* service/dap: send continued event before step response
Send the continued event before the step response to make sure that there is no time where the client believes that only a single thread is running.
Updates golang/vscode-go#1617
* move to helper
daptest has type assertion functions that panic
if the read response/event message is not
the expected type. This is not only against the
recommended style guideline (Don't Panic, Useful
Test Failures, ...), but also it prevents from
quickly diagnosing test failures occurred in remote
CIs.
This PR changes the type assertion to the two
return value type assertion, and t.Fatal with details
if the type is not expected.
service/dap/daptest/main.go is a program that auto
generates those assertion functions in resp.go.
Run `go generate` from the service/dap directory
to update resp.go.
