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[jsinterp] Fix and improve arithmetic operations

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* addition becomes concat with a string operand
* improve handling of edgier cases
* arithmetic in float like JS (more places need cast to int?)
* increase test coverage
This commit is contained in:
dirkf 2024-12-12 00:26:00 +00:00
parent 81e64cacf2
commit 5dee6213ed
2 changed files with 54 additions and 19 deletions
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20
test/test_jsinterp.py
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@ -41,16 +41,27 @@ class TestJSInterpreter(unittest.TestCase):
self._test('function f(){return 42 + 7;}', 49)
self._test('function f(){return 42 + undefined;}', NaN)
self._test('function f(){return 42 + null;}', 42)
self._test('function f(){return 1 + "";}', '1')
self._test('function f(){return 42 + "7";}', '427')
self._test('function f(){return false + true;}', 1)
self._test('function f(){return "false" + true;}', 'falsetrue')
self._test('function f(){return '
'1 + "2" + [3,4] + {k: 56} + null + undefined + Infinity;}',
'123,4[object Object]nullundefinedInfinity')
def test_sub(self):
self._test('function f(){return 42 - 7;}', 35)
self._test('function f(){return 42 - undefined;}', NaN)
self._test('function f(){return 42 - null;}', 42)
self._test('function f(){return 42 - "7";}', 35)
self._test('function f(){return 42 - "spam";}', NaN)
def test_mul(self):
self._test('function f(){return 42 * 7;}', 294)
self._test('function f(){return 42 * undefined;}', NaN)
self._test('function f(){return 42 * null;}', 0)
self._test('function f(){return 42 * "7";}', 294)
self._test('function f(){return 42 * "eggs";}', NaN)
def test_div(self):
jsi = JSInterpreter('function f(a, b){return a / b;}')
@ -58,17 +69,26 @@ class TestJSInterpreter(unittest.TestCase):
self._test(jsi, NaN, args=(JS_Undefined, 1))
self._test(jsi, float('inf'), args=(2, 0))
self._test(jsi, 0, args=(0, 3))
self._test(jsi, 6, args=(42, 7))
self._test(jsi, 0, args=(42, float('inf')))
self._test(jsi, 6, args=("42", 7))
self._test(jsi, NaN, args=("spam", 7))
def test_mod(self):
self._test('function f(){return 42 % 7;}', 0)
self._test('function f(){return 42 % 0;}', NaN)
self._test('function f(){return 42 % undefined;}', NaN)
self._test('function f(){return 42 % "7";}', 0)
self._test('function f(){return 42 % "beans";}', NaN)
def test_exp(self):
self._test('function f(){return 42 ** 2;}', 1764)
self._test('function f(){return 42 ** undefined;}', NaN)
self._test('function f(){return 42 ** null;}', 1)
self._test('function f(){return undefined ** 0;}', 1)
self._test('function f(){return undefined ** 42;}', NaN)
self._test('function f(){return 42 ** "2";}', 1764)
self._test('function f(){return 42 ** "spam";}', NaN)
def test_calc(self):
self._test('function f(a){return 2*a+1;}', 7, args=[3])