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[SR-5262] XCTest should have a way to validate assertions #370

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phausler opened this issue Jun 19, 2017 · 1 comment
Open

[SR-5262] XCTest should have a way to validate assertions #370

phausler opened this issue Jun 19, 2017 · 1 comment

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@phausler
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@phausler phausler commented Jun 19, 2017

Previous ID SR-5262
Radar None
Original Reporter @phausler
Type New Feature
Additional Detail from JIRA
Votes 0
Component/s XCTest
Labels New Feature
Assignee None
Priority Medium

md5: 45492463837a5115b54a5e4cdffbc273

Issue Description:

Often times when testing code it is helpful to validate assertion cases that have preconditions or fatalErrors. A method that would aide in this endeavor would be something along the lines of XCTAssertIsFatal where a block of code is passed in that is expected to trigger a fatalError.

Normally this would mean that the code would crash. However if a signal handler for SIGILL is installed we can validate if an assertion is tripped.

See https://github.com/phausler/swift-corelibs-xctest/tree/assert_fatal for a rough draft at handling fatal assertions (note this only works in a non attached debugger mode and has only been written for Darwin, however a linux port should be trivial)

@belkadan
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@belkadan belkadan commented Jun 20, 2017

This has been discussed before. StdlibUnittest takes a different approach: fork off a child process, and check its output. That's a little less dangerous—recovering from a fatalError means leaking memory at the very least.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 9, 2022
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