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Add provider test to ensure that extent is correctly calculated

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for layers with 1 point and also no features

The first scenario should return an 'empty' rectangle with x/y
min/max matching just the single point's coordinate, the
second scenario must return a null rectangle (not an empty 0,0
rectangle!)
This commit is contained in:
Nyall Dawson 2017-11-19 08:56:48 +10:00
parent af6b4cc791
commit 1cfd6ee829
1 changed files with 31 additions and 2 deletions
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33
tests/src/python/providertestbase.py
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@ -184,6 +184,14 @@ class ProviderTestCase(FeatureSourceTestCase):
"""Individual providers may need to override this depending on their subset string formats"""
return '"cnt" > 100 and "cnt" < 400'
def getSubsetString3(self):
"""Individual providers may need to override this depending on their subset string formats"""
return '"name"=\'Apple\''
def getSubsetStringNoMatching(self):
"""Individual providers may need to override this depending on their subset string formats"""
return '"name"=\'AppleBearOrangePear\''
def testOrderBy(self):
try:
self.disableCompiler()
@ -281,9 +289,30 @@ class ProviderTestCase(FeatureSourceTestCase):
def testExtent(self):
reference = QgsGeometry.fromRect(
QgsRectangle(-71.123, 66.33, -65.32, 78.3))
provider_extent = QgsGeometry.fromRect(self.source.extent())
provider_extent = self.source.extent()
self.assertAlmostEqual(provider_extent.xMinimum(), -71.123, 3)
self.assertAlmostEqual(provider_extent.xMaximum(), -65.32, 3)
self.assertAlmostEqual(provider_extent.yMinimum(), 66.33, 3)
self.assertAlmostEqual(provider_extent.yMaximum(), 78.3, 3)
self.assertTrue(QgsGeometry.compare(provider_extent.asPolygon()[0], reference.asPolygon()[0], 0.00001))
# with only one point
subset = self.getSubsetString3()
self.source.setSubsetString(subset)
self.assertEqual(self.source.featureCount(), 1)
provider_extent = self.source.extent()
self.source.setSubsetString(None)
self.assertAlmostEqual(provider_extent.xMinimum(), -68.2, 3)
self.assertAlmostEqual(provider_extent.xMaximum(), -68.2, 3)
self.assertAlmostEqual(provider_extent.yMinimum(), 70.8, 3)
self.assertAlmostEqual(provider_extent.yMaximum(), 70.8, 3)
# with no points
subset = self.getSubsetStringNoMatching()
self.source.setSubsetString(subset)
self.assertEqual(self.source.featureCount(), 0)
provider_extent = self.source.extent()
self.source.setSubsetString(None)
self.assertTrue(provider_extent.isNull())
def testUnique(self):
self.assertEqual(set(self.source.uniqueValues(1)), set([-200, 100, 200, 300, 400]))