import static org.testng.AssertJUnit.assertEquals;
import static org.testng.AssertJUnit.assertNull;
+import static org.testng.AssertJUnit.assertSame;
import java.awt.Color;
assertEquals("#800080", ColorUtils.toTkCode(new Color(128, 0, 128))); // purple
assertEquals("#00ff00", ColorUtils.toTkCode(new Color(0, 255, 0))); // lime
}
+
+ @Test(groups = { "Functional" })
+ public void testGetGraduatedColour()
+ {
+ Color minColour = new Color(100, 100, 100);
+ Color maxColour = new Color(180, 200, 220);
+
+ /*
+ * value half-way between min and max
+ */
+ Color col = ColorUtils.getGraduatedColour(20f, 10f, minColour, 30f,
+ maxColour);
+ assertEquals(140, col.getRed());
+ assertEquals(150, col.getGreen());
+ assertEquals(160, col.getBlue());
+
+ /*
+ * value two-thirds of the way between min and max
+ */
+ col = ColorUtils
+ .getGraduatedColour(30f, 10f, minColour, 40f, maxColour);
+ assertEquals(153, col.getRed());
+ // Color constructor rounds float value to nearest int
+ assertEquals(167, col.getGreen());
+ assertEquals(180, col.getBlue());
+
+ /*
+ * value = min
+ */
+ col = ColorUtils
+ .getGraduatedColour(10f, 10f, minColour, 30f, maxColour);
+ assertEquals(minColour, col);
+
+ /*
+ * value = max
+ */
+ col = ColorUtils
+ .getGraduatedColour(30f, 10f, minColour, 30f, maxColour);
+ assertEquals(maxColour, col);
+
+ /*
+ * value < min
+ */
+ col = ColorUtils.getGraduatedColour(0f, 10f, minColour, 30f, maxColour);
+ assertEquals(minColour, col);
+
+ /*
+ * value > max
+ */
+ col = ColorUtils
+ .getGraduatedColour(40f, 10f, minColour, 30f, maxColour);
+ assertEquals(maxColour, col);
+
+ /*
+ * min = max
+ */
+ col = ColorUtils
+ .getGraduatedColour(40f, 10f, minColour, 10f, maxColour);
+ assertEquals(minColour, col);
+ }
+
+ @Test(groups = { "Functional" })
+ public void testBleachColour()
+ {
+ Color colour = new Color(155, 105, 55);
+ assertSame(colour, ColorUtils.bleachColour(colour, 0));
+ assertEquals(Color.WHITE, ColorUtils.bleachColour(colour, 1));
+ assertEquals(Color.WHITE, ColorUtils.bleachColour(colour, 2));
+ assertEquals(new Color(175, 135, 95),
+ ColorUtils.bleachColour(colour, 0.2f));
+ assertEquals(new Color(225, 210, 195),
+ ColorUtils.bleachColour(colour, 0.7f));
+
+ /*
+ * and some 'negative fade'
+ */
+ assertEquals(Color.BLACK, ColorUtils.bleachColour(colour, -1));
+ assertEquals(Color.BLACK, ColorUtils.bleachColour(colour, -2));
+ assertEquals(new Color(124, 84, 44),
+ ColorUtils.bleachColour(colour, -0.2f));
+ assertEquals(new Color(46, 31, 16), // with rounding down
+ ColorUtils.bleachColour(colour, -0.7f));
+ }
}