v.out.ogr: Add basic unit tests (OSGeo#3848)

Add basic tests for GeoPackage and Shapefile export which use import to test the result (so they test round trip but focus on the export).

vector/v.out.ogr/testsuite/test_v_out_ogr.py

@@ -0,0 +1,115 @@
+"""Test of v.out.ogr
+
+@author Luís Moreira de Sousa
+"""
+
+from pathlib import Path
+from grass.gunittest.case import TestCase
+
+
+class TestOgrExport(TestCase):
+
+    # Vector map in NC test dataset
+    test_map = "boundary_county"
+
+    # Result of import tests
+    temp_import = "test_ogr_import_map"
+
+    # Column on which to test v.univar
+    univar_col = "PERIMETER"
+
+    # Output of v.univar
+    univar_string = """n=926
+nmissing=0
+nnull=0
+min=9.64452
+max=3.70609e+06
+range=3.70608e+06
+sum=1.1223e+08
+mean=121199
+mean_abs=121199
+population_stddev=342855
+population_variance=1.17549e+11
+population_coeff_variation=2.82886
+sample_stddev=343040
+sample_variance=1.17676e+11
+kurtosis=33.681
+skewness=4.86561
+"""
+
+    @classmethod
+    def setUpClass(cls):
+        """Use temporary region settings"""
+        cls.use_temp_region()
+
+    @classmethod
+    def tearDownClass(cls):
+        """Remove the temporary region"""
+        cls.del_temp_region()
+
+    def tearDown(self):
+        self.runModule(
+            "g.remove", type="vector", flags="f", pattern=f"{self.temp_import}*"
+        )
+        for p in Path().glob(f"{self.test_map}*"):
+            p.unlink()
+
+    def test_gpkg_format(self):
+        """Tests output to GeoPackage format"""
+
+        self.assertModule(
+            "v.out.ogr",
+            "Export to GeoPackage Format",
+            input=self.test_map,
+            output=f"{self.test_map}.gpkg",
+            format="GPKG",
+        )
+
+        # Import back to verify
+        self.runModule(
+            "v.in.ogr",
+            input=f"{self.test_map}.gpkg",
+            output=self.temp_import,
+        )
+
+        self.runModule("g.region", vector=self.temp_import)
+
+        self.assertVectorFitsUnivar(
+            map=self.temp_import,
+            reference=self.univar_string,
+            column=self.univar_col,
+            precision=1e-8,
+        )
+
+    def test_shp_format(self):
+        """Tests output to Shapefile format"""
+
+        self.assertModule(
+            "v.out.ogr",
+            "Export to Shapefile Format",
+            input=self.test_map,
+            output=f"{self.test_map}.shp",
+            format="ESRI_Shapefile",
+        )
+
+        # Import back to verify
+        self.runModule(
+            "v.in.ogr",
+            input=f"{self.test_map}.shp",
+            output=self.temp_import,
+        )
+
+        self.runModule("g.region", vector=self.temp_import)
+
+        self.assertVectorFitsUnivar(
+            map=self.temp_import,
+            reference=self.univar_string,
+            column=self.univar_col,
+            precision=1e-8,
+        )
+
+
+if __name__ == "__main__":
+    from grass.gunittest.main import test
+
+    test()