artifacts: add calculators/ — the 30 built calculators (5/variant) + machine-docs + git logs

calculators/builder-adversary-min/run-01/calc/test_parser.py

@@ -0,0 +1,93 @@
+import unittest
+from calc.lexer import tokenize
+from calc.parser import parse, ParseError, Num, BinOp, Unary
+
+
+def p(src):
+    return parse(tokenize(src))
+
+
+class TestPrecedence(unittest.TestCase):
+    """D1 — * and / bind tighter than + and -."""
+
+    def test_mul_over_add(self):
+        self.assertEqual(p('1+2*3'), BinOp('+', Num(1), BinOp('*', Num(2), Num(3))))
+
+    def test_mul_over_sub(self):
+        self.assertEqual(p('1-2*3'), BinOp('-', Num(1), BinOp('*', Num(2), Num(3))))
+
+    def test_div_over_add(self):
+        self.assertEqual(p('4+6/2'), BinOp('+', Num(4), BinOp('/', Num(6), Num(2))))
+
+
+class TestLeftAssociativity(unittest.TestCase):
+    """D2 — same-precedence operators associate left."""
+
+    def test_sub_left(self):
+        self.assertEqual(p('8-3-2'), BinOp('-', BinOp('-', Num(8), Num(3)), Num(2)))
+
+    def test_div_left(self):
+        self.assertEqual(p('8/4/2'), BinOp('/', BinOp('/', Num(8), Num(4)), Num(2)))
+
+    def test_add_left(self):
+        self.assertEqual(p('1+2+3'), BinOp('+', BinOp('+', Num(1), Num(2)), Num(3)))
+
+    def test_mul_left(self):
+        self.assertEqual(p('2*3*4'), BinOp('*', BinOp('*', Num(2), Num(3)), Num(4)))
+
+
+class TestParentheses(unittest.TestCase):
+    """D3 — parens override precedence."""
+
+    def test_paren_overrides_precedence(self):
+        self.assertEqual(p('(1+2)*3'), BinOp('*', BinOp('+', Num(1), Num(2)), Num(3)))
+
+    def test_nested_parens(self):
+        self.assertEqual(p('((2+3))*4'), BinOp('*', BinOp('+', Num(2), Num(3)), Num(4)))
+
+    def test_paren_right_side(self):
+        self.assertEqual(p('3*(1+2)'), BinOp('*', Num(3), BinOp('+', Num(1), Num(2))))
+
+
+class TestUnaryMinus(unittest.TestCase):
+    """D4 — leading and nested unary minus."""
+
+    def test_unary_literal(self):
+        self.assertEqual(p('-5'), Unary('-', Num(5)))
+
+    def test_unary_paren(self):
+        self.assertEqual(p('-(1+2)'), Unary('-', BinOp('+', Num(1), Num(2))))
+
+    def test_unary_in_mul(self):
+        self.assertEqual(p('3 * -2'), BinOp('*', Num(3), Unary('-', Num(2))))
+
+    def test_double_unary(self):
+        self.assertEqual(p('--5'), Unary('-', Unary('-', Num(5))))
+
+
+class TestErrors(unittest.TestCase):
+    """D5 — malformed input raises ParseError."""
+
+    def test_trailing_op(self):
+        with self.assertRaises(ParseError):
+            p('1 +')
+
+    def test_unclosed_paren(self):
+        with self.assertRaises(ParseError):
+            p('(1')
+
+    def test_consecutive_numbers(self):
+        with self.assertRaises(ParseError):
+            p('1 2')
+
+    def test_close_before_open(self):
+        with self.assertRaises(ParseError):
+            p(')(')
+
+    def test_empty(self):
+        with self.assertRaises(ParseError):
+            p('')
+
+
+if __name__ == '__main__':
+    unittest.main()