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

calculators/builder-solo/run-01/calc/test_lexer.py

@@ -0,0 +1,91 @@
+import unittest
+from calc.lexer import tokenize, Token, LexError
+
+
+def kinds(src):
+    return [t.kind for t in tokenize(src)]
+
+
+def pairs(src):
+    return [(t.kind, t.value) for t in tokenize(src)]
+
+
+class TestNumbers(unittest.TestCase):
+    def test_integer(self):
+        toks = tokenize("42")
+        self.assertEqual(len(toks), 2)
+        self.assertEqual(toks[0].kind, 'NUMBER')
+        self.assertEqual(toks[0].value, 42)
+        self.assertIsInstance(toks[0].value, int)
+        self.assertEqual(toks[1].kind, 'EOF')
+
+    def test_float(self):
+        t = tokenize("3.14")[0]
+        self.assertEqual(t.kind, 'NUMBER')
+        self.assertAlmostEqual(t.value, 3.14)
+        self.assertIsInstance(t.value, float)
+
+    def test_float_leading_dot(self):
+        t = tokenize(".5")[0]
+        self.assertEqual(t.kind, 'NUMBER')
+        self.assertAlmostEqual(t.value, 0.5)
+
+    def test_float_trailing_dot(self):
+        t = tokenize("10.")[0]
+        self.assertEqual(t.kind, 'NUMBER')
+        self.assertAlmostEqual(t.value, 10.0)
+        self.assertIsInstance(t.value, float)
+
+
+class TestOperatorsAndParens(unittest.TestCase):
+    def test_single_ops(self):
+        for ch, kind in [('+', 'PLUS'), ('-', 'MINUS'), ('*', 'STAR'), ('/', 'SLASH'),
+                         ('(', 'LPAREN'), (')', 'RPAREN')]:
+            with self.subTest(ch=ch):
+                toks = tokenize(ch)
+                self.assertEqual(toks[0].kind, kind)
+                self.assertEqual(toks[1].kind, 'EOF')
+
+    def test_expression(self):
+        self.assertEqual(kinds("1+2*3"),
+                         ['NUMBER', 'PLUS', 'NUMBER', 'STAR', 'NUMBER', 'EOF'])
+
+    def test_complex_expression(self):
+        self.assertEqual(kinds("3.5*(1-2)"),
+                         ['NUMBER', 'STAR', 'LPAREN', 'NUMBER', 'MINUS', 'NUMBER', 'RPAREN', 'EOF'])
+
+
+class TestWhitespaceAndErrors(unittest.TestCase):
+    def test_whitespace(self):
+        toks = tokenize("  12  +  3 ")
+        self.assertEqual(kinds("  12  +  3 "), ['NUMBER', 'PLUS', 'NUMBER', 'EOF'])
+        self.assertEqual(toks[0].value, 12)
+        self.assertEqual(toks[2].value, 3)
+
+    def test_tabs(self):
+        self.assertEqual(kinds("1\t+\t2"), ['NUMBER', 'PLUS', 'NUMBER', 'EOF'])
+
+    def test_invalid_at(self):
+        with self.assertRaises(LexError) as ctx:
+            tokenize("1 @ 2")
+        self.assertIn('@', str(ctx.exception))
+
+    def test_invalid_letter(self):
+        with self.assertRaises(LexError):
+            tokenize("abc")
+
+    def test_invalid_dollar(self):
+        with self.assertRaises(LexError):
+            tokenize("$")
+
+    def test_position_in_message(self):
+        try:
+            tokenize("1 @ 2")
+        except LexError as e:
+            msg = str(e)
+            self.assertIn('@', msg)
+            self.assertIn('2', msg)
+
+
+if __name__ == '__main__':
+    unittest.main()