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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /js/src/jit-test/tests/debug/Promise-race-dependent-promises.js | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/jit-test/tests/debug/Promise-race-dependent-promises.js')
-rw-r--r-- | js/src/jit-test/tests/debug/Promise-race-dependent-promises.js | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Promise-race-dependent-promises.js b/js/src/jit-test/tests/debug/Promise-race-dependent-promises.js new file mode 100644 index 0000000000..196d29aeae --- /dev/null +++ b/js/src/jit-test/tests/debug/Promise-race-dependent-promises.js @@ -0,0 +1,46 @@ +// Promise.race(...) may add a dummy PromiseReaction which is only used for the +// debugger. +// +// See BlockOnPromise when called from PerformPromiseRace for when this dummy +// reaction is created. + +var g = newGlobal({newCompartment: true}); +var dbg = new Debugger(); +var gw = dbg.addDebuggee(g); + +function test(withFastPath) { + g.eval(` + function newPromiseCapability() { + var resolve, reject, promise = new Promise(function(r1, r2) { + resolve = r1; + reject = r2; + }); + return {promise, resolve, reject}; + } + + var {promise: alwaysPending} = newPromiseCapability(); + + if (!${withFastPath}) { + // Disable the BlockOnPromise fast path by giving |alwaysPending| a + // non-default "then" function property. This will ensure the dummy + // reaction is created. + alwaysPending.then = function() {}; + } + + var result = Promise.race([alwaysPending]); + `); + + var alwaysPending = gw.makeDebuggeeValue(g.alwaysPending); + var result = gw.makeDebuggeeValue(g.result); + + assertEq(alwaysPending.promiseDependentPromises.length, 1); + assertEq(alwaysPending.promiseDependentPromises[0], result); + + assertEq(result.promiseDependentPromises.length, 0); +} + +// No dummy reaction created when the fast path is taken. +test(true); + +// Dummy reaction is created when we can't take the fast path. +test(false); |