v.build: added tests for v.build module

vector/v.build/testsuite/test_v_build.py

@@ -0,0 +1,85 @@
+import grass.script as gs
+from grass.gunittest.case import TestCase
+from grass.gunittest.main import test
+
+
+class TestVBuild(TestCase):
+    """Test v.build output against expected output stored in vbuild_output"""
+
+    @classmethod
+    def setUpClass(cls):
+        """Set up a temporary region and create vector map with test features."""
+        cls.use_temp_region()
+        input_data = "P 1\n1 1\nL 2\n0.5 0.5\n2.5 2.5"
+        gs.write_command(
+            "v.in.ascii",
+            input="-",
+            format="standard",
+            stdin=input_data,
+            output="test_3x3_map",
+            flags="n",
+            overwrite=True,
+        )
+
+        # Run v.build (with multiple dump options) and store its output in a class variable.
+        cls.build_module = gs.read_command(
+            "v.build",
+            map="test_3x3_map",
+            option="build,dump,sdump,cdump,fdump",
+            quiet=True,
+        ).strip()
+
+        # Read the expected output.
+        cls.vbuild_output = """
+N,S,E,W,T,B: 2.500000, 0.500000, 2.500000, 0.500000, 0.000000, 0.000000
+-----------------------------------
+Nodes (2 nodes, alive + dead):
+node = 1, n_lines = 1, xyz = 0.500000, 0.500000, 0.000000
+  line =   2, type = 2, angle = 0.785398 (45.0000)
+node = 2, n_lines = 1, xyz = 2.500000, 2.500000, 0.000000
+  line =  -2, type = 2, angle = -2.356194 (225.0000)
+-----------------------------------
+Lines (2 lines, alive + dead):
+line = 1, type = 1, offset = 18
+line = 2, type = 2, offset = 35, n1 = 1, n2 = 2
+-----------------------------------
+Areas (0 areas, alive + dead):
+-----------------------------------
+Islands (0 islands, alive + dead):
+---------- SPATIAL INDEX DUMP ----------
+Nodes
+Node level=0  count=2
+  Branch 0  id = 1  0.500000 0.500000 0.000000 0.500000 0.500000 0.000000
+  Branch 1  id = 2  2.500000 2.500000 0.000000 2.500000 2.500000 0.000000
+Lines
+Node level=0  count=2
+  Branch 0  id = 1  1.000000 1.000000 0.000000 1.000000 1.000000 0.000000
+  Branch 1  id = 2  0.500000 0.500000 0.000000 2.500000 2.500000 0.000000
+Areas
+Node level=0  count=0
+Isles
+Node level=0  count=0
+---------- CATEGORY INDEX DUMP: Number of layers: 1 --------------------------------------
+Layer      0  number of unique cats:       1  number of cats:       2  number of types: 2
+------------------------------------------------------------------------------------------
+            type |     count
+               1 |         1
+               2 |         1
+ category | type | line/area
+        0 |    1 |         1
+        0 |    2 |         2
+------------------------------------------------------------------------------------------"""
+
+    @classmethod
+    def tearDownClass(cls):
+        """Remove created vector map and temporary files, then delete the temp region."""
+        gs.run_command("g.remove", type="vector", flags="f", name="test_3x3_map")
+        cls.del_temp_region()
+
+    def test_vbuild_output(self):
+        """Compare the v.build output (build_module) to the expected output."""
+        self.assertMultiLineEqual(self.build_module[135:], self.vbuild_output)
+
+
+if __name__ == "__main__":
+    test()