module RSpec::StubbedEnv::TestHelpers

Helpers to unobtrusively stub ENV

Constants

STUBBED_KEY

Public Instance Methods

stub_env(key_or_hash, value = nil) click to toggle source

Can be called with all key value pairs to be stubbed as a hash:

stub_env('A' => 'B', 'C' => 'D', 'E' => 'F')

Alternatively can be called one per ENV key-value pair to stub:

stub_env('A', 'B')
stub_env('C', 'D')
stub_env('E', 'F')
# File lib/rspec/stubbed_env/test_helpers.rb, line 31
def stub_env(key_or_hash, value = nil)
  init_stub unless env_stubbed?
  if key_or_hash.is_a? Hash
    key_or_hash.each { |k, v| add_stubbed_value(k, v) }
  else
    add_stubbed_value key_or_hash, value
  end
end

Private Instance Methods

add_stubbed_value(key, value) click to toggle source
# File lib/rspec/stubbed_env/test_helpers.rb, line 44
def add_stubbed_value(key, value)
  allow(ENV).to receive(:[]).with(key).and_return(value)
  allow(ENV).to receive(:fetch).with(key).and_return(value)
  allow(ENV).to receive(:fetch).with(key, anything) do |_, default_val|
    value || default_val
  end
end
env_stubbed?() click to toggle source
# File lib/rspec/stubbed_env/test_helpers.rb, line 52
def env_stubbed?
  ENV[STUBBED_KEY]
end
init_stub() click to toggle source
# File lib/rspec/stubbed_env/test_helpers.rb, line 56
def init_stub
  allow(ENV).to receive(:[]).and_call_original
  allow(ENV).to receive(:fetch).and_call_original
  add_stubbed_value(STUBBED_KEY, true)
end