55 lines
1.3 KiB
Ruby
55 lines
1.3 KiB
Ruby
# frozen_string_literal: true
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module RuboCop
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module Cop
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module RSpec
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# This cop checks for ENV assignment in specs
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#
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# @example
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#
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# # bad
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# before do
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# ENV['FOO'] = 'bar'
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# end
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#
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# # good
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# before do
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# stub_env('FOO', 'bar')
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# end
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class EnvAssignment < RuboCop::Cop::Cop
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MESSAGE = "Don't assign to ENV, use `stub_env` instead.".freeze
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def_node_search :env_assignment?, <<~PATTERN
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(send (const nil? :ENV) :[]= ...)
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PATTERN
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# Following is what node.children looks like on a match
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# [s(:const, nil, :ENV), :[]=, s(:str, "key"), s(:str, "value")]
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def on_send(node)
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return unless env_assignment?(node)
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add_offense(node, location: :expression, message: MESSAGE)
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end
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def autocorrect(node)
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lambda do |corrector|
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corrector.replace(node.loc.expression, stub_env(env_key(node), env_value(node)))
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end
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end
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def env_key(node)
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node.children[2].source
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end
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def env_value(node)
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node.children[3].source
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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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