CedarAsync 允许您使用 Cedar 匹配器来测试异步代码。当编写集成测试而不是单元测试时，这非常有用。（CedarAsync 只支持 Cedar 的 should 语法。）

取代

client.lastResponse should contain(@"Google");

使用

in_time(client.lastResponse) should contain(@"Google");

来强制 contain 匹配器多次检查 client.lastResponse，直到成功或超时。

示例

#import "CedarAsync.h"
#import "HTTPClient.h"

SPEC_BEGIN(HTTPClientSpec)

using namespace Cedar::Matchers;

describe(@"HTTPClient", ^{
    __block HTTPClient *client;

    beforeEach(^{
        client = [[[HTTPClient alloc] init] autorelease];
    });

    it(@"can fetch google's homepage", ^{
        // uses NSURLRequest internally
        [client fetchURLString:@"http://google.com"];

        // plain Cedar matcher use - does not wait
        // (passes immediately since it takes sometime to fetch google)
        client.lastResponse should be_nil;

        // async matcher use - waits for lastResponse to contain 'Google'
        in_time(client.lastResponse) should contain(@"Google");
    });
});

SPEC_END

超时 & 轮询间隔

暂时更改超时和轮询间隔

CedarAsync::Timing::current_timeout = 4; // seconds
CedarAsync::Timing::current_poll = 0.3;  // seconds

或者

with_timeout(10, ^{
    in_time(valueThatTakesForever) should equal(@"so large...");
});

更改默认超时和轮询间隔（这些值在每个测试运行之前用于填充 current_timeout 和 current_poll）

CedarAsync::Timing::default_timeout = 4; // seconds
CedarAsync::Timing::default_poll = 2;    // seconds

待办事项

• 在每个测试后清理 NSRunLoop、GCD 等上的排队操作