,23 @@ 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()
   {