add functional tests to the cli

[radiovisual]

Items that need to be tested via the CLI:

API Tests

• [ ] timecard new (with existing .timecard.json file, should confirm overwrite)
• [ ] timecard new (without existing .timecard.json file, shouldn't confirm overwrite)
• [ ] timecard new --no-prompt (shouldn't confirm overwrite)
• [ ] timecard clockin && timecard clockin (show show clockout pending error)
• [ ] timecard clockout && timecard clockout (show show clockin pending error)
• [ ] timecard print (should print timecard)
• [ ] timecard clockin && timecard print (should print pending clockout message in output)
• [ ] timecard clockin (with existing .timecard.json file, should show clockin message)
• [ ] timecard clockout (with existing .timecard.json file, should show clockout message)
• [ ] timecard print (with existing .timecard.json file, should print timecard)
• [ ] timecard clockin (without existing .timecard.json file, shouldn't show error)
• [ ] timecard clockout (without existing .timecard.json file, shouldn't show error)
• [ ] timecard print (without existing .timecard.json file, shouldn't show error)
• [ ] timecard clockin (with invalid .timecard.json file, should show error)
• [ ] timecard clockout (with invalid .timecard.json file, should show error)
• [ ] timecard print (with invalid .timecard.json file, should show error)
• [ ] timecard version (should output version)
• [ ] timecard (should show help when called with no arguments)
• [ ] timecard help (should show help)

  Additional Tests

In a package with a package.json file

• [ ] Test that API commands will only effect the root .timecard.json file no matter how many directories deep the user is

In a package without a package.json file

• [ ] Test that API commands will only attempt to work on a .timecard.json file in the same directory

[radiovisual]

https://github.com/TooTallNate/ttys

[radiovisual]

Vorpal Inspiration:

Vorpal.execSync lets you get the output of a command in sync, which is useful, also make use of the intercept function to grab the stdout:

https://github.com/dthree/cash/blob/master/src/util/intercept.js

Vorpal can simulate keypresses with its UI functions: https://github.com/dthree/vorpal/wiki/api-|-vorpal.ui

A ton of UI simulation in the wat tests, I believe, including tests on tabbed completion, etc: https://github.com/dthree/wat/tree/master/test

[radiovisual]

execa Inspiration:

https://github.com/sindresorhus/detect-indent-cli/blob/master/test.js