Make Cancel Discovery faster and more reliable #3527
Merged
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Add tests at the start that are fast to discover and cancel only once on the first of them (#3526).
Make the delay much smaller because it is multiplied by 3 because we create that attribute 3 times (microsoft/testfx#1056). This makes the first test be reported much sooner (we wait for all attributes to be created when scanning the class / dll microsoft/testfx#1057). Then to make sure discovery is still running, add 3 tests that slow down the discovery to make sure we are still discovering while we call cancel.