Python utilities_test.loadLayer函数代码示例

 def setUp(self):
     self.keywordIO = KeywordIO()
     myUri = QgsDataSourceURI()
     myUri.setDatabase(os.path.join(TESTDATA, 'jk.sqlite'))
     myUri.setDataSource('', 'osm_buildings', 'Geometry')
     self.sqliteLayer = QgsVectorLayer(myUri.uri(), 'OSM Buildings',
                                    'spatialite')
     myHazardPath = os.path.join(HAZDATA, 'Shakemap_Padang_2009.asc')
     self.fileRasterLayer, myType = loadLayer(myHazardPath,
                                              theDirectory=None)
     del myType
     self.fileVectorLayer, myType = loadLayer('Padang_WGS84.shp')
     del myType
     self.expectedSqliteKeywords = {'category': 'exposure',
                                    'datatype': 'OSM',
                                    'subcategory': 'building'}
     self.expectedVectorKeywords = {'category': 'exposure',
                                    'datatype': 'itb',
                                    'subcategory': 'structure'}
     self.expectedRasterKeywords = {'category': 'hazard',
                                    'source': 'USGS',
                                    'subcategory': 'earthquake',
                                    'unit': 'MMI',
                                    'title': ('An earthquake in Padang '
                                              'like in 2009')}

 def Xtest_renderTable(self):
     """Test that html renders nicely. Commented out for now until we work
     out how to get webkit to do offscreen rendering nicely."""
     myFilename = 'test_floodimpact.tif'
     myLayer, myType = loadLayer(myFilename)
     CANVAS.refresh()
     del myType
     myMessage = 'Layer is not valid: %s' % myFilename
     assert myLayer.isValid(), myMessage
     myMap = Map(IFACE)
     myMap.setImpactLayer(myLayer)
     myPixmap = myMap.renderImpactTable()
     assert myPixmap is not None
     myExpectedWidth = 500
     myExpectedHeight = 300
     myMessage = 'Invalid width - got %s expected %s' % (
                                 myPixmap.width(),
                                 myExpectedWidth)
     assert myPixmap.width() == myExpectedWidth, myMessage
     myMessage = 'Invalid height - got %s expected %s' % (
                                 myPixmap.height(),
                                 myExpectedHeight)
     assert myPixmap.height() == myExpectedHeight
     myPath = os.path.join(temp_dir(), 'renderImpactTable.png')
     myPixmap.save(myPath, 'PNG')
     myExpectedHash = 'c9164d5c2bb85c6081905456ab827f3e'
     assertHashForFile(myExpectedHash, myPath)

 def test_addClassToLegend(self):
     """Test we can add a class to the map legend."""
     myLayer, myType = loadLayer('test_shakeimpact.shp')
     del myType
     myMap = Map(IFACE)
     myMap.setImpactLayer(myLayer)
     myMap.legend = None
     myColour = QtGui.QColor(12, 34, 126)
     myMap.addClassToLegend(myColour,
                            theMin=None,
                            theMax=None,
                            theCategory=None,
                            theLabel='bar')
     myMap.addClassToLegend(myColour,
                            theMin=None,
                            theMax=None,
                            theCategory=None,
                            theLabel='foo')
     myPath = os.path.join(temp_dir(), 'addClassToLegend.png')
     myMap.legend.save(myPath, 'PNG')
     # As we have discovered, different versions of Qt and
     # OS platforms cause different output, so hashes are a list
     # of 'known good' renders.
     myExpectedHashes = ['',  # win
                         '67c0f45792318298664dd02cc0ac94c3',  # ub12.04xiner
                         'ea0702782c2ed5d950c427fbe1743858',  # ub11.04-64
                         '53e0ba1144e071ad41756595d29bf444',  # ub12.04
                         '0681c3587305074bc9272f456fb4dd09',  # ub12.04 xvfb
                         'a37443d70604bdc8c279576b424a158c',  # ub12.04-64
                         # ub11.04-64 laptop
                         '944cee3eb9d916816b60ef41e8069683',  # binary read
                         'de3ceb6547ffc6c557d031c0b7ee9e75',  # wVistaSP2-32
                         '',
                         ]
     assertHashesForFile(myExpectedHashes, myPath)

    def test_addSymbolToLegend(self):
        """Test we can add a symbol to the legend."""
        myLayer, _ = loadLayer('test_floodimpact.tif')
        myMapLegend = MapLegend(myLayer)
        mySymbol = QgsSymbol()
        mySymbol.setColor(QtGui.QColor(12, 34, 56))
        myMapLegend.addSymbolToLegend(mySymbol,
                                      theMin=0,
                                      # expect 2.0303 in legend
                                      theMax=2.02030,
                                      theCategory=None,
                                      theLabel='Foo')
        myPath = unique_filename(prefix='addSymbolToLegend',
                                 suffix='.png',
                                 dir=temp_dir('test'))
        myMapLegend.getLegend().save(myPath, 'PNG')
        LOGGER.debug(myPath)
        # As we have discovered, different versions of Qt and
        # OS platforms cause different output, so myControlImages is a list
        # of 'known good' renders.

        myTolerance = 0  # to allow for version number changes in disclaimer
        myFlag, myMessage = checkImages('addSymbolToLegend.png',
                                        myPath,
                                        myTolerance)
        myMessage += ('\nWe want these images to match, if they do already '
                      'copy the test image generated to create a new control '
                      'image.')
        assert myFlag, myMessage

    def test_getLegend(self):
        """Getting a legend for a generic layer works."""
        LOGGER.debug('test_getLegend called')
        myLayer, _ = loadLayer('test_shakeimpact.shp')
        myMapLegend = MapLegend(myLayer)
        assert myMapLegend.layer is not None
        myLegend = myMapLegend.getLegend()
        myPath = unique_filename(prefix='getLegend',
                                 suffix='.png',
                                 dir=temp_dir('test'))
        myLegend.save(myPath, 'PNG')
        LOGGER.debug(myPath)
        # As we have discovered, different versions of Qt and
        # OS platforms cause different output, so myControlImages is a list
        # of 'known good' renders.

        myTolerance = 0  # to allow for version number changes in disclaimer

        myFlag, myMessage = checkImages('getLegend.png',
                                        myPath,
                                        myTolerance)
        myMessage += ('\nWe want these images to match, if they do already '
                      'copy the test image generated to create a new control '
                      'image.')
        assert myFlag, myMessage
        LOGGER.debug('test_getLegend done')

def loadLayers(theLayerList, theClearFlag=True, theDataDirectory=TESTDATA):
    """Helper function to load layers as defined in a python list."""
    # First unload any layers that may already be loaded
    if theClearFlag:
        for myLayer in QgsMapLayerRegistry.instance().mapLayers():
            QgsMapLayerRegistry.instance().removeMapLayer(myLayer)

    # Now go ahead and load our layers
    myExposureLayerCount = 0
    myHazardLayerCount = 0
    myCanvasLayers = []

    # Now create our new layers
    for myFile in theLayerList:

        myLayer, myType = loadLayer(myFile, theDataDirectory)
        if myType == 'hazard':
            myHazardLayerCount += 1
        elif myType == 'exposure':
            myExposureLayerCount += 1
        # Add layer to the registry (that QGis knows about)
        QgsMapLayerRegistry.instance().addMapLayer(myLayer)

        # Create Map Canvas Layer Instance and add to list
        myCanvasLayers.append(QgsMapCanvasLayer(myLayer))

    # Quickly add any existing CANVAS layers to our list first
    for myLayer in CANVAS.layers():
        myCanvasLayers.append(QgsMapCanvasLayer(myLayer))
    # now load all these layers in the CANVAS
    CANVAS.setLayerSet(myCanvasLayers)
    DOCK.getLayers()

    # Add MCL's to the CANVAS
    return myHazardLayerCount, myExposureLayerCount

 def test_printImpactTable(self):
     """Test that we can render html from impact table keywords."""
     LOGGER.debug('InaSAFE HtmlRenderer testing printImpactTable')
     myFilename = 'test_floodimpact.tif'
     myLayer, _ = loadLayer(myFilename)
     myMessage = 'Layer is not valid: %s' % myFilename
     assert myLayer.isValid(), myMessage
     myPageDpi = 300
     myHtmlRenderer = HtmlRenderer(myPageDpi)
     myPath = unique_filename(prefix='impactTable',
                              suffix='.pdf',
                              dir=temp_dir('test'))
     myKeywordIO = KeywordIO()
     myKeywords = myKeywordIO.readKeywords(myLayer)
     myPath = myHtmlRenderer.printImpactTable(myKeywords,
                                              theFilename=myPath)
     myMessage = 'Rendered output does not exist: %s' % myPath
     assert os.path.exists(myPath), myMessage
     # pdf rendering is non deterministic so we can't do a hash check
     # test_renderComposition renders just the image instead of pdf
     # so we hash check there and here we just do a basic minimum file
     # size check.
     mySize = os.stat(myPath).st_size
     myExpectedSize = 20936  # as rendered on linux ub 12.04 64
     myMessage = ('Expected rendered table pdf to be at least %s, got %s'
                  % (myExpectedSize, mySize))
     assert mySize >= myExpectedSize, myMessage

 def test_addClassToLegend(self):
     """Test we can add a class to the map legend."""
     myLayer, _ = loadLayer('test_shakeimpact.shp')
     myMapLegend = MapLegend(myLayer)
     myColour = QtGui.QColor(12, 34, 126)
     myMapLegend.addClassToLegend(myColour,
                                  theMin=None,
                                  theMax=None,
                                  theCategory=None,
                                  theLabel='bar')
     myMapLegend.addClassToLegend(myColour,
                                  theMin=None,
                                  theMax=None,
                                  theCategory=None,
                                  theLabel='foo')
     myPath = unique_filename(prefix='addClassToLegend',
                              suffix='.png',
                              dir=temp_dir('test'))
     myMapLegend.getLegend().save(myPath, 'PNG')
     LOGGER.debug(myPath)
     # As we have discovered, different versions of Qt and
     # OS platforms cause different output, so place any other possible
     # variants in the safe_qgis/test_data/test_images/ dir e.g.
     # addClassToLegend-variantUbuntu13.04.png
     myTolerance = 0  # to allow for version number changes in disclaimer
     myFlag, myMessage = checkImages('addClassToLegend.png',
                                     myPath,
                                     myTolerance)
     myMessage += ('\nWe want these images to match, if they do already '
                   'copy the test image generated to create a new control '
                   'image.')
     assert myFlag, myMessage

 def test_printToPdf(self):
     """Test making a pdf of the map - this is the most typical use of map.
     """
     LOGGER.info('Testing printToPdf')
     myLayer, _ = loadLayer('test_shakeimpact.shp')
     myCanvasLayer = QgsMapCanvasLayer(myLayer)
     CANVAS.setLayerSet([myCanvasLayer])
     myRect = QgsRectangle(106.7894, -6.2308, 106.8004, -6.2264)
     CANVAS.setExtent(myRect)
     CANVAS.refresh()
     myMap = Map(IFACE)
     myMap.setImpactLayer(myLayer)
     myMap.composeMap()
     myPath = unique_filename(prefix='mapPdfTest',
                              suffix='.pdf',
                              dir=temp_dir('test'))
     myMap.printToPdf(myPath)
     LOGGER.debug(myPath)
     myMessage = 'Rendered output does not exist: %s' % myPath
     assert os.path.exists(myPath), myMessage
     # pdf rendering is non deterministic so we can't do a hash check
     # test_renderComposition renders just the image instead of pdf
     # so we hash check there and here we just do a basic minimum file
     # size check.
     mySize = os.stat(myPath).st_size
     myExpectedSize = 352798  # as rendered on linux ub 12.04 64
     myMessage = 'Expected rendered map pdf to be at least %s, got %s' % (
         myExpectedSize, mySize)
     assert mySize >= myExpectedSize, myMessage

 def test_getVectorLegend(self):
     """Getting a legend for a vector layer works."""
     myLayer, _ = loadLayer('test_shakeimpact.shp')
     myMapLegend = MapLegend(myLayer)
     myImage = myMapLegend.getVectorLegend()
     myPath = unique_filename(prefix='getVectorLegend',
                              suffix='.png',
                              dir=temp_dir('test'))
     myImage.save(myPath, 'PNG')
     LOGGER.debug(myPath)
     # As we have discovered, different versions of Qt and
     # OS platforms cause different output, so myControlImages is a list
     # of 'known good' renders.
     myControlImages = ['getVectorLegend.png',
                        'getVectorLegend-variantWindosVistaSP2-32.png',
                        'getVectorLegend-variantUB12.04-64.png',
                        'getVectorLegend-variantUB11.04-64.png',
                        'getVectorLegend-variantJenkins.png']
     myTolerance = 0  # to allow for version number changes in disclaimer
     myFlag, myMessage = checkImages(myControlImages,
                                 myPath,
                                 myTolerance)
     myMessage += ('\nWe want these images to match, if they do already '
             'copy the test image generated to create a new control image.')
     assert myFlag, myMessage

 def test_addClassToLegend(self):
     """Test we can add a class to the map legend."""
     myLayer, _ = loadLayer('test_shakeimpact.shp')
     myMapLegend = MapLegend(myLayer)
     myColour = QtGui.QColor(12, 34, 126)
     myMapLegend.addClassToLegend(myColour,
                            theMin=None,
                            theMax=None,
                            theCategory=None,
                            theLabel='bar')
     myMapLegend.addClassToLegend(myColour,
                            theMin=None,
                            theMax=None,
                            theCategory=None,
                            theLabel='foo')
     myPath = unique_filename(prefix='addClassToLegend',
                              suffix='.png',
                              dir=temp_dir('test'))
     myMapLegend.getLegend().save(myPath, 'PNG')
     LOGGER.debug(myPath)
     # As we have discovered, different versions of Qt and
     # OS platforms cause different output, so myControlImages is a list
     # of 'known good' renders.
     myControlImages = ['getClassToLegend.png',
                        'getClassToLegend-variantWindosVistaSP2-32.png',
                        'getClassToLegend-variantUB12.04-64.png',
                        'getClassToLegend-variantUB11.04-64.png',
                        'getClassToLegend-variantJenkins.png']
     myTolerance = 0  # to allow for version number changes in disclaimer
     myFlag, myMessage = checkImages(myControlImages,
                                     myPath,
                                     myTolerance)
     myMessage += ('\nWe want these images to match, if they do already '
             'copy the test image generated to create a new control image.')
     assert myFlag, myMessage

 def test_getVectorLegend(self):
     """Getting a legend for a vector layer works."""
     myLayer, _ = loadLayer('test_shakeimpact.shp')
     myMapLegend = MapLegend(
         myLayer,
         theLegendNotes='Thousand separator represented by \'.\'',
         theLegendUnits='(people per cell)')
     myImage = myMapLegend.getVectorLegend()
     myPath = unique_filename(prefix='getVectorLegend',
                              suffix='.png',
                              dir=temp_dir('test'))
     myImage.save(myPath, 'PNG')
     print myMapLegend.legendUnits
     print myMapLegend.legendNotes
     print myPath
     LOGGER.debug(myPath)
     # As we have discovered, different versions of Qt and
     # OS platforms cause different output, so myControlImages is a list
     # of 'known good' renders.
     myControlImages = ['getVectorLegend.png',
                        'getVectorLegend-variantWindowsVistaSP2-32.png',
                        'getVectorLegend-variantWindowsXPSP3-32.png',
                        'getVectorLegend-variantOSXml.png',
                        'getVectorLegend-variantUB12.04-64.png',
                        'getVectorLegend-variantUB11.04-64.png',
                        'getVectorLegend-variantLinuxMint-14-x86_64.png',
                        'getVectorLegend-variantWindows7-SP1-AMD64.png',
                        'getVectorLegend-variantJenkins.png']
     myTolerance = 0  # to allow for version number changes in disclaimer
     myFlag, myMessage = checkImages(myControlImages, myPath, myTolerance)
     myMessage += ('\nWe want these images to match, if they do already '
                   'copy the test image generated to create a new control '
                   'image.')
     assert myFlag, myMessage

 def test_getMapTitle(self):
     """Getting the map title from the keywords"""
     myLayer, _ = loadLayer('test_floodimpact.tif')
     myMap = Map(IFACE)
     myMap.setImpactLayer(myLayer)
     myTitle = myMap.getMapTitle()
     myExpectedTitle = 'Penduduk yang Mungkin dievakuasi'
     myMessage = 'Expected: %s\nGot:\n %s' % (myExpectedTitle, myTitle)
     assert myTitle == myExpectedTitle, myMessage

 def test_handleMissingMapTitle(self):
     """Missing map title from the keywords fails gracefully"""
     # TODO running OSM Buildngs with Pendudk Jakarta
     # wasthrowing an error when requesting map title
     # that this test wasnt replicating well
     myLayer, _ = loadLayer('population_padang_1.asc')
     myMap = Map(IFACE)
     myMap.setImpactLayer(myLayer)
     myTitle = myMap.getMapTitle()
     myExpectedTitle = None
     myMessage = 'Expected: %s\nGot:\n %s' % (myExpectedTitle, myTitle)
     assert myTitle == myExpectedTitle, myMessage

    def test_renderComposition(self):
        """Test making an image of the map only."""
        LOGGER.info('Testing renderComposition')
        myLayer, _ = loadLayer('test_shakeimpact.shp')
        myCanvasLayer = QgsMapCanvasLayer(myLayer)
        CANVAS.setLayerSet([myCanvasLayer])

        myRect = QgsRectangle(106.7894, -6.2308, 106.8004, -6.2264)
        CANVAS.setExtent(myRect)
        CANVAS.refresh()
        myMap = Map(IFACE)
        myMap.setImpactLayer(myLayer)
        myMap.composeMap()
        myImagePath, myControlImage, myTargetArea = myMap.renderComposition()
        LOGGER.debug(myImagePath)

        assert myControlImage is not None

        myDimensions = [myTargetArea.left(),
                        myTargetArea.top(),
                        myTargetArea.bottom(),
                        myTargetArea.right()]
        myExpectedDimensions = [0.0, 0.0, 3507.0, 2480.0]
        myMessage = 'Expected target area to be %s, got %s' % (
            str(myExpectedDimensions), str(myDimensions))
        assert myExpectedDimensions == myDimensions, myMessage

        myMessage = 'Rendered output does not exist'
        assert os.path.exists(myImagePath), myMessage

        myAcceptableImages = [
            'renderComposition.png',
            'renderComposition-variantUB12.04.png',
            'renderComposition-variantUB12.10.png',
            'renderComposition-variantOSXml.png',
            'renderComposition-variantWindowsVistaSP2-32.png',
            'renderComposition-variantJenkins.png',
            'renderComposition-variantUB11.10-64.png',
            'renderComposition-variantLinuxMint-14-x86_64.png',
            'renderComposition-variantWindows7-SP1-AMD64.png',
            'renderComposition-variantUB11.04-64.png']
        # Beta version and version changes  can introduce a few extra chars
        # into the metadata section so we set a reasonable tolerance to cope
        # with this.
        myTolerance = 8000
        print myImagePath
        print myAcceptableImages
        myFlag, myMessage = checkImages(myAcceptableImages,
                                        myImagePath,
                                        myTolerance)
        assert myFlag, myMessage