Support scs-level-4

db/tests/units/scs/test_scs_alias.py

@@ -1,7 +1,7 @@
 import unittest
 
 from sc.scs.parser import SCsParser
-from sc.scs.types import Arc, Edge, Element, Link, Node
+from sc.scs.types import *
 
 
 class TestSCsAlias(unittest.TestCase):

db/tests/units/scs/test_scs_level2.py

@@ -4,7 +4,7 @@
 from sc.scs.parser import SCsParser
 
 
-class TestSCsParserLevel2(unittest.TestCase):
+class TestSCsLevel2(unittest.TestCase):
 
     def test_reverse(self):
         parser = SCsParser()

db/tests/units/scs/test_scs_level3.py

@@ -4,7 +4,7 @@
 from sc.scs.parser import SCsParser
 
 
-class TestSCsParserLevel3(unittest.TestCase):
+class TestSCsLevel3(unittest.TestCase):
 
     def test_smoke(self):
         parser = SCsParser()

db/tests/units/scs/test_scs_level4.py

@@ -0,0 +1,55 @@
+import unittest
+
+from sc.scs.parser import SCsParser
+from sc.scs.types import *
+
+
+class TestSCsLevel4(unittest.TestCase):
+
+    def test_smoke(self):
+        parser = SCsParser()
+
+        self.assertTrue(parser.parse("a -> b: c; d;;"))
+        self.assertEqual(len(parser.triples), 4)
+
+        src, _, trg = parser.triples[0]
+        self.assertEqual(src.name, "a")
+        self.assertEqual(trg.name, "c")
+
+        src, _, trg = parser.triples[1]
+        self.assertEqual(src.name, "b")
+        self.assertIsInstance(trg, Arc)
+
+        src, _, trg = parser.triples[2]
+        self.assertEqual(src.name, "a")
+        self.assertEqual(trg.name, "d")
+
+        src, _, trg = parser.triples[3]
+        self.assertEqual(src.name, "b")
+        self.assertIsInstance(trg, Arc)
+
+    def test_complex(self):
+        parser = SCsParser()
+
+        self.assertTrue(parser.parse("a -> b: c; <- d: e: f;;"))
+        self.assertEqual(len(parser.triples), 5)
+
+        src, _, trg = parser.triples[0]
+        self.assertEqual(src.name, "a")
+        self.assertEqual(trg.name, "c")
+
+        src, _, trg = parser.triples[1]
+        self.assertEqual(src.name, "b")
+        self.assertIsInstance(trg, Arc)
+
+        src, _, trg = parser.triples[2]
+        self.assertEqual(src.name, "f")
+        self.assertEqual(trg.name, "a")
+
+        src, _, trg = parser.triples[3]
+        self.assertEqual(src.name, "d")
+        self.assertIsInstance(trg, Arc)
+
+        src, _, trg = parser.triples[4]
+        self.assertEqual(src.name, "e")
+        self.assertIsInstance(trg, Arc)