test/jalview/schemes/FeatureColourTest.java

   1 /*
   2  * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
   3  * Copyright (C) $$Year-Rel$$ The Jalview Authors
   4  *
   5  * This file is part of Jalview.
   6  *
   7  * Jalview is free software: you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation, either version 3
  10  * of the License, or (at your option) any later version.
  11  *
  12  * Jalview is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty
  14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  15  * PURPOSE.  See the GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
  19  * The Jalview Authors are detailed in the 'AUTHORS' file.
  20  */
  21 package jalview.schemes;
  22
  23 import static org.testng.AssertJUnit.assertEquals;
  24 import static org.testng.AssertJUnit.assertFalse;
  25 import static org.testng.AssertJUnit.assertNull;
  26 import static org.testng.AssertJUnit.assertTrue;
  27 import static org.testng.AssertJUnit.fail;
  28 import static org.testng.internal.junit.ArrayAsserts.assertArrayEquals;
  29
  30 import jalview.api.FeatureColourI;
  31 import jalview.datamodel.SequenceFeature;
  32 import jalview.gui.JvOptionPane;
  33 import jalview.util.ColorUtils;
  34 import jalview.util.Format;
  35
  36 import java.awt.Color;
  37
  38 import org.testng.annotations.BeforeClass;
  39 import org.testng.annotations.Test;
  40
  41 import junit.extensions.PA;
  42
  43 public class FeatureColourTest
  44 {
  45
  46   @BeforeClass(alwaysRun = true)
  47   public void setUpJvOptionPane()
  48   {
  49     JvOptionPane.setInteractiveMode(false);
  50     JvOptionPane.setMockResponse(JvOptionPane.CANCEL_OPTION);
  51   }
  52
  53   @Test(groups = { "Functional" })
  54   public void testCopyConstructor()
  55   {
  56     /*
  57      * plain colour
  58      */
  59     FeatureColour fc = new FeatureColour(Color.RED);
  60     FeatureColour fc1 = new FeatureColour(fc);
  61     assertTrue(fc1.getColour().equals(Color.RED));
  62     assertFalse(fc1.isGraduatedColour());
  63     assertFalse(fc1.isColourByLabel());
  64     assertFalse(fc1.isColourByAttribute());
  65     assertNull(fc1.getAttributeName());
  66
  67     /*
  68      * min-max colour
  69      */
  70     fc = new FeatureColour(Color.gray, Color.black, 10f, 20f);
  71     fc.setAboveThreshold(true);
  72     fc.setThreshold(12f);
  73     fc1 = new FeatureColour(fc);
  74     assertTrue(fc1.isGraduatedColour());
  75     assertFalse(fc1.isColourByLabel());
  76     assertTrue(fc1.isAboveThreshold());
  77     assertFalse(fc1.isColourByAttribute());
  78     assertNull(fc1.getAttributeName());
  79     assertEquals(12f, fc1.getThreshold());
  80     assertEquals(Color.gray, fc1.getMinColour());
  81     assertEquals(Color.black, fc1.getMaxColour());
  82     assertEquals(Color.gray, fc1.getNoColour());
  83     assertEquals(10f, fc1.getMin());
  84     assertEquals(20f, fc1.getMax());
  85
  86     /*
  87      * min-max-noValue colour
  88      */
  89     fc = new FeatureColour(Color.gray, Color.black, Color.green, 10f, 20f);
  90     fc.setAboveThreshold(true);
  91     fc.setThreshold(12f);
  92     fc1 = new FeatureColour(fc);
  93     assertTrue(fc1.isGraduatedColour());
  94     assertFalse(fc1.isColourByLabel());
  95     assertFalse(fc1.isColourByAttribute());
  96     assertNull(fc1.getAttributeName());
  97     assertTrue(fc1.isAboveThreshold());
  98     assertEquals(12f, fc1.getThreshold());
  99     assertEquals(Color.gray, fc1.getMinColour());
 100     assertEquals(Color.black, fc1.getMaxColour());
 101     assertEquals(Color.green, fc1.getNoColour());
 102     assertEquals(10f, fc1.getMin());
 103     assertEquals(20f, fc1.getMax());
 104
 105     /*
 106      * colour by label
 107      */
 108     fc = new FeatureColour();
 109     fc.setColourByLabel(true);
 110     fc1 = new FeatureColour(fc);
 111     assertTrue(fc1.isColourByLabel());
 112     assertFalse(fc1.isGraduatedColour());
 113     assertFalse(fc1.isColourByAttribute());
 114     assertNull(fc1.getAttributeName());
 115
 116     /*
 117      * colour by attribute (label)
 118      */
 119     fc = new FeatureColour();
 120     fc.setColourByLabel(true);
 121     fc.setAttributeName("AF");
 122     fc1 = new FeatureColour(fc);
 123     assertTrue(fc1.isColourByLabel());
 124     assertFalse(fc1.isGraduatedColour());
 125     assertTrue(fc1.isColourByAttribute());
 126     assertArrayEquals(new String[] { "AF" }, fc1.getAttributeName());
 127
 128     /*
 129      * colour by attribute (value)
 130      */
 131     fc = new FeatureColour(Color.gray, Color.black, Color.green, 10f, 20f);
 132     fc.setAboveThreshold(true);
 133     fc.setThreshold(12f);
 134     fc.setAttributeName("AF");
 135     fc1 = new FeatureColour(fc);
 136     assertTrue(fc1.isGraduatedColour());
 137     assertFalse(fc1.isColourByLabel());
 138     assertTrue(fc1.isColourByAttribute());
 139     assertArrayEquals(new String[] { "AF" }, fc1.getAttributeName());
 140     assertTrue(fc1.isAboveThreshold());
 141     assertEquals(12f, fc1.getThreshold());
 142     assertEquals(Color.gray, fc1.getMinColour());
 143     assertEquals(Color.black, fc1.getMaxColour());
 144     assertEquals(Color.green, fc1.getNoColour());
 145     assertEquals(10f, fc1.getMin());
 146     assertEquals(20f, fc1.getMax());
 147   }
 148
 149   @Test(groups = { "Functional" })
 150   public void testCopyConstructor_minMax()
 151   {
 152     /*
 153      * graduated colour
 154      */
 155     FeatureColour fc = new FeatureColour(Color.BLUE, Color.RED, 1f, 5f);
 156     assertTrue(fc.isGraduatedColour());
 157     assertFalse(fc.isColourByLabel());
 158     assertFalse(fc.isColourByAttribute());
 159     assertNull(fc.getAttributeName());
 160     assertEquals(1f, fc.getMin());
 161     assertEquals(5f, fc.getMax());
 162
 163     /*
 164      * update min-max bounds
 165      */
 166     FeatureColour fc1 = new FeatureColour(fc, 2f, 6f);
 167     assertTrue(fc1.isGraduatedColour());
 168     assertFalse(fc1.isColourByLabel());
 169     assertFalse(fc1.isColourByAttribute());
 170     assertNull(fc1.getAttributeName());
 171     assertEquals(2f, fc1.getMin());
 172     assertEquals(6f, fc1.getMax());
 173     assertFalse((boolean) PA.getValue(fc1, "isHighToLow"));
 174
 175     /*
 176      * update min-max bounds - high to low
 177      */
 178     fc1 = new FeatureColour(fc, 23f, 16f);
 179     assertTrue(fc1.isGraduatedColour());
 180     assertFalse(fc1.isColourByLabel());
 181     assertFalse(fc1.isColourByAttribute());
 182     assertNull(fc1.getAttributeName());
 183     assertEquals(23f, fc1.getMin());
 184     assertEquals(16f, fc1.getMax());
 185     assertTrue((boolean) PA.getValue(fc1, "isHighToLow"));
 186
 187     /*
 188      * graduated colour by attribute
 189      */
 190     fc1.setAttributeName("AF");
 191     fc1 = new FeatureColour(fc1, 13f, 36f);
 192     assertTrue(fc1.isGraduatedColour());
 193     assertFalse(fc1.isColourByLabel());
 194     assertTrue(fc1.isColourByAttribute());
 195     assertArrayEquals(new String[] { "AF" }, fc1.getAttributeName());
 196     assertEquals(13f, fc1.getMin());
 197     assertEquals(36f, fc1.getMax());
 198     assertFalse((boolean) PA.getValue(fc1, "isHighToLow"));
 199
 200     /*
 201      * colour by label
 202      */
 203     fc = new FeatureColour(Color.BLUE, Color.RED, 1f, 5f);
 204     fc.setColourByLabel(true);
 205     assertFalse(fc.isGraduatedColour());
 206     assertTrue(fc.isColourByLabel());
 207     assertFalse(fc.isColourByAttribute());
 208     assertNull(fc.getAttributeName());
 209     assertEquals(1f, fc.getMin());
 210     assertEquals(5f, fc.getMax());
 211
 212     /*
 213      * update min-max bounds
 214      */
 215     fc1 = new FeatureColour(fc, 2f, 6f);
 216     assertFalse(fc1.isGraduatedColour());
 217     assertTrue(fc1.isColourByLabel());
 218     assertFalse(fc1.isColourByAttribute());
 219     assertNull(fc1.getAttributeName());
 220     assertEquals(2f, fc1.getMin());
 221     assertEquals(6f, fc1.getMax());
 222
 223     /*
 224      * colour by attribute text
 225      */
 226     fc1.setAttributeName("AC");
 227     fc1 = new FeatureColour(fc1, 13f, 36f);
 228     assertFalse(fc1.isGraduatedColour());
 229     assertTrue(fc1.isColourByLabel());
 230     assertTrue(fc1.isColourByAttribute());
 231     assertArrayEquals(new String[] { "AC" }, fc1.getAttributeName());
 232     assertEquals(13f, fc1.getMin());
 233     assertEquals(36f, fc1.getMax());
 234   }
 235
 236   @Test(groups = { "Functional" })
 237   public void testGetColor_simpleColour()
 238   {
 239     FeatureColour fc = new FeatureColour(Color.RED);
 240     assertEquals(Color.RED,
 241             fc.getColor(new SequenceFeature("Cath", "", 1, 2, 0f, null)));
 242   }
 243
 244   @Test(groups = { "Functional" })
 245   public void testGetColor_colourByLabel()
 246   {
 247     FeatureColour fc = new FeatureColour();
 248     fc.setColourByLabel(true);
 249     SequenceFeature sf = new SequenceFeature("type", "desc", 0, 20, 1f,
 250             null);
 251     Color expected = ColorUtils.createColourFromName("desc");
 252     assertEquals(expected, fc.getColor(sf));
 253   }
 254
 255   @Test(groups = { "Functional" })
 256   public void testGetColor_Graduated()
 257   {
 258     /*
 259      * graduated colour from
 260      * score 0 to 100
 261      * gray(128, 128, 128) to red(255, 0, 0)
 262      */
 263     FeatureColour fc = new FeatureColour(Color.GRAY, Color.RED, 0f, 100f);
 264     // feature score is 75 which is 3/4 of the way from GRAY to RED
 265     SequenceFeature sf = new SequenceFeature("type", "desc", 0, 20, 75f,
 266             null);
 267     // the colour gradient is computed in float values from 0-1 (where 1 == 255)
 268     float red = 128 / 255f + 3 / 4f * (255 - 128) / 255f;
 269     float green = 128 / 255f + 3 / 4f * (0 - 128) / 255f;
 270     float blue = 128 / 255f + 3 / 4f * (0 - 128) / 255f;
 271     Color expected = new Color(red, green, blue);
 272     assertEquals(expected, fc.getColor(sf));
 273   }
 274
 275   @Test(groups = { "Functional" })
 276   public void testGetColor_aboveBelowThreshold()
 277   {
 278     // gradient from [50, 150] from WHITE(255, 255, 255) to BLACK(0, 0, 0)
 279     FeatureColour fc = new FeatureColour(Color.WHITE, Color.BLACK, 50f,
 280             150f);
 281     SequenceFeature sf = new SequenceFeature("type", "desc", 0, 20, 70f,
 282             null);
 283
 284     /*
 285      * feature with score of Float.NaN is always assigned minimum colour
 286      */
 287     SequenceFeature sf2 = new SequenceFeature("type", "desc", 0, 20,
 288             Float.NaN, null);
 289
 290     fc.setThreshold(100f); // ignore for now
 291     assertEquals(new Color(204, 204, 204), fc.getColor(sf));
 292     assertEquals(Color.white, fc.getColor(sf2));
 293
 294     fc.setAboveThreshold(true); // feature lies below threshold
 295     assertNull(fc.getColor(sf));
 296     assertEquals(Color.white, fc.getColor(sf2));
 297
 298     fc.setBelowThreshold(true);
 299     fc.setThreshold(70f);
 300     assertNull(fc.getColor(sf)); // feature score == threshold - hidden
 301     assertEquals(Color.white, fc.getColor(sf2));
 302     fc.setThreshold(69f);
 303     assertNull(fc.getColor(sf)); // feature score > threshold - hidden
 304     assertEquals(Color.white, fc.getColor(sf2));
 305   }
 306
 307   /**
 308    * Test output of feature colours to Jalview features file format
 309    */
 310   @Test(groups = { "Functional" })
 311   public void testToJalviewFormat()
 312   {
 313     /*
 314      * plain colour - to RGB hex code
 315      */
 316     FeatureColour fc = new FeatureColour(Color.RED);
 317     String redHex = Format.getHexString(Color.RED);
 318     String hexColour = redHex;
 319     assertEquals("domain\t" + hexColour, fc.toJalviewFormat("domain"));
 320
 321     /*
 322      * colour by label (no threshold)
 323      */
 324     fc = new FeatureColour();
 325     fc.setColourByLabel(true);
 326     assertEquals("domain\tlabel", fc.toJalviewFormat("domain"));
 327
 328     /*
 329      * colour by attribute text (no threshold)
 330      */
 331     fc = new FeatureColour();
 332     fc.setColourByLabel(true);
 333     fc.setAttributeName("CLIN_SIG");
 334     assertEquals("domain\tattribute|CLIN_SIG", fc.toJalviewFormat("domain"));
 335
 336     /*
 337      * colour by label (autoscaled) (an odd state you can reach by selecting
 338      * 'above threshold', then deselecting 'threshold is min/max' then 'colour
 339      * by label')
 340      */
 341     fc.setAttributeName((String[]) null);
 342     fc.setAutoScaled(true);
 343     assertEquals("domain\tlabel", fc.toJalviewFormat("domain"));
 344
 345     /*
 346      * colour by label (above threshold)
 347      */
 348     fc.setAutoScaled(false);
 349     fc.setThreshold(12.5f);
 350     fc.setAboveThreshold(true);
 351     // min/max values are output though not used by this scheme
 352     assertEquals("domain\tlabel|||0.0|0.0|above|12.5",
 353             fc.toJalviewFormat("domain"));
 354
 355     /*
 356      * colour by label (below threshold)
 357      */
 358     fc.setBelowThreshold(true);
 359     assertEquals("domain\tlabel|||0.0|0.0|below|12.5",
 360             fc.toJalviewFormat("domain"));
 361
 362     /*
 363      * colour by attributes text (below threshold)
 364      */
 365     fc.setBelowThreshold(true);
 366     fc.setAttributeName("CSQ", "Consequence");
 367     assertEquals("domain\tattribute|CSQ:Consequence|||0.0|0.0|below|12.5",
 368             fc.toJalviewFormat("domain"));
 369
 370     /*
 371      * graduated colour by score, no threshold
 372      * - default constructor sets noValueColor = minColor
 373      */
 374     fc = new FeatureColour(Color.GREEN, Color.RED, 12f, 25f);
 375     String greenHex = Format.getHexString(Color.GREEN);
 376     String expected = String.format(
 377             "domain\tscore|%s|%s|noValueMin|abso|12.0|25.0|none", greenHex,
 378             redHex);
 379     assertEquals(expected, fc.toJalviewFormat("domain"));
 380
 381     /*
 382      * graduated colour by score, no threshold, no value gets min colour
 383      */
 384     fc = new FeatureColour(Color.GREEN, Color.RED, Color.GREEN, 12f, 25f);
 385     expected = String.format(
 386             "domain\tscore|%s|%s|noValueMin|abso|12.0|25.0|none", greenHex,
 387             redHex);
 388     assertEquals(expected, fc.toJalviewFormat("domain"));
 389
 390     /*
 391      * graduated colour by score, no threshold, no value gets max colour
 392      */
 393     fc = new FeatureColour(Color.GREEN, Color.RED, Color.RED, 12f, 25f);
 394     expected = String.format(
 395             "domain\tscore|%s|%s|noValueMax|abso|12.0|25.0|none", greenHex,
 396             redHex);
 397     assertEquals(expected, fc.toJalviewFormat("domain"));
 398
 399     /*
 400      * colour ranges over the actual score ranges (not min/max)
 401      */
 402     fc.setAutoScaled(true);
 403     expected = String.format(
 404             "domain\tscore|%s|%s|noValueMax|12.0|25.0|none", greenHex,
 405             redHex);
 406     assertEquals(expected, fc.toJalviewFormat("domain"));
 407
 408     /*
 409      * graduated colour by score, below threshold
 410      */
 411     fc.setThreshold(12.5f);
 412     fc.setBelowThreshold(true);
 413     expected = String.format(
 414             "domain\tscore|%s|%s|noValueMax|12.0|25.0|below|12.5",
 415             greenHex, redHex);
 416     assertEquals(expected, fc.toJalviewFormat("domain"));
 417
 418     /*
 419      * graduated colour by score, above threshold
 420      */
 421     fc.setThreshold(12.5f);
 422     fc.setAboveThreshold(true);
 423     fc.setAutoScaled(false);
 424     expected = String.format(
 425             "domain\tscore|%s|%s|noValueMax|abso|12.0|25.0|above|12.5",
 426             greenHex, redHex);
 427     assertEquals(expected, fc.toJalviewFormat("domain"));
 428
 429     /*
 430      * graduated colour by attribute, above threshold
 431      */
 432     fc.setAttributeName("CSQ", "AF");
 433     fc.setAboveThreshold(true);
 434     fc.setAutoScaled(false);
 435     expected = String.format(
 436             "domain\tattribute|CSQ:AF|%s|%s|noValueMax|abso|12.0|25.0|above|12.5",
 437             greenHex, redHex);
 438     assertEquals(expected, fc.toJalviewFormat("domain"));
 439   }
 440
 441   /**
 442    * Test parsing of feature colours from Jalview features file format
 443    */
 444   @Test(groups = { "Functional" })
 445   public void testParseJalviewFeatureColour()
 446   {
 447     /*
 448      * simple colour by name
 449      */
 450     FeatureColourI fc = FeatureColour.parseJalviewFeatureColour("red");
 451     assertTrue(fc.isSimpleColour());
 452     assertEquals(Color.RED, fc.getColour());
 453
 454     /*
 455      * simple colour by hex code
 456      */
 457     fc = FeatureColour.parseJalviewFeatureColour(Format
 458             .getHexString(Color.RED));
 459     assertTrue(fc.isSimpleColour());
 460     assertEquals(Color.RED, fc.getColour());
 461
 462     /*
 463      * simple colour by rgb triplet
 464      */
 465     fc = FeatureColour.parseJalviewFeatureColour("255,0,0");
 466     assertTrue(fc.isSimpleColour());
 467     assertEquals(Color.RED, fc.getColour());
 468
 469     /*
 470      * malformed colour
 471      */
 472     try
 473     {
 474       fc = FeatureColour.parseJalviewFeatureColour("oops");
 475       fail("expected exception");
 476     } catch (IllegalArgumentException e)
 477     {
 478       assertEquals("Invalid colour descriptor: oops", e.getMessage());
 479     }
 480
 481     /*
 482      * colour by label (no threshold)
 483      */
 484     fc = FeatureColour.parseJalviewFeatureColour("label");
 485     assertTrue(fc.isColourByLabel());
 486     assertFalse(fc.hasThreshold());
 487
 488     /*
 489      * colour by label (with threshold)
 490      */
 491     fc = FeatureColour
 492             .parseJalviewFeatureColour("label|||0.0|0.0|above|12.0");
 493     assertTrue(fc.isColourByLabel());
 494     assertTrue(fc.isAboveThreshold());
 495     assertEquals(12.0f, fc.getThreshold());
 496
 497     /*
 498      * colour by attribute text (no threshold)
 499      */
 500     fc = FeatureColour.parseJalviewFeatureColour("attribute|CLIN_SIG");
 501     assertTrue(fc.isColourByAttribute());
 502     assertTrue(fc.isColourByLabel());
 503     assertFalse(fc.hasThreshold());
 504     assertArrayEquals(new String[] { "CLIN_SIG" }, fc.getAttributeName());
 505
 506     /*
 507      * colour by attributes text (with score threshold)
 508      */
 509     fc = FeatureColour.parseJalviewFeatureColour(
 510             "attribute|CSQ:Consequence|||0.0|0.0|above|12.0");
 511     assertTrue(fc.isColourByLabel());
 512     assertTrue(fc.isColourByAttribute());
 513     assertArrayEquals(new String[] { "CSQ", "Consequence" },
 514             fc.getAttributeName());
 515     assertTrue(fc.isAboveThreshold());
 516     assertEquals(12.0f, fc.getThreshold());
 517
 518     /*
 519      * graduated colour by score (with colour names) (no threshold)
 520      */
 521     fc = FeatureColour.parseJalviewFeatureColour("red|green|10.0|20.0");
 522     assertTrue(fc.isGraduatedColour());
 523     assertFalse(fc.hasThreshold());
 524     assertEquals(Color.RED, fc.getMinColour());
 525     assertEquals(Color.GREEN, fc.getMaxColour());
 526     assertEquals(10f, fc.getMin());
 527     assertEquals(20f, fc.getMax());
 528     assertTrue(fc.isAutoScaled());
 529
 530     /*
 531      * graduated colour (explicitly by 'score') (no threshold)
 532      */
 533     fc = FeatureColour
 534             .parseJalviewFeatureColour("Score|red|green|10.0|20.0");
 535     assertTrue(fc.isGraduatedColour());
 536     assertFalse(fc.hasThreshold());
 537     assertEquals(Color.RED, fc.getMinColour());
 538     assertEquals(Color.GREEN, fc.getMaxColour());
 539     assertEquals(10f, fc.getMin());
 540     assertEquals(20f, fc.getMax());
 541     assertTrue(fc.isAutoScaled());
 542
 543     /*
 544      * graduated colour by attribute (no threshold)
 545      */
 546     fc = FeatureColour
 547             .parseJalviewFeatureColour("attribute|AF|red|green|10.0|20.0");
 548     assertTrue(fc.isGraduatedColour());
 549     assertTrue(fc.isColourByAttribute());
 550     assertArrayEquals(new String[] { "AF" }, fc.getAttributeName());
 551     assertFalse(fc.hasThreshold());
 552     assertEquals(Color.RED, fc.getMinColour());
 553     assertEquals(Color.GREEN, fc.getMaxColour());
 554     assertEquals(10f, fc.getMin());
 555     assertEquals(20f, fc.getMax());
 556     assertTrue(fc.isAutoScaled());
 557
 558     /*
 559      * graduated colour by score (colours by hex code) (above threshold)
 560      */
 561     String descriptor = String.format("%s|%s|10.0|20.0|above|15",
 562             Format.getHexString(Color.RED),
 563             Format.getHexString(Color.GREEN));
 564     fc = FeatureColour.parseJalviewFeatureColour(descriptor);
 565     assertTrue(fc.isGraduatedColour());
 566     assertTrue(fc.hasThreshold());
 567     assertTrue(fc.isAboveThreshold());
 568     assertEquals(15f, fc.getThreshold());
 569     assertEquals(Color.RED, fc.getMinColour());
 570     assertEquals(Color.GREEN, fc.getMaxColour());
 571     assertEquals(10f, fc.getMin());
 572     assertEquals(20f, fc.getMax());
 573     assertTrue(fc.isAutoScaled());
 574
 575     /*
 576      * graduated colour by attributes (below threshold)
 577      */
 578     fc = FeatureColour.parseJalviewFeatureColour(
 579             "attribute|CSQ:AF|red|green|10.0|20.0|below|13");
 580     assertTrue(fc.isGraduatedColour());
 581     assertTrue(fc.isColourByAttribute());
 582     assertArrayEquals(new String[] { "CSQ", "AF" }, fc.getAttributeName());
 583     assertTrue(fc.hasThreshold());
 584     assertTrue(fc.isBelowThreshold());
 585     assertEquals(13f, fc.getThreshold());
 586     assertEquals(Color.RED, fc.getMinColour());
 587     assertEquals(Color.GREEN, fc.getMaxColour());
 588     assertEquals(10f, fc.getMin());
 589     assertEquals(20f, fc.getMax());
 590     assertTrue(fc.isAutoScaled());
 591
 592     /*
 593      * graduated colour (by RGB triplet) (below threshold), absolute scale
 594      */
 595     descriptor = "255,0,0|0,255,0|abso|10.0|20.0|below|15";
 596     fc = FeatureColour.parseJalviewFeatureColour(descriptor);
 597     assertTrue(fc.isGraduatedColour());
 598     assertFalse(fc.isAutoScaled());
 599     assertTrue(fc.hasThreshold());
 600     assertTrue(fc.isBelowThreshold());
 601     assertEquals(15f, fc.getThreshold());
 602     assertEquals(Color.RED, fc.getMinColour());
 603     assertEquals(Color.GREEN, fc.getMaxColour());
 604     assertEquals(10f, fc.getMin());
 605     assertEquals(20f, fc.getMax());
 606
 607     descriptor = "blue|255,0,255|absolute|20.0|95.0|below|66.0";
 608     fc = FeatureColour.parseJalviewFeatureColour(descriptor);
 609     assertTrue(fc.isGraduatedColour());
 610   }
 611
 612   @Test(groups = { "Functional" })
 613   public void testGetColor_colourByAttributeText()
 614   {
 615     FeatureColour fc = new FeatureColour();
 616     fc.setColourByLabel(true);
 617     fc.setAttributeName("consequence");
 618     SequenceFeature sf = new SequenceFeature("type", "desc", 0, 20, 1f,
 619             null);
 620
 621     /*
 622      * if feature has no such attribute, use 'no value' colour
 623      */
 624     assertEquals(FeatureColour.DEFAULT_NO_COLOUR, fc.getColor(sf));
 625
 626     /*
 627      * if feature has attribute, generate colour from value
 628      */
 629     sf.setValue("consequence", "benign");
 630     Color expected = ColorUtils.createColourFromName("benign");
 631     assertEquals(expected, fc.getColor(sf));
 632   }
 633
 634   @Test(groups = { "Functional" })
 635   public void testGetColor_GraduatedByAttributeValue()
 636   {
 637     /*
 638      * graduated colour based on attribute value for AF
 639      * given a min-max range of 0-100
 640      */
 641     FeatureColour fc = new FeatureColour(new Color(50, 100, 150),
 642             new Color(150, 200, 250), Color.yellow, 0f, 100f);
 643     String attName = "AF";
 644     fc.setAttributeName(attName);
 645
 646     /*
 647      * first case: feature lacks the attribute - use 'no value' colour
 648      */
 649     SequenceFeature sf = new SequenceFeature("type", "desc", 0, 20, 75f,
 650             null);
 651     assertEquals(Color.yellow, fc.getColor(sf));
 652
 653     /*
 654      * second case: attribute present but not numeric - treat as if absent
 655      */
 656     sf.setValue(attName, "twelve");
 657     assertEquals(Color.yellow, fc.getColor(sf));
 658
 659     /*
 660      * third case: valid attribute value
 661      */
 662     sf.setValue(attName, "20.0");
 663     Color expected = new Color(70, 120, 170);
 664     assertEquals(expected, fc.getColor(sf));
 665   }
 666 }