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

Authored by: bashonly
2026-09-06 00:41:58 +00:00 · 2026-02-17 23:46:20 +00:00
parent c9c8651975
commit d108ca10b9
2 changed files with 12 additions and 0 deletions
@@ -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])