Running tests of a test class that has as many tests as there are test classes in the module will run all tests in the module

[ahoppen]

If you have a project with the following test file and no other tests and you try to run MyTests, then it will run MyOtherTests as well.

import XCTest

class MyTests: XCTestCase {
  func test1() {}
  func test2() {}
}

class MyOtherTests: XCTestCase {
  func testOther() {}
}

I think the bug is that itemContainingAllArgs is just checking counts and because there are two tests to run, it thinks that all the tests in the module (or project, not sure about the granularity here) are included, because the module/project also has two children.

vscode-swift/src/TestExplorer/TestRunArguments.ts

Line 125 in b8e8e1c

return xcTestArgs.length + swiftTestArgs.length === testItem.children.size;

[michael-weng]

Verified on e7f81c9
Able to run MyTests only in the provided example in the issue.