feat(diceparser): Added sqrt operator.

roll/diceparser.py

@@ -25,7 +25,7 @@
 Website used to do railroad diagrams: https://www.bottlecaps.de/rr/ui
 """
 
-from math import ceil, e, factorial, pi
+from math import ceil, e, factorial, pi, sqrt
 from operator import add, floordiv, mod, mul, sub, truediv
 from random import randint
 from sys import version_info
@@ -115,7 +115,8 @@ class DiceParser:
         "^": pow,
         "**": pow,
         "d": _roll_dice,
-        "!": factorial
+        "!": factorial,
+        "sqrt": sqrt
     }
 
     constants = {
@@ -138,6 +139,8 @@ def _create_parser() -> Forward:
         )
 
         expression = operatorPrecedence(atom, [
+            (Literal('-'), 1, opAssoc.RIGHT),
+            (CaselessLiteral('sqrt'), 1, opAssoc.RIGHT),
             (oneOf('^ **'), 2, opAssoc.RIGHT),
 
             (Literal('-'), 1, opAssoc.RIGHT),
@@ -212,6 +215,8 @@ def evaluate(
 
                         result = current_rolls['total']
                         dice_rolls.append(current_rolls)
+                    elif operator is sqrt:
+                        result = operator(val)
                     else:
                         result = operator(result, val)
                 else:

roll/roll.py

@@ -23,7 +23,7 @@
 def roll(expression: str = '',
          verbose: bool = False) -> Union[int, float, dp.EvaluationResults]:
     """Evalute a string for dice and mathematical operations and calculate."""
-    bad_chars: str = "0123456789d-/*() %+.!^pie"
+    bad_chars: str = "0123456789d-/*() %+.!^piesqrt"
     input_had_bad_chars: bool = len(expression.strip(bad_chars)) > 0
 
     if input_had_bad_chars:

tests/test_basic_math.py

@@ -1,89 +1,61 @@
 
-from math import e, pi
+from math import e, pi, sqrt
+from typing import Union
 
 import pytest
 from roll import roll
 
 
-def test_addition1():
-    assert roll('2 + 2') == 4
-
-
-def test_addition2():
-    assert roll('10 + 52') == 62
-
-
-def test_addition3():
-    assert roll('1 + 10 + 100 + 1000') == 1111
-
-
-def test_addition_without_spaces1():
-    assert roll('8+16') == 24
-
-
-def test_addition_without_spaces2():
-    assert roll('5+17+202+81') == 305
-
-
-def test_addition_with_uneven_spaces1():
-    assert roll('19     +    57') == 76
+@pytest.mark.parametrize("equation,result", [
+    ('2 + 2', 4),
+    ('10 + 52', 62),
+    ('1 + 10 + 100 + 1000', 1111),
+    ('8 + 16', 24),
+    ('5 + 17 + 202 + 81', 305),
+    ('19 + 57', 76),
+    ('-5 + 20', 15),
+    ('50 + -25', 25),
+    ('1.5 + 0.5', 2),
+    ('204.5 + 20', 224.5),
+])
+def test_addition(equation: str, result: Union[int, float]):
+    assert roll(equation) == result
 
 
 def test_addition_with_uneven_spaces2():
     with pytest.raises(Exception):
         roll('321\t\n  + \t\t\t   \t 18')
 
 
-def test_subtraction1():
-    assert roll('10 - 5') == 5
-
-
-def test_subtraction2():
-    assert roll('100 - 52') == 48
-
-
-def test_subtraction3():
-    assert roll('1111 - 100 - 10 - 1') == 1000
-
-
-def test_subtraction4():
-    assert roll('73 - 100') == -27
-
-
-def test_subtraction5():
-    assert roll('5 - -10') == 15
-
-
-def test_multiplication1():
-    assert roll('2 * 2') == 4
-
-
-def test_multiplication2():
-    assert roll('20 * 5') == 100
-
-
-def test_multiplication3():
-    assert roll('1 * 10 * 100') == 1000
-
-
-def test_multiplication4():
-    assert roll('6 * 8 * 2 * 10') == 960
-
-
-def test_division1():
-    assert roll('5 / 5') == 1
-
-
-def test_division2():
-    assert roll('15 / 3') == 5
+@pytest.mark.parametrize("equation,result", [
+    ('10 - 5', 5),
+    ('100 - 52', 48),
+    ('1111 - 100 - 10 - 1', 1000),
+    ('73 - 100', -27),
+    ('5 - -10', 15),
+])
+def test_subtraction(equation: str, result: Union[int, float]):
+    assert roll(equation) == result
 
 
-def test_division3():
-    assert roll('48 / 6') == 8
+@pytest.mark.parametrize("equation,result", [
+    ('2 * 2', 4),
+    ('20 * 5', 100),
+    ('1 * 10 * 100', 1000),
+    ('6 * 8 * 2 * 10', 960),
+])
+def test_multiplication(equation: str, result: Union[int, float]):
+    assert roll(equation) == result
 
 
-def test_division4():
-    assert roll('54 / 9') == 6
+@pytest.mark.parametrize("equation,result", [
+    ('5 / 5', 1),
+    ('15 / 3', 5),
+    ('48 / 6', 8),
+    ('54 / 9', 6),
+])
+def test_division(equation: str, result: Union[int, float]):
+    assert roll(equation) == result
 
 
 def test_add_mul():
@@ -176,8 +148,38 @@ def test_bad_parens2():
 def test_add_explonential():
     assert roll("3 + 7**3") == 346
 
-def test_pi():
-    assert roll('pi') == pi
 
-def test_e():
-    assert roll('e') == e
+@pytest.mark.parametrize("equation,result", [
+    ('pi', pi),
+    ('e', e),
+])
+def test_constants(equation: str, result: Union[int, float]):
+    assert roll(equation) == result
+
+
+@pytest.mark.parametrize("equation,result", [
+    ('sqrt 25', 5),
+    # Addition
+    ('2 + sqrt 9', 5),
+    ('sqrt 36 + 7', 13),
+    # Subtraction
+    ('sqrt 16 - 4', 0),
+    ('20 - sqrt 100', 10),
+    # Multiplication
+    ('sqrt 4 * 12', 24),
+    ('10 * sqrt 81', 90),
+    # Division
+    ('sqrt 25 / 5', 1),
+    ('60 / sqrt 36', 10),
+    # Unary minus
+    ('sqrt --16', 4),
+    ('- sqrt 49', -7),
+    # Constants
+    ('sqrt e', sqrt(e)),
+    ('sqrt pi', sqrt(pi)),
+    # Exponentiation
+    ('sqrt 169 ** 2', 169),
+    ('5 ** sqrt 9', 125),
+])
+def test_sqrt(equation: str, result: Union[int, float]):
+    assert roll(equation) == result

tests/test_dice_rolling_with_math.py

@@ -1,4 +1,5 @@
 
+import pytest
 from roll import roll
 
 
@@ -32,3 +33,11 @@ def test_dice_expo():
 
 def test_dice_expo1():
     assert roll('5d1**5') == 5
+
+
+@pytest.mark.parametrize("equation,range_low,range_high", [
+    ('sqrt 25 d 6', 5, 30),
+    ('1d sqrt 36', 1, 6),
+])
+def test_dice_sqrt(equation: str, range_low: int, range_high: int):
+    assert roll(equation) in range(range_low, range_high + 1)