Add unit tests

Author: pblottiere

tests/src/python/test_provider_postgres.py

@@ -20,15 +20,26 @@
 
 from qgis.core import (
     QgsGeometry,
+    QgsProject,
     QgsPoint,
     QgsVectorLayer,
     QgsVectorLayerImport,
     QgsFeatureRequest,
+    QgsMapLayerRegistry,
     QgsFeature,
     QgsTransactionGroup,
     NULL
 )
+
+from qgis.gui import (
+    QgsEditorWidgetRegistry,
+    QgsAttributeForm
+)
+
 from qgis.PyQt.QtCore import QSettings, QDate, QTime, QDateTime, QVariant
+
+from qgis.PyQt.QtWidgets import QLabel
+
 from qgis.testing import start_app, unittest
 from utilities import unitTestDataPath
 from providertestbase import ProviderTestCase
@@ -54,6 +65,8 @@ def setUpClass(cls):
         cls.poly_provider = cls.poly_vl.dataProvider()
         cls.con = psycopg2.connect(cls.dbconn)
 
+        QgsEditorWidgetRegistry.initEditors()
+
     @classmethod
     def tearDownClass(cls):
         """Run after all tests"""
@@ -407,6 +420,48 @@ def testStyleDatabaseWithService(self):
         ids = styles[1]
         self.assertEqual(len(ids), 1)
 
+    def testTransactionConstrains(self):
+        # create a vector layer based on postgres
+        vl = QgsVectorLayer(self.dbconn + ' sslmode=disable key=\'id\' table="qgis_test"."check_constraints" sql=', 'test', 'postgres')
+        self.assertTrue(vl.isValid())
+
+        # prepare a project with transactions enabled
+        p = QgsProject.instance()
+        p.setAutoTransaction(True)
+
+        QgsMapLayerRegistry.instance().addMapLayers([vl])
+
+        # get feature
+        f = next(vl.getFeatures(QgsFeatureRequest(1)))  # fid=1
+        self.assertEqual(f.attributes(), [1, 4, 3])
+
+        # start edition
+        vl.startEditing()
+
+        # update attribute form with a failing constraints
+        # coming from the database if attributes are updated
+        # one at a time.
+        # Current feature: a = 4 / b = 3
+        # Update feature: a = 1 / b = 0
+        # If updated one at a time, '(a = 1) < (b = 3)' => FAIL!
+        form = QgsAttributeForm(vl)
+        form.setFeature(f)
+        self.assertTrue(form.editable())
+        for w in form.findChildren(QLabel):
+            if w.buddy():
+                spinBox = w.buddy()
+                if w.text() == 'a':
+                    spinBox.setValue('1')
+                if w.text() == 'b':
+                    spinBox.setValue('0')
+
+        # save
+        form.save()
+
+        # check new values
+        f = next(vl.getFeatures(QgsFeatureRequest(1)))  # fid=1
+        self.assertEqual(f.attributes(), [1, 1, 0])
+
 
 if __name__ == '__main__':
     unittest.main()

tests/testdata/provider/testdata_pg.sql

@@ -30,7 +30,7 @@ SET default_with_oids = false;
 
 --
 -- TOC entry 171 (class 1259 OID 377761)
--- Name: someData; Type: TABLE; Schema: qgis_test; Owner: postgres; Tablespace: 
+-- Name: someData; Type: TABLE; Schema: qgis_test; Owner: postgres; Tablespace:
 --
 
 CREATE TABLE qgis_test."someData" (
@@ -70,7 +70,7 @@ INSERT INTO qgis_test."some_poly_data" (pk, geom) VALUES
 
 --
 -- TOC entry 3953 (class 2606 OID 377768)
--- Name: someData_pkey; Type: CONSTRAINT; Schema: qgis_test; Owner: postgres; Tablespace: 
+-- Name: someData_pkey; Type: CONSTRAINT; Schema: qgis_test; Owner: postgres; Tablespace:
 --
 
 ALTER TABLE ONLY qgis_test."someData"
@@ -399,6 +399,16 @@ CREATE TABLE qgis_test.domains
   fld_numeric_domain qgis_test.numeric_domain
 );
 
+CREATE TABLE qgis_test.check_constraints (
+  id integer PRIMARY KEY,
+  a integer,
+  b integer, CHECK (a > b)
+);
+INSERT INTO qgis_test.check_constraints VALUES (
+  1, -- id
+  4, -- a
+  3  -- b
+);
 
 --------------------------------------
 -- Temporary table for testing renaming fields