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[js-api] Add test case for externref global #1983

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Merged
Ms2ger merged 4 commits into from
Jan 5, 2026
Merged

[js-api] Add test case for externref global #1983

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c857e83
[js-api] Add test case for externref global
Liedtke Sep 23, 2025
d82c98b
Only test the constructor
Liedtke Oct 20, 2025
4cb2ba5
Add test case for value assignment and valueOf()
Liedtke Oct 20, 2025
76ac446
remove Object.is again
Liedtke Oct 20, 2025
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26 changes: 25 additions & 1 deletion test/js-api/global/constructor.any.js
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Original file line number Diff line number Diff line change
Expand Up @@ -167,5 +167,29 @@ test(() => {

test(() => {
const argument = { "value": "v128" };
assert_throws_js(TypeError, () =>new WebAssembly.Global(argument));
assert_throws_js(TypeError, () => new WebAssembly.Global(argument));
}, "Construct v128 global");

test(() => {
for (let value of [
undefined,
null,
true,
1,
-0,
1.5,
-2n,
Symbol("test"),
"string",
{"an": "object"},
() => null
]) {
let global = new WebAssembly.Global({value: "externref"}, value);
assert_Global(global, value);
}
}, "externref global");
Comment on lines +185 to +190
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@Ms2ger Ms2ger Oct 16, 2025

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This case isn't testing the constructor, which is what this file is for. I believe there's a file for the value getter/setter nearby

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@Liedtke Liedtke Oct 20, 2025

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Good catch. After checking how I missed that, I realized that I missed one "include" in my invocation for this file and that script was reponsible for actually executing the test cases. (It isn't very obvious to me how to run these scripts in e.g. d8.)

I addressed this issue now by splitting it up into testing the constructor and a separate test case for get-set.


test(() => {
let global = new WebAssembly.Global({value: "externref"});
assert_Global(global, undefined);
}, "externref global with default value");
21 changes: 21 additions & 0 deletions test/js-api/global/value-get-set.any.js
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Expand Up @@ -150,3 +150,24 @@ test(() => {
assert_equals(setter.call(global, 1, {}), undefined);
assert_equals(global.value, 1);
}, "Stray argument");

test(() => {
let global = new WebAssembly.Global({value: "externref", mutable: true});
for (let value of [
undefined,
null,
true,
1,
-0,
1.5,
-2n,
Symbol("test"),
"string",
{"an": "object"},
() => null
]) {
global.value = value;
assert_equals(global.value, value);
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@Liedtke Liedtke Oct 20, 2025

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See also #1984 (comment), this tests -0 as one of its inputs. assert_equals already treats 0 and -0 as different values:

assert_equals: expected -0 but got 0

Let me know if this is fine given that the current spec text isn't very precise.

assert_equals(global.valueOf(), value);
}
}, "externref global");