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# minitest-stub-const
[](https://travis-ci.org/adammck/minitest-stub-const)
Stub constants for the duration of a block in MiniTest.
Similar to RSpec's [stub_const] [rspec].
## Example
Stub a constant for the duration of a block:
```ruby
module Foo
BAR = :original
end
Foo.stub_const(:BAR, :stubbed) do
Foo::BAR
end
# => :stubbed
Foo::BAR
# => :original
```
This is especially useful when testing that the expected class methods
are being called on a `Module` or `Class` instance:
```ruby
module SomeLib
class Thing
def self.add
fail NotImplementedError
end
end
end
class ThingAdder
def add_thing
SomeLib::Thing.add
end
end
describe ThingAdder do
describe '#add_thing' do
it 'should call Thing.add' do
adder = ThingAdder.new
mock = Minitest::Mock.new
mock.expect(:add, nil)
SomeLib.stub_const(:Thing, mock) do
adder.add_thing
end
assert mock.verify
end
end
end
```
## Installation
```sh
gem install minitest-stub-const # duh
```
## License
[minitest-stub-const] [repo] is free software, available under [the MIT license]
[license].
[repo]: https://raw.github.com/adammck/minitest-stub-const
[license]: https://raw.github.com/adammck/minitest-stub-const/master/LICENSE
[rspec]: https://www.relishapp.com/rspec/rspec-mocks/v/2-12/docs/mutating-constants
|
