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[jsinterp] Support string concatenation with + and += (#15990)

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Authored by: bashonly
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bashonly 2026-02-17 17:46:20 -06:00 • committed by GitHub
commit d108ca10b9
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test/test_jsinterp.py
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@ -109,6 +109,14 @@ class TestJSInterpreter(unittest.TestCase):
self._test('function f(){return -12616 ^ 5041}', -8951)
self._test('function f(){return 21 << 4294967297}', 42)
def test_string_concat(self):
self._test('function f(){return "a" + "b";}', 'ab')
self._test('function f(){let x = "a"; x += "b"; return x;}', 'ab')
self._test('function f(){return "a" + 1;}', 'a1')
self._test('function f(){let x = "a"; x += 1; return x;}', 'a1')
self._test('function f(){return 2 + "b";}', '2b')
self._test('function f(){let x = 2; x += "b"; return x;}', '2b')
def test_array_access(self):
self._test('function f(){var x = [1,2,3]; x[0] = 4; x[0] = 5; x[2.0] = 7; return x;}', [5, 2, 7])