与@Josh Crews的做法基本相同,我主要是基于这个链接:
http://www.anthonyeden.com/2010/11/testing-rest-apis-with-cucumber-and-rack-test/#comment-159。但有两个显著的例外:1)我测试实际的响应体,2)我演示如何测试POST请求。下面是一个使用Rails 3.0.9的示例:
步骤:
When /^I send a GET request to "([^\"]*)"$/ do |url|
authorize(User.last.email, "cucumber")
header 'Accept', 'application/json'
header 'Content-Type', 'application/json'
get url
end
When /^I send a POST request to "([^\"]*)" with:$/ do |url, body|
authorize(User.last.email, "cucumber")
header 'Accept', 'application/json'
header 'Content-Type', 'application/json'
post url, body
end
Then /^the JSON response should have (\d+) "([^\"]*)" elements$/ do |number_of_children, name|
page = JSON.parse(last_response.body)
page.map { |d| d[name] }.length.should == number_of_children.to_i
end
Then /^I should receive the following JSON response:$/ do |expected_json|
expected_json = JSON.parse(expected_json)
response_json = JSON.parse(last_response.body)
response_json.should == expected_json
end
Then /^I should receive the following JSON object response:$/ do |expected_json|
expected_json = JSON.parse(expected_json)
response_json = JSON.parse(last_response.body)
if expected_json['id'] == 'RESPONSE_ID'
expected_json['id'] = response_json['id']
end
response_json.should == expected_json
end
特征:
Feature: Users API
Background:
Given the following users exist:
| id | name |
| 1 | Joe |
| 2 | Sue |
| 3 | Paul |
Scenario: Index action
When I send a GET request to "/users/"
Then the JSON response should have 3 "user" elements
And I should receive the following JSON response:
"""
[
{
"id":1,
"name":"Joe"
},
{
"id":2,
"name":"Sue"
},
{
"id":3,
"name":"Paul"
}
]
"""
Scenario: Create action
When I send a POST request to "/users/" with:
"""
{
"name":"Polly"
}
"""
Then I should receive the following JSON object response:
"""
{
"id":"RESPONSE_ID",
"name":"Polly"
}
"""
And I send a GET request to "/users/"
And the JSON response should have 4 "user" elements
visit '/', :post
。下面的答案展示了如何使用 Capybara 实现。 - John Hinnegan