[英]How to test a method that yields with arguments x times?
I created a class SourceReader
that parses a file and would yield as many times depending on the number of recognized tokens inside the file. 我创建了一个
SourceReader
类,该类可以解析文件,并根据文件中识别出的标记的数量产生多次。 For example if I parse file1.txt
, it will yield with value one
once only. 例如,如果我解析
file1.txt
,它将只产生一次值为one
。 Another example is when I parse file2.txt
, it will yield twice, first with the value one
, and then with the value two
. 另一个示例是当我解析
file2.txt
,它将产生两次,首先是值one
,然后是值two
。
How do I test this properly using rspec? 如何使用rspec正确测试? Here is what I have so far:
这是我到目前为止的内容:
require './spec/spec_helper'
describe SourceReader do
describe '#each_card' do
context "given file with one card" do
input_filename = './spec/data/file1_spec.txt'
it 'yields once, with arguments "one"' do
File.open(input_filename, 'r') do |file|
sut = SourceReader.new(file)
expect(sut.each_card).to yield_with_args('one')
end
end
end
context "given file with two cards" do
input_filename = './spec/data/file2_spec.txt'
it 'yields twice, with arguments "one", then "two"' do
# some codes
end
end
end
end
I am confused on how to implement the expect { |b| object.action(&b) }.to yield_with_args
我对如何实现
expect { |b| object.action(&b) }.to yield_with_args
感到困惑 expect { |b| object.action(&b) }.to yield_with_args
found in the documentation 在文档中找到
expect { |b| object.action(&b) }.to yield_with_args
arr = []
sut.each_card do |arg|
arr << arg
end
expect(arr).to eq ['one', 'two']
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