在 rpsec-mocks 的 README 这样写
double.should_receive(:msg).and_yield(values,to,yield)
double.should_receive(:msg).and_yield(values,to,yield).and_yield(some,other,values,this,time)
# for methods that yield to a block multiple times
看不明白是什么意思，values,to,yield 分别是什么？
Source 是这样：
# Tells the object to yield one or more args to a block when the message
# is received.
#
# @example
#
# stream.stub(:open).and_yield(StringIO.new)
def and_yield(*args, &block)
if @args_to_yield_were_cloned
@args_to_yield.clear
@args_to_yield_were_cloned = false
end
if block
@eval_context = Object.new
@eval_context.extend RSpec::Mocks::InstanceExec
yield @eval_context
end
@args_to_yield << args
self
end
for methods that yield to a block multiple times
据我理解应该是 and_yield 在带有 block 的函数环境下的使用 value, to 是参数，yield 是外部的代码块. 比如：
def and_yield(*args, &block)
if block
yield bb
end
puts args
end
def test a
and_yield(1,2,a,yield)
end
test 3 do
puts 'yy'
end
