refactor(test): Move test_parse_expr_pass_0.py into test_treegen.py

(The _parse_expr_pass_0 method, after which it was named, doesn't even exist any more)

Author: MarcellPerger1

test/test_cstgen/.snapshots/test_parse_expr_pass_0.txt

@@ -1,7 +1,7 @@
 import unittest
 
 from parser.lexer.tokenizer import Tokenizer
-from parser.cst.treegen import TreeGen, LocatedCstError
+from parser.cst.treegen import TreeGen, LocatedCstError, CstGen
 from parser.common import StrRegion
 from test.common import CommonTestCase
 
@@ -94,5 +94,29 @@ def test_empty_sqb_error(self):
         self.assertEqual(4, exc.region.end - 1)
 
 
+class TestItemChain(CommonTestCase):
+    def test_getattr__issue_09(self):
+        t = Tokenizer('fn(call_arg).a;').tokenize()
+        node = CstGen(t).parse()
+        self.assertMatchesSnapshot(node, 'after_call')
+        t = Tokenizer('(paren + x).b;').tokenize()
+        node = CstGen(t).parse()
+        self.assertMatchesSnapshot(node, 'after_paren')
+        t = Tokenizer('"a string".b;').tokenize()
+        node = CstGen(t).parse()
+        self.assertMatchesSnapshot(node, 'after_string')
+
+    def test_getitem__issue_09(self):
+        t = Tokenizer('fn(call_arg)[1];').tokenize()
+        node = CstGen(t).parse()
+        self.assertMatchesSnapshot(node, 'after_call')
+        t = Tokenizer('(paren + x)[2];').tokenize()
+        node = CstGen(t).parse()
+        self.assertMatchesSnapshot(node, 'after_paren')
+        t = Tokenizer('"a string"["key_" .. 3];').tokenize()
+        node = CstGen(t).parse()
+        self.assertMatchesSnapshot(node, 'after_string')
+
+
 if __name__ == '__main__':
     unittest.main()