JAL-2557 removal of Sequence.sequenceFeatures
[jalview.git] / test / jalview / io / FeaturesFileTest.java
index 73d8826..45340d9 100644 (file)
@@ -23,29 +23,41 @@ package jalview.io;
 import static org.testng.AssertJUnit.assertEquals;
 import static org.testng.AssertJUnit.assertFalse;
 import static org.testng.AssertJUnit.assertNotNull;
-import static org.testng.AssertJUnit.assertNull;
 import static org.testng.AssertJUnit.assertTrue;
 
+import jalview.api.FeatureColourI;
 import jalview.api.FeatureRenderer;
 import jalview.datamodel.Alignment;
 import jalview.datamodel.AlignmentI;
 import jalview.datamodel.SequenceDummy;
 import jalview.datamodel.SequenceFeature;
 import jalview.datamodel.SequenceI;
+import jalview.datamodel.features.SequenceFeatures;
 import jalview.gui.AlignFrame;
-import jalview.schemes.AnnotationColourGradient;
-import jalview.schemes.GraduatedColor;
+import jalview.gui.JvOptionPane;
 
 import java.awt.Color;
 import java.io.File;
 import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
+import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
 public class FeaturesFileTest
 {
 
+  @BeforeClass(alwaysRun = true)
+  public void setUpJvOptionPane()
+  {
+    JvOptionPane.setInteractiveMode(false);
+    JvOptionPane.setMockResponse(JvOptionPane.CANCEL_OPTION);
+  }
+
   private static String simpleGffFile = "examples/testdata/simpleGff3.gff";
 
   @Test(groups = { "Functional" })
@@ -54,10 +66,10 @@ public class FeaturesFileTest
     File f = new File("examples/uniref50.fa");
     AlignmentI al = readAlignmentFile(f);
     AlignFrame af = new AlignFrame(al, 500, 500);
-    Map<String, Object> colours = af.getFeatureRenderer()
+    Map<String, FeatureColourI> colours = af.getFeatureRenderer()
             .getFeatureColours();
     FeaturesFile featuresFile = new FeaturesFile(
-            "examples/exampleFeatures.txt", FormatAdapter.FILE);
+            "examples/exampleFeatures.txt", DataSourceType.FILE);
     assertTrue("Test " + "Features file test"
             + "\nFailed to parse features file.",
             featuresFile.parse(al.getDataset(), colours, true));
@@ -68,61 +80,82 @@ public class FeaturesFileTest
      */
     colours = af.getFeatureRenderer().getFeatureColours();
     assertEquals("26 feature group colours not found", 26, colours.size());
-    assertEquals(colours.get("Cath"), new Color(0x93b1d1));
-    assertEquals(colours.get("ASX-MOTIF"), new Color(0x6addbb));
+    assertEquals(colours.get("Cath").getColour(), new Color(0x93b1d1));
+    assertEquals(colours.get("ASX-MOTIF").getColour(), new Color(0x6addbb));
 
     /*
      * verify (some) features on sequences
      */
-    SequenceFeature[] sfs = al.getSequenceAt(0).getDatasetSequence()
+    List<SequenceFeature> sfs = al.getSequenceAt(0).getDatasetSequence()
             .getSequenceFeatures(); // FER_CAPAA
-    assertEquals(7, sfs.length);
-    SequenceFeature sf = sfs[0];
+    SequenceFeatures.sortFeatures(sfs, true);
+    assertEquals(8, sfs.size());
+
+    /*
+     * verify (in ascending start position order)
+     */
+    SequenceFeature sf = sfs.get(0);
+    assertEquals("Pfam family%LINK%", sf.description);
+    assertEquals(0, sf.begin);
+    assertEquals(0, sf.end);
+    assertEquals("uniprot", sf.featureGroup);
+    assertEquals("Pfam", sf.type);
+    assertEquals(1, sf.links.size());
+    assertEquals("Pfam family|http://pfam.xfam.org/family/PF00111",
+            sf.links.get(0));
+
+    sf = sfs.get(1);
+    assertEquals("Ferredoxin_fold Status: True Positive ", sf.description);
+    assertEquals(3, sf.begin);
+    assertEquals(93, sf.end);
+    assertEquals("uniprot", sf.featureGroup);
+    assertEquals("Cath", sf.type);
+
+    sf = sfs.get(2);
+    assertEquals("Fer2 Status: True Positive Pfam 8_8%LINK%",
+            sf.description);
+    assertEquals("Pfam 8_8|http://pfam.xfam.org/family/PF00111",
+            sf.links.get(0));
+    assertEquals(8, sf.begin);
+    assertEquals(83, sf.end);
+    assertEquals("uniprot", sf.featureGroup);
+    assertEquals("Pfam", sf.type);
+
+    sf = sfs.get(3);
     assertEquals("Iron-sulfur (2Fe-2S)", sf.description);
     assertEquals(39, sf.begin);
     assertEquals(39, sf.end);
     assertEquals("uniprot", sf.featureGroup);
     assertEquals("METAL", sf.type);
-    sf = sfs[1];
+
+    sf = sfs.get(4);
     assertEquals("Iron-sulfur (2Fe-2S)", sf.description);
     assertEquals(44, sf.begin);
     assertEquals(44, sf.end);
     assertEquals("uniprot", sf.featureGroup);
     assertEquals("METAL", sf.type);
-    sf = sfs[2];
+
+    sf = sfs.get(5);
     assertEquals("Iron-sulfur (2Fe-2S)", sf.description);
     assertEquals(47, sf.begin);
     assertEquals(47, sf.end);
     assertEquals("uniprot", sf.featureGroup);
     assertEquals("METAL", sf.type);
-    sf = sfs[3];
+
+    sf = sfs.get(6);
     assertEquals("Iron-sulfur (2Fe-2S)", sf.description);
     assertEquals(77, sf.begin);
     assertEquals(77, sf.end);
     assertEquals("uniprot", sf.featureGroup);
     assertEquals("METAL", sf.type);
-    sf = sfs[4];
-    assertEquals("Fer2 Status: True Positive Pfam 8_8%LINK%",
-            sf.description);
-    assertEquals("Pfam 8_8|http://pfam.xfam.org/family/PF00111",
-            sf.links.get(0).toString());
-    assertEquals(8, sf.begin);
-    assertEquals(83, sf.end);
-    assertEquals("uniprot", sf.featureGroup);
-    assertEquals("Pfam", sf.type);
-    sf = sfs[5];
-    assertEquals("Ferredoxin_fold Status: True Positive ", sf.description);
-    assertEquals(3, sf.begin);
-    assertEquals(93, sf.end);
-    assertEquals("uniprot", sf.featureGroup);
-    assertEquals("Cath", sf.type);
-    sf = sfs[6];
+
+    sf = sfs.get(7);
     assertEquals(
             "High confidence server. Only hits with scores over 0.8 are reported. PHOSPHORYLATION (T) 89_8%LINK%",
             sf.description);
     assertEquals(
             "PHOSPHORYLATION (T) 89_8|http://www.cbs.dtu.dk/cgi-bin/proview/webface-link?seqid=P83527&amp;service=NetPhos-2.0",
-            sf.links.get(0).toString());
+            sf.links.get(0));
     assertEquals(89, sf.begin);
     assertEquals(89, sf.end);
     assertEquals("netphos", sf.featureGroup);
@@ -141,27 +174,28 @@ public class FeaturesFileTest
     File f = new File("examples/uniref50.fa");
     AlignmentI al = readAlignmentFile(f);
     AlignFrame af = new AlignFrame(al, 500, 500);
-    Map<String, Object> colours = af.getFeatureRenderer()
+    Map<String, FeatureColourI> colours = af.getFeatureRenderer()
             .getFeatureColours();
     // GFF2 uses space as name/value separator in column 9
-    String gffData = "METAL\tcc9900\n" + "GFF\n"
+    String gffData = "METAL\tcc9900\n"
+            + "GFF\n"
             + "FER_CAPAA\tuniprot\tMETAL\t44\t45\t4.0\t.\t.\tNote Iron-sulfur; Note 2Fe-2S\n"
             + "FER1_SOLLC\tuniprot\tPfam\t55\t130\t2.0\t.\t.";
     FeaturesFile featuresFile = new FeaturesFile(gffData,
-            FormatAdapter.PASTE);
+            DataSourceType.PASTE);
     assertTrue("Failed to parse features file",
             featuresFile.parse(al.getDataset(), colours, true));
 
     // verify colours read or synthesized
     colours = af.getFeatureRenderer().getFeatureColours();
     assertEquals("1 feature group colours not found", 1, colours.size());
-    assertEquals(colours.get("METAL"), new Color(0xcc9900));
+    assertEquals(colours.get("METAL").getColour(), new Color(0xcc9900));
 
     // verify feature on FER_CAPAA
-    SequenceFeature[] sfs = al.getSequenceAt(0).getDatasetSequence()
+    List<SequenceFeature> sfs = al.getSequenceAt(0).getDatasetSequence()
             .getSequenceFeatures();
-    assertEquals(1, sfs.length);
-    SequenceFeature sf = sfs[0];
+    assertEquals(1, sfs.size());
+    SequenceFeature sf = sfs.get(0);
     assertEquals("Iron-sulfur,2Fe-2S", sf.description);
     assertEquals(44, sf.begin);
     assertEquals(45, sf.end);
@@ -171,8 +205,8 @@ public class FeaturesFileTest
 
     // verify feature on FER1_SOLLC
     sfs = al.getSequenceAt(2).getDatasetSequence().getSequenceFeatures();
-    assertEquals(1, sfs.length);
-    sf = sfs[0];
+    assertEquals(1, sfs.size());
+    sf = sfs.get(0);
     assertEquals("uniprot", sf.description);
     assertEquals(55, sf.begin);
     assertEquals(130, sf.end);
@@ -187,8 +221,8 @@ public class FeaturesFileTest
     String ff = f.getPath();
     FormatAdapter rf = new FormatAdapter();
 
-    AlignmentI al = rf.readFile(ff, FormatAdapter.FILE,
-            new IdentifyFile().identify(ff, FormatAdapter.FILE));
+    AlignmentI al = rf.readFile(ff, DataSourceType.FILE,
+            new IdentifyFile().identify(ff, DataSourceType.FILE));
 
     al.setDataset(null); // creates dataset sequences
     assertNotNull("Couldn't read supplied alignment data.", al);
@@ -196,45 +230,6 @@ public class FeaturesFileTest
   }
 
   /**
-   * Test various ways of describing a feature colour scheme
-   * 
-   * @throws Exception
-   */
-  @Test(groups = { "Functional" })
-  public void testParseGraduatedColourScheme() throws Exception
-  {
-    FeaturesFile ff = new FeaturesFile();
-
-    // colour by label:
-    GraduatedColor gc = ff.parseGraduatedColourScheme(
-            "BETA-TURN-IR\t9a6a94", "label");
-    assertTrue(gc.isColourByLabel());
-    assertEquals(Color.white, gc.getMinColor());
-    assertEquals(Color.black, gc.getMaxColor());
-    assertTrue(gc.isAutoScale());
-
-    // using colour name, rgb, etc:
-    String spec = "blue|255,0,255|absolute|20.0|95.0|below|66.0";
-    gc = ff.parseGraduatedColourScheme("BETA-TURN-IR\t" + spec, spec);
-    assertFalse(gc.isColourByLabel());
-    assertEquals(Color.blue, gc.getMinColor());
-    assertEquals(new Color(255, 0, 255), gc.getMaxColor());
-    assertFalse(gc.isAutoScale());
-    assertFalse(gc.getTolow());
-    assertEquals(20.0f, gc.getMin(), 0.001f);
-    assertEquals(95.0f, gc.getMax(), 0.001f);
-    assertEquals(AnnotationColourGradient.BELOW_THRESHOLD,
-            gc.getThreshType());
-    assertEquals(66.0f, gc.getThresh(), 0.001f);
-
-    // inverse gradient high to low:
-    spec = "blue|255,0,255|95.0|20.0|below|66.0";
-    gc = ff.parseGraduatedColourScheme("BETA-TURN-IR\t" + spec, spec);
-    assertTrue(gc.isAutoScale());
-    assertTrue(gc.getTolow());
-  }
-
-  /**
    * Test parsing a features file with GFF formatted content only
    * 
    * @throws Exception
@@ -245,7 +240,7 @@ public class FeaturesFileTest
     File f = new File("examples/uniref50.fa");
     AlignmentI al = readAlignmentFile(f);
     AlignFrame af = new AlignFrame(al, 500, 500);
-    Map<String, Object> colours = af.getFeatureRenderer()
+    Map<String, FeatureColourI> colours = af.getFeatureRenderer()
             .getFeatureColours();
     // GFF3 uses '=' separator for name/value pairs in colum 9
     String gffData = "##gff-version 3\n"
@@ -253,15 +248,15 @@ public class FeaturesFileTest
             + "Note=Iron-sulfur (2Fe-2S);Note=another note;evidence=ECO:0000255|PROSITE-ProRule:PRU00465\n"
             + "FER1_SOLLC\tuniprot\tPfam\t55\t130\t3.0\t.\t.\tID=$23";
     FeaturesFile featuresFile = new FeaturesFile(gffData,
-            FormatAdapter.PASTE);
+            DataSourceType.PASTE);
     assertTrue("Failed to parse features file",
             featuresFile.parse(al.getDataset(), colours, true));
 
     // verify feature on FER_CAPAA
-    SequenceFeature[] sfs = al.getSequenceAt(0).getDatasetSequence()
+    List<SequenceFeature> sfs = al.getSequenceAt(0).getDatasetSequence()
             .getSequenceFeatures();
-    assertEquals(1, sfs.length);
-    SequenceFeature sf = sfs[0];
+    assertEquals(1, sfs.size());
+    SequenceFeature sf = sfs.get(0);
     // description parsed from Note attribute
     assertEquals("Iron-sulfur (2Fe-2S),another note", sf.description);
     assertEquals(39, sf.begin);
@@ -274,8 +269,8 @@ public class FeaturesFileTest
 
     // verify feature on FER1_SOLLC1
     sfs = al.getSequenceAt(2).getDatasetSequence().getSequenceFeatures();
-    assertEquals(1, sfs.length);
-    sf = sfs[0];
+    assertEquals(1, sfs.size());
+    sf = sfs.get(0);
     // ID used for description if available
     assertEquals("$23", sf.description);
     assertEquals(55, sf.begin);
@@ -297,7 +292,7 @@ public class FeaturesFileTest
     File f = new File("examples/uniref50.fa");
     AlignmentI al = readAlignmentFile(f);
     AlignFrame af = new AlignFrame(al, 500, 500);
-    Map<String, Object> colours = af.getFeatureRenderer()
+    Map<String, FeatureColourI> colours = af.getFeatureRenderer()
             .getFeatureColours();
 
     /*
@@ -306,15 +301,15 @@ public class FeaturesFileTest
     String featureData = "Iron-sulfur (2Fe-2S)\tFER_CAPAA\t-1\t39\t39\tMETAL\n"
             + "Iron-phosphorus (2Fe-P)\tID_NOT_SPECIFIED\t2\t86\t87\tMETALLIC\n";
     FeaturesFile featuresFile = new FeaturesFile(featureData,
-            FormatAdapter.PASTE);
+            DataSourceType.PASTE);
     assertTrue("Failed to parse features file",
             featuresFile.parse(al.getDataset(), colours, true));
 
     // verify FER_CAPAA feature
-    SequenceFeature[] sfs = al.getSequenceAt(0).getDatasetSequence()
+    List<SequenceFeature> sfs = al.getSequenceAt(0).getDatasetSequence()
             .getSequenceFeatures();
-    assertEquals(1, sfs.length);
-    SequenceFeature sf = sfs[0];
+    assertEquals(1, sfs.size());
+    SequenceFeature sf = sfs.get(0);
     assertEquals("Iron-sulfur (2Fe-2S)", sf.description);
     assertEquals(39, sf.begin);
     assertEquals(39, sf.end);
@@ -322,8 +317,8 @@ public class FeaturesFileTest
 
     // verify FER1_SOLLC feature
     sfs = al.getSequenceAt(2).getDatasetSequence().getSequenceFeatures();
-    assertEquals(1, sfs.length);
-    sf = sfs[0];
+    assertEquals(1, sfs.size());
+    sf = sfs.get(0);
     assertEquals("Iron-phosphorus (2Fe-P)", sf.description);
     assertEquals(86, sf.begin);
     assertEquals(87, sf.end);
@@ -334,7 +329,7 @@ public class FeaturesFileTest
   {
     assertEquals("no sequences extracted from GFF3 file", 2,
             dataset.getHeight());
-  
+
     SequenceI seq1 = dataset.findName("seq1");
     SequenceI seq2 = dataset.findName("seq2");
     assertNotNull(seq1);
@@ -353,26 +348,26 @@ public class FeaturesFileTest
     assertFalse("dummy replacement buggy for seq2",
             placeholderseq.equals(seq2.getSequenceAsString()));
     assertNotNull("No features added to seq1", seq1.getSequenceFeatures());
-    assertEquals("Wrong number of features", 3,
-            seq1.getSequenceFeatures().length);
-    assertNull(seq2.getSequenceFeatures());
+    assertEquals("Wrong number of features", 3, seq1.getSequenceFeatures()
+            .size());
+    assertTrue(seq2.getSequenceFeatures().isEmpty());
     assertEquals(
             "Wrong number of features",
             0,
             seq2.getSequenceFeatures() == null ? 0 : seq2
-                    .getSequenceFeatures().length);
+                    .getSequenceFeatures().size());
     assertTrue(
             "Expected at least one CDNA/Protein mapping for seq1",
             dataset.getCodonFrame(seq1) != null
                     && dataset.getCodonFrame(seq1).size() > 0);
-  
+
   }
 
   @Test(groups = { "Functional" })
   public void readGff3File() throws IOException
   {
     FeaturesFile gffreader = new FeaturesFile(true, simpleGffFile,
-            FormatAdapter.FILE);
+            DataSourceType.FILE);
     Alignment dataset = new Alignment(gffreader.getSeqsAsArray());
     gffreader.addProperties(dataset);
     checkDatasetfromSimpleGff3(dataset);
@@ -383,7 +378,7 @@ public class FeaturesFileTest
   {
     AlignmentI dataset = new Alignment(new SequenceI[] {});
     FeaturesFile ffile = new FeaturesFile(simpleGffFile,
-            FormatAdapter.FILE);
+            DataSourceType.FILE);
   
     boolean parseResult = ffile.parse(dataset, null, false, false);
     assertTrue("return result should be true", parseResult);
@@ -394,7 +389,7 @@ public class FeaturesFileTest
   public void simpleGff3FileLoader() throws IOException
   {
     AlignFrame af = new FileLoader(false).LoadFileWaitTillLoaded(
-            simpleGffFile, FormatAdapter.FILE);
+            simpleGffFile, DataSourceType.FILE);
     assertTrue(
             "Didn't read the alignment into an alignframe from Gff3 File",
             af != null);
@@ -406,7 +401,7 @@ public class FeaturesFileTest
   {
     AlignmentI dataset = new Alignment(new SequenceI[] {});
     FeaturesFile ffile = new FeaturesFile(simpleGffFile,
-            FormatAdapter.FILE);
+            DataSourceType.FILE);
   
     boolean parseResult = ffile.parse(dataset, null, false, true);
     assertTrue("return result (relaxedID matching) should be true",
@@ -420,44 +415,73 @@ public class FeaturesFileTest
     File f = new File("examples/uniref50.fa");
     AlignmentI al = readAlignmentFile(f);
     AlignFrame af = new AlignFrame(al, 500, 500);
-    Map<String, Object> colours = af.getFeatureRenderer()
+    Map<String, FeatureColourI> colours = af.getFeatureRenderer()
             .getFeatureColours();
     String features = "METAL\tcc9900\n"
             + "GAMMA-TURN\tred|0,255,255|20.0|95.0|below|66.0\n"
             + "Pfam\tred\n"
             + "STARTGROUP\tuniprot\n"
+            + "Cath\tFER_CAPAA\t-1\t0\t0\tDomain\n" // non-positional feature
             + "Iron\tFER_CAPAA\t-1\t39\t39\tMETAL\n"
             + "Turn\tFER_CAPAA\t-1\t36\t38\tGAMMA-TURN\n"
             + "<html>Pfam domain<a href=\"http://pfam.xfam.org/family/PF00111\">Pfam_3_4</a></html>\tFER_CAPAA\t-1\t20\t20\tPfam\n"
             + "ENDGROUP\tuniprot\n";
     FeaturesFile featuresFile = new FeaturesFile(features,
-            FormatAdapter.PASTE);
+            DataSourceType.PASTE);
     featuresFile.parse(al.getDataset(), colours, false);
 
     /*
-     * first with no features displayed
+     * add positional and non-positional features with null and
+     * empty feature group to check handled correctly
+     */
+    SequenceI seq = al.getSequenceAt(1); // FER_CAPAN
+    seq.addSequenceFeature(new SequenceFeature("Pfam", "desc1", 0, 0, 1.3f,
+            null));
+    seq.addSequenceFeature(new SequenceFeature("Pfam", "desc2", 4, 9,
+            Float.NaN, null));
+    seq = al.getSequenceAt(2); // FER1_SOLLC
+    seq.addSequenceFeature(new SequenceFeature("Pfam", "desc3", 0, 0,
+            Float.NaN, ""));
+    seq.addSequenceFeature(new SequenceFeature("Pfam", "desc4", 5, 8,
+            -2.6f, ""));
+
+    /*
+     * first with no features displayed, exclude non-positional features
      */
     FeatureRenderer fr = af.alignPanel.getFeatureRenderer();
-    Map<String, Object> visible = fr
-            .getDisplayedFeatureCols();
+    Map<String, FeatureColourI> visible = fr.getDisplayedFeatureCols();
+    List<String> visibleGroups = new ArrayList<String>(
+            Arrays.asList(new String[] {}));
     String exported = featuresFile.printJalviewFormat(
-            al.getSequencesArray(), visible);
+            al.getSequencesArray(), visible, visibleGroups, false);
     String expected = "No Features Visible";
     assertEquals(expected, exported);
 
     /*
+     * include non-positional features
+     */
+    visibleGroups.add("uniprot");
+    exported = featuresFile.printJalviewFormat(al.getSequencesArray(),
+            visible, visibleGroups, true);
+    expected = "Cath\tFER_CAPAA\t-1\t0\t0\tDomain\t0.0\n"
+            + "desc1\tFER_CAPAN\t-1\t0\t0\tPfam\t1.3\n"
+            + "desc3\tFER1_SOLLC\t-1\t0\t0\tPfam\n" // NaN is not output
+            + "\nSTARTGROUP\tuniprot\nENDGROUP\tuniprot\n";
+    assertEquals(expected, exported);
+
+    /*
      * set METAL (in uniprot group) and GAMMA-TURN visible, but not Pfam
      */
     fr.setVisible("METAL");
     fr.setVisible("GAMMA-TURN");
     visible = fr.getDisplayedFeatureCols();
     exported = featuresFile.printJalviewFormat(al.getSequencesArray(),
-            visible);
+            visible, visibleGroups, false);
     expected = "METAL\tcc9900\n"
             + "GAMMA-TURN\tff0000|00ffff|20.0|95.0|below|66.0\n"
             + "\nSTARTGROUP\tuniprot\n"
-            + "Iron\tFER_CAPAA\t-1\t39\t39\tMETAL\t0.0\n"
             + "Turn\tFER_CAPAA\t-1\t36\t38\tGAMMA-TURN\t0.0\n"
+            + "Iron\tFER_CAPAA\t-1\t39\t39\tMETAL\t0.0\n"
             + "ENDGROUP\tuniprot\n";
     assertEquals(expected, exported);
 
@@ -467,19 +491,119 @@ public class FeaturesFileTest
     fr.setVisible("Pfam");
     visible = fr.getDisplayedFeatureCols();
     exported = featuresFile.printJalviewFormat(al.getSequencesArray(),
-            visible);
+            visible, visibleGroups, false);
     /*
-     * note the order of feature types is uncontrolled - derives from
-     * FeaturesDisplayed.featuresDisplayed which is a HashSet
+     * features are output within group, ordered by sequence and by type
      */
     expected = "METAL\tcc9900\n"
             + "Pfam\tff0000\n"
             + "GAMMA-TURN\tff0000|00ffff|20.0|95.0|below|66.0\n"
             + "\nSTARTGROUP\tuniprot\n"
-            + "Iron\tFER_CAPAA\t-1\t39\t39\tMETAL\t0.0\n"
             + "Turn\tFER_CAPAA\t-1\t36\t38\tGAMMA-TURN\t0.0\n"
+            + "Iron\tFER_CAPAA\t-1\t39\t39\tMETAL\t0.0\n"
             + "<html>Pfam domain<a href=\"http://pfam.xfam.org/family/PF00111\">Pfam_3_4</a></html>\tFER_CAPAA\t-1\t20\t20\tPfam\t0.0\n"
-            + "ENDGROUP\tuniprot\n";
+            + "ENDGROUP\tuniprot\n"
+            // null / empty group features output after features in named
+            // groups:
+            + "desc2\tFER_CAPAN\t-1\t4\t9\tPfam\n"
+            + "desc4\tFER1_SOLLC\t-1\t5\t8\tPfam\t-2.6\n";
+    assertEquals(expected, exported);
+  }
+
+  @Test(groups = { "Functional" })
+  public void testPrintGffFormat() throws Exception
+  {
+    File f = new File("examples/uniref50.fa");
+    AlignmentI al = readAlignmentFile(f);
+    AlignFrame af = new AlignFrame(al, 500, 500);
+
+    /*
+     * no features
+     */
+    FeaturesFile featuresFile = new FeaturesFile();
+    FeatureRenderer fr = af.alignPanel.getFeatureRenderer();
+    Map<String, FeatureColourI> visible = new HashMap<String, FeatureColourI>();
+    List<String> visibleGroups = new ArrayList<String>(
+            Arrays.asList(new String[] {}));
+    String exported = featuresFile.printGffFormat(al.getSequencesArray(),
+            visible, visibleGroups, false);
+    String gffHeader = "##gff-version 2\n";
+    assertEquals(gffHeader, exported);
+    exported = featuresFile.printGffFormat(al.getSequencesArray(), visible,
+            visibleGroups, true);
+    assertEquals(gffHeader, exported);
+
+    /*
+     * add some features
+     */
+    al.getSequenceAt(0).addSequenceFeature(
+            new SequenceFeature("Domain", "Cath", 0, 0, 0f, "Uniprot"));
+    al.getSequenceAt(0).addSequenceFeature(
+            new SequenceFeature("METAL", "Cath", 39, 39, 1.2f, null));
+    al.getSequenceAt(1)
+            .addSequenceFeature(
+                    new SequenceFeature("GAMMA-TURN", "Turn", 36, 38, 2.1f,
+                            "s3dm"));
+    SequenceFeature sf = new SequenceFeature("Pfam", "", 20, 20, 0f,
+            "Uniprot");
+    sf.setAttributes("x=y;black=white");
+    sf.setStrand("+");
+    sf.setPhase("2");
+    al.getSequenceAt(1).addSequenceFeature(sf);
+
+    /*
+     * with no features displayed, exclude non-positional features
+     */
+    exported = featuresFile.printGffFormat(al.getSequencesArray(), visible,
+            visibleGroups, false);
+    assertEquals(gffHeader, exported);
+
+    /*
+     * include non-positional features
+     */
+    visibleGroups.add("Uniprot");
+    exported = featuresFile.printGffFormat(al.getSequencesArray(), visible,
+            visibleGroups, true);
+    String expected = gffHeader
+            + "FER_CAPAA\tUniprot\tDomain\t0\t0\t0.0\t.\t.\n";
+    assertEquals(expected, exported);
+
+    /*
+     * set METAL (in uniprot group) and GAMMA-TURN visible, but not Pfam
+     * only Uniprot group visible here...
+     */
+    fr.setVisible("METAL");
+    fr.setVisible("GAMMA-TURN");
+    visible = fr.getDisplayedFeatureCols();
+    exported = featuresFile.printGffFormat(al.getSequencesArray(), visible,
+            visibleGroups, false);
+    // METAL feature has null group: description used for column 2
+    expected = gffHeader + "FER_CAPAA\tCath\tMETAL\t39\t39\t1.2\t.\t.\n";
+    assertEquals(expected, exported);
+
+    /*
+     * set s3dm group visible
+     */
+    visibleGroups.add("s3dm");
+    exported = featuresFile.printGffFormat(al.getSequencesArray(), visible,
+            visibleGroups, false);
+    // METAL feature has null group: description used for column 2
+    expected = gffHeader + "FER_CAPAA\tCath\tMETAL\t39\t39\t1.2\t.\t.\n"
+            + "FER_CAPAN\ts3dm\tGAMMA-TURN\t36\t38\t2.1\t.\t.\n";
+    assertEquals(expected, exported);
+
+    /*
+     * now set Pfam visible
+     */
+    fr.setVisible("Pfam");
+    visible = fr.getDisplayedFeatureCols();
+    exported = featuresFile.printGffFormat(al.getSequencesArray(), visible,
+            visibleGroups, false);
+    // Pfam feature columns include strand(+), phase(2), attributes
+    expected = gffHeader
+            + "FER_CAPAA\tCath\tMETAL\t39\t39\t1.2\t.\t.\n"
+            + "FER_CAPAN\ts3dm\tGAMMA-TURN\t36\t38\t2.1\t.\t.\n"
+            + "FER_CAPAN\tUniprot\tPfam\t20\t20\t0.0\t+\t2\tx=y;black=white\n";
     assertEquals(expected, exported);
   }
 }