This tests checks that ellipse can draw lines correctly in edge cases. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS imageData.data[1] is 255 moveTo + empty ellipse (swing == 0) PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 moveTo + empty ellipse (radiusX == 0) PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 moveTo + empty ellipse (radiusY == 0) PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 empty ellipse (swing == 0) + lineTo PASS imageData.data[1] is 255 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 empty ellipse (radiusX == 0) + lineTo PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 empty ellipse (radiusY == 0) + lineTo PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 lineTo + empty ellipse (radiusX == 0) + lineTo 1. sweepAngle < PI / 2 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 2. sweepAngle < PI PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 3. sweepAngle < 2PI PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 4. sweepAngle < 4PI PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 255 5. sweepAngle > 4PI PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 255 lineTo + empty ellipse (radiusY == 0) + lineTo 1. sweepAngle < PI / 2 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 2. sweepAngle < PI FAIL imageData.data[1] should be 0. Was 8. PASS imageData.data[1] is 255 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 3. sweepAngle < 2PI PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 4. sweepAngle < 4PI PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 5. sweepAngle > 4PI PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS imageData.data[1] is 0 PASS successfullyParsed is true Some tests failed. TEST COMPLETE