Logo: Relish

  1. Sign in

Project: RSpec Mocks 3.9

Hide Undefined Constant

Hiding a constant that is already undefined is a no-op. This can be useful when a spec file
may run in either an isolated environment (e.g. when running one spec file) or in a full
environment with all parts of your code base loaded (e.g. when running your entire suite).

Scenarios
Hiding undefined constant
Given
a file named "hide_const_spec.rb" with:
RSpec.describe "hiding UNDEFINED_CONSTANT" do
  it "has no effect" do
    hide_const("UNDEFINED_CONSTANT")
    expect { UNDEFINED_CONSTANT }.to raise_error(NameError)
  end

  it "is still undefined after the example completes" do
    expect { UNDEFINED_CONSTANT }.to raise_error(NameError)
  end
end
When
I run rspec hide_const_spec.rb
Then
the examples should all pass

Last published 2 months ago by Jon Rowe.