60 lines
1.6 KiB
Ruby
60 lines
1.6 KiB
Ruby
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# frozen_string_literal: true
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require 'rubocop-rspec'
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module RuboCop
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module Cop
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module RSpec
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# Check for ENV mocking in specs.
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# See https://docs.gitlab.com/ee/development/testing_guide/best_practices.html#persistent-in-memory-application-state
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#
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# @example
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#
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# # bad
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# allow(ENV).to receive(:[]).with('FOO').and_return('bar')
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# allow(ENV).to receive(:fetch).with('FOO').and_return('bar')
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# allow(ENV).to receive(:[]).with(key).and_return(value)
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# allow(ENV).to receive(:[]).with(fetch_key(object)).and_return(fetch_value(object))
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#
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# # good
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# stub_env('FOO', 'bar')
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# stub_env(key, value)
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# stub_env(fetch_key(object), fetch_value(object))
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class EnvMocking < RuboCop::Cop::Base
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extend RuboCop::Cop::AutoCorrector
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MESSAGE = "Don't mock the ENV, use `stub_env` instead."
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def_node_matcher :env_mocking?, <<~PATTERN
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(send
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(send nil? :allow
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(const {nil? cbase} :ENV)
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)
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:to
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(send
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(send
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(send nil? :receive (sym {:[] :fetch}))
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:with $_
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)
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:and_return $_
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)
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...
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)
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PATTERN
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def on_send(node)
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env_mocking?(node) do |key, value|
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add_offense(node, message: MESSAGE) do |corrector|
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corrector.replace(node.loc.expression, stub_env(key.source, value.source))
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end
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end
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end
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def stub_env(key, value)
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"stub_env(#{key}, #{value})"
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end
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end
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end
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end
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end
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