useObserver registry refactor
#3598
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| throw new Error("This test must run with node >= 14") | ||
| } | ||
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| expect(observerFinalizationRegistry).toBeInstanceOf(globalThis.FinalizationRegistry) |
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What does it do if it fails? it's not inside any test
| import { observerFinalizationRegistry } from "../src/utils/observerFinalizationRegistry" | ||
| import { TimerBasedFinalizationRegistry } from "../src/utils/UniversalFinalizationRegistry" | ||
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| expect(observerFinalizationRegistry).toBeInstanceOf(TimerBasedFinalizationRegistry) |
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What does it do if it fails?
Throws?
it's not inside any test
Does it matter?
It's mainly intented to assert environment (bug in the test), rather than testing that observerFinalizationRegistry resolves to correct type (bug in the actual tested code).
Arguably I could split these into two, assertion to check globalThis for (not) being FinalizationRegistry and then an actual test for observerFinalizationRegistry. However I don't see much value in doing so.
| import gc from "expose-gc/function" | ||
| import { observerFinalizationRegistry } from "../src/utils/observerFinalizationRegistry" | ||
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| if (typeof globalThis.FinalizationRegistry !== "function") { |
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Maybe change this assertion also to expect to match the other checks?
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... But then the error message won't be the same think think
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Yes, I did want to preserve the message.
As discussed here #3590 (comment)