Add test for postgres boolean

tests/src/python/test_provider_postgres.py

@@ -132,6 +132,21 @@ class TestPyQgsPostgresProvider(unittest.TestCase, ProviderTestCase):
         self.assertIsInstance(f.attributes()[datetime_idx], QDateTime)
         self.assertEqual(f.attributes()[datetime_idx], QDateTime(QDate(2004, 3, 4), QTime(13, 41, 52)))
 
+    def testBooleanType(self):
+        vl = QgsVectorLayer('{} table="qgis_test"."boolean_table" sql='.format(self.dbconn), "testbool", "postgres")
+        self.assertTrue(vl.isValid())
+
+        fields = vl.dataProvider().fields()
+        self.assertEqual(fields.at(fields.indexFromName('fld1')).type(), QVariant.Bool)
+
+        values = {feat['id']: feat['fld1'] for feat in vl.getFeatures()}
+        expected = {
+            1: True,
+            2: False,
+            3: NULL
+        }
+        self.assertEqual(values, expected)
+
     def testQueryLayers(self):
         def test_query(dbconn, query, key):
             ql = QgsVectorLayer('%s srid=4326 table="%s" (geom) key=\'%s\' sql=' % (dbconn, query.replace('"', '\\"'), key), "testgeom", "postgres")

tests/testdata/provider/testdata_pg.sql

@@ -459,6 +459,20 @@ CREATE TABLE qgis_test.widget_styles(
 INSERT INTO qgis_editor_widget_styles VALUES
 ('qgis_test', 'widget_styles', 'fld1', 'FooEdit', '<config type="Map"><Option name="param1" value="value1" type="QString"/><Option name="param2" value="2" type="QString"/></config>');
 
+--------------------------------------
+-- Table for boolean
+--
+
+CREATE TABLE qgis_test.boolean_table
+(
+  id int PRIMARY KEY,
+  fld1 BOOLEAN
+);
+
+INSERT INTO qgis_test.boolean_table VALUES
+(1, TRUE),
+(2, FALSE),
+(3, NULL);
 
 -----------------------------
 -- Table for constraint tests