RSpec::Matchers.define :make_queries_matching do |matcher, expected_count = nil|
supports_block_expectations
match do |block|
@counter = query_count(matcher, &block)
if expected_count
@counter.count == expected_count
else
@counter.count > 0
end
end
failure_message_when_negated do |_|
if expected_count
"expected #{matcher} not to match #{expected_count} queries, got #{@counter.count} matches:\n\n#{@counter.inspect}"
else
"expected #{matcher} not to match any query, got #{@counter.count} matches:\n\n#{@counter.inspect}"
end
end
failure_message do |_|
if expected_count
"expected #{matcher} to match #{expected_count} queries, got #{@counter.count} matches:\n\n#{@counter.inspect}"
else
"expected #{matcher} to match at least one query, got #{@counter.count} matches:\n\n#{@counter.inspect}"
end
end
def query_count(regex, &block)
@recorder = ActiveRecord::QueryRecorder.new(&block).log
@recorder.select{ |q| q.match(regex) }
end
end