new: support for showing coverage on single function test. closes #1637

[primalmotion]

I took a shot at implementing #1637.

[msftclas]

All CLA requirements met.

[primalmotion]

hum the test failed, on go tip, and I don't think really understand how it would be related to my changes :/

[lggomez]

@primalmotion the ci log shows that the linter failed: https://travis-ci.org/Microsoft/vscode-go/jobs/368922868#L877

Run the TS linter on the files you changed and try again

You can install it here: https://marketplace.visualstudio.com/items?itemName=eg2.tslint

[primalmotion]

Subtle :) I’ll fix it asap

[primalmotion]

lint is fixed, but tests are failing on go:tip

[ramya-rao-a]

I am wary on re-using the setting coverOnTestPackage for this purpose.
coverOnTestPackage setting is true by default. So when people run all tests in a package, all related code files get coverage. Which makes sense, because all applicable tests are run and the coverage is shown.

If we re-use this setting, then when users run individual tests, then the coverage will show up by default, probably highlighting most of the code in red (assuming the single test was covering a very small portion of the complete code)

Also, the same wont happen when the user runs all tests in current file. So there is an inconsistency.

I would suggest to add a new setting instead coverOnSingleTest and keep it false by default.

[primalmotion]

Sure I can add a new parameter.

[primalmotion]

@ramya-rao-a added requested changes

[ramya-rao-a]

Thanks!

[primalmotion]

Thanks!