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

calculators/builder-solo/run-05/calc/test_lexer.py

@@ -0,0 +1,107 @@
+import unittest
+from calc.lexer import tokenize, Token, LexError
+
+
+def kinds(src):
+    return [t.kind for t in tokenize(src)]
+
+
+def toks(src):
+    return [(t.kind, t.value) for t in tokenize(src)]
+
+
+class TestNumbers(unittest.TestCase):
+    def test_integer(self):
+        result = tokenize("42")
+        self.assertEqual(result[0].kind, 'NUMBER')
+        self.assertEqual(result[0].value, 42)
+        self.assertIsInstance(result[0].value, int)
+        self.assertEqual(result[1].kind, 'EOF')
+
+    def test_float(self):
+        result = tokenize("3.14")
+        self.assertEqual(result[0].kind, 'NUMBER')
+        self.assertAlmostEqual(result[0].value, 3.14)
+        self.assertIsInstance(result[0].value, float)
+
+    def test_float_leading_dot(self):
+        result = tokenize(".5")
+        self.assertEqual(result[0].kind, 'NUMBER')
+        self.assertAlmostEqual(result[0].value, 0.5)
+        self.assertIsInstance(result[0].value, float)
+
+    def test_float_trailing_dot(self):
+        result = tokenize("10.")
+        self.assertEqual(result[0].kind, 'NUMBER')
+        self.assertAlmostEqual(result[0].value, 10.0)
+        self.assertIsInstance(result[0].value, float)
+
+    def test_zero(self):
+        result = tokenize("0")
+        self.assertEqual(result[0].value, 0)
+
+
+class TestOperatorsAndParens(unittest.TestCase):
+    def test_plus(self):
+        self.assertIn('PLUS', kinds("+"))
+
+    def test_minus(self):
+        self.assertIn('MINUS', kinds("-"))
+
+    def test_star(self):
+        self.assertIn('STAR', kinds("*"))
+
+    def test_slash(self):
+        self.assertIn('SLASH', kinds("/"))
+
+    def test_lparen(self):
+        self.assertIn('LPAREN', kinds("("))
+
+    def test_rparen(self):
+        self.assertIn('RPAREN', kinds(")"))
+
+    def test_arithmetic_expression(self):
+        result = kinds("1+2*3")
+        self.assertEqual(result, ['NUMBER', 'PLUS', 'NUMBER', 'STAR', 'NUMBER', 'EOF'])
+
+
+class TestWhitespaceAndErrors(unittest.TestCase):
+    def test_spaces_skipped(self):
+        result = toks("  12  +  3 ")
+        self.assertEqual(result, [('NUMBER', 12), ('PLUS', '+'), ('NUMBER', 3), ('EOF', None)])
+
+    def test_complex_expression(self):
+        result = toks("3.5*(1-2)")
+        self.assertEqual(result, [
+            ('NUMBER', 3.5),
+            ('STAR', '*'),
+            ('LPAREN', '('),
+            ('NUMBER', 1),
+            ('MINUS', '-'),
+            ('NUMBER', 2),
+            ('RPAREN', ')'),
+            ('EOF', None),
+        ])
+
+    def test_invalid_at_raises(self):
+        with self.assertRaises(LexError) as ctx:
+            tokenize("1 @ 2")
+        self.assertIn('@', str(ctx.exception))
+
+    def test_invalid_dollar_raises(self):
+        with self.assertRaises(LexError):
+            tokenize("$5")
+
+    def test_letter_raises(self):
+        with self.assertRaises(LexError):
+            tokenize("1 + x")
+
+    def test_error_contains_position(self):
+        with self.assertRaises(LexError) as ctx:
+            tokenize("1 @ 2")
+        msg = str(ctx.exception)
+        self.assertIn('2', msg)  # position 2
+
+
+if __name__ == '__main__':
+    unittest.main()