testZoomableImage doesn't pass here

tsdgeos_work@xps:~/phablet/unity8/zoomImage/builddir$ make testZoomableImage
Scanning dependencies of target testZoomableImage
********* Start testing of qmltestrunner *********
Config: Using QtTest library 5.2.1, Qt 5.2.1
PASS   : qmltestrunner::ZoomableImageTest::initTestCase()
PASS   : qmltestrunner::ZoomableImageTest::test_loadImage()
PASS   : qmltestrunner::ZoomableImageTest::test_mousewheel()
PASS   : qmltestrunner::ZoomableImageTest::test_pinch(row 0)
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.0223712539150298 image.scale = 1.0223712539150298
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.0357940073993845 image.scale = 1.0357940073993845
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.0581652649948587 image.scale = 1.0581652649948587
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.0738228162358237 image.scale = 1.0738228162358237
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.0894850291524478 image.scale = 1.0894850291524478
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.1118562916099062 image.scale = 1.1118562916099062
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.1252790499663978 image.scale = 1.1252790499663978
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.1476503152894069 image.scale = 1.1476503152894069
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.1633080509221423 image.scale = 1.1633080509221423
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.1789700895053916 image.scale = 1.1789700895053916
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.201341358651656 image.scale = 1.201341358651656
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.214764120838203 image.scale = 1.214764120838203
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.2371353922590045 image.scale = 1.2371353922590045
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.252793285608461 image.scale = 1.252793285608461
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.268455174455575 image.scale = 1.268455174455575
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.2908264489369636 image.scale = 1.2908264489369636
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.30424921418879 image.scale = 1.30424921418879
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.3266204905056826 image.scale = 1.3266204905056826
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.3422785202947793 image.scale = 1.3422785202947793
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.3579402791402966 image.scale = 1.3579402791402966
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.3803115579452152 image.scale = 1.3803115579452152
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.3937343256883903 image.scale = 1.3937343256883903
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.416105605995883 image.scale = 1.416105605995883
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.438476887185616 image.scale = 1.438476887185616
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.4474253998993731 image.scale = 1.4474253998993731
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.469796682256704 image.scale = 1.469796682256704
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.4832194520521227 image.scale = 1.4832194520521227
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.5055907356549871 image.scale = 1.5055907356549871
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.5279620199919275 image.scale = 1.5279620199919275
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.536910533925064 image.scale = 1.536910533925064
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.559281819236732 image.scale = 1.559281819236732
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.5727045907427295 image.scale = 1.5727045907427295
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.5950758770983329 image.scale = 1.5950758770983329
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.6174471640712516 image.scale = 1.6174471640712516
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.626395679027561 image.scale = 1.626395679027561
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.6487669668225833 image.scale = 1.6487669668225833
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.6621897397693335 image.scale = 1.6621897397693335
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.6845610284479569 image.scale = 1.6845610284479569
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.7069323176506408 image.scale = 1.7069323176506408
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.71588083347386 image.scale = 1.71588083347386
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.7382521233762958 image.scale = 1.7382521233762958
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.7516748975478769 image.scale = 1.7516748975478769
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Updated pinch.scale = 1.7740461882048026 image.scale = 1.7740461882048026
QDEBUG : qmltestrunner::ZoomableImageTest::test_pinch(row 1) Pinch Finished pinch.scale = 1.7740461882048026 image.scale = 1.7740461882048026
FAIL!  : qmltestrunner::ZoomableImageTest::test_pinch(row 1) property scale
   Actual   (): 1.7740461882048026
   Expected (): 1
   Loc: [/home/tsdgeos_work/phablet/unity8/zoomImage/tests/qmltests/Components/tst_ZoomableImage.qml(205)]