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require 'spec_helper'
describe ClimateControl::Modifier do
it 'modifies the environment' do
with_modified_env VARIABLE_1: 'bar', VARIABLE_2: 'qux' do
expect(ENV['VARIABLE_1']).to eq 'bar'
expect(ENV['VARIABLE_2']).to eq 'qux'
end
expect(ENV['VARIABLE_1']).to be_nil
expect(ENV['VARIABLE_2']).to be_nil
end
it 'allows for environment variables to be assigned within the block' do
with_modified_env VARIABLE_1: 'modified' do
ENV['ASSIGNED_IN_BLOCK'] = 'assigned'
end
expect(ENV['ASSIGNED_IN_BLOCK']).to eq 'assigned'
end
it 'reassigns previously set environment variables' do
ENV['VARIABLE_ASSIGNED_BEFORE_MODIFYING_ENV'] = 'original'
expect(ENV['VARIABLE_ASSIGNED_BEFORE_MODIFYING_ENV']).to eq 'original'
with_modified_env VARIABLE_ASSIGNED_BEFORE_MODIFYING_ENV: 'overridden' do
expect(ENV['VARIABLE_ASSIGNED_BEFORE_MODIFYING_ENV']).to eq 'overridden'
end
expect(ENV['VARIABLE_ASSIGNED_BEFORE_MODIFYING_ENV']).to eq 'original'
end
it 'persists the change when overriding the variable in the block' do
with_modified_env VARIABLE_MODIFIED_AND_THEN_ASSIGNED: 'modified' do
ENV['VARIABLE_MODIFIED_AND_THEN_ASSIGNED'] = 'assigned value'
end
expect(ENV['VARIABLE_MODIFIED_AND_THEN_ASSIGNED']).to eq 'assigned value'
end
it 'resets environment variables even if the block raises' do
expect {
with_modified_env FOO: 'bar' do
raise 'broken'
end
}.to raise_error
expect(ENV['FOO']).to be_nil
end
it 'preserves environment variables set within the block' do
ENV['CHANGED'] = 'old value'
with_modified_env IRRELEVANT: 'ignored value' do
ENV['CHANGED'] = 'new value'
end
expect(ENV['CHANGED']).to eq 'new value'
end
it 'returns the value of the block' do
value = with_modified_env VARIABLE_1: 'bar' do
'value inside block'
end
expect(value).to eq 'value inside block'
end
def with_modified_env(options, &block)
ClimateControl::Modifier.new(options, &block).process
end
around do |example|
old_env = ENV.to_hash
example.run
ENV.clear
old_env.each do |key, value|
ENV[key] = value
end
end
end
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