Feature: Make sure "Given", "When", "Then" steps work as expected

Scenario: Variable names can only contain uppercase letters, digits and underscores and cannot begin with a digit.

When I run `echo value`

And save STDOUT as {VARIABLE_NAME}

And save STDOUT as {V}

And save STDOUT as {_VARIABLE_NAME_STARTING_WITH_UNDERSCORE}

And save STDOUT as {_}

And save STDOUT as {VARIABLE_NAME_WITH_DIGIT_2}

And save STDOUT as {V2}

And save STDOUT as {_2}

And save STDOUT as {2_VARIABLE_NAME_STARTING_WITH_DIGIT}

And save STDOUT as {2}

And save STDOUT as {VARIABLE_NAME_WITH_lowercase}

And save STDOUT as {v}

When I run `echo {VARIABLE_NAME}`

Then STDOUT should match /^value$/

And STDOUT should be:

"""

When I run `echo {V}`

Then STDOUT should match /^value$/

When I run `echo {_VARIABLE_NAME_STARTING_WITH_UNDERSCORE}`

Then STDOUT should match /^value$/

When I run `echo {_}`

Then STDOUT should match /^value$/

When I run `echo {VARIABLE_NAME_WITH_DIGIT_2}`

Then STDOUT should match /^value$/

When I run `echo {V2}`

Then STDOUT should match /^value$/

When I run `echo {_2}`

Then STDOUT should match /^value$/

When I run `echo {2_VARIABLE_NAME_STARTING_WITH_DIGIT}`

Then STDOUT should match /^\{2_VARIABLE_NAME_STARTING_WITH_DIGIT}$/

And STDOUT should contain:

"""

When I run `echo {2}`

Then STDOUT should match /^\{2}$/

When I run `echo {VARIABLE_NAME_WITH_lowercase}`

Then STDOUT should match /^\{VARIABLE_NAME_WITH_lowercase}$/

When I run `echo {v}`

Then STDOUT should match /^\{v}$/