{"id":1740,"date":"2015-03-28T01:09:06","date_gmt":"2015-03-27T17:09:06","guid":{"rendered":"http:\/\/blog.turn.tw\/?p=1740"},"modified":"2015-03-28T16:44:16","modified_gmt":"2015-03-28T08:44:16","slug":"%e4%b8%80%e5%a0%86dependency%e6%80%8e%e9%ba%bc%e6%b8%ac%e8%a9%a6%ef%bc%9f%e6%8a%8a%e6%9b%bf%e8%ba%ab%e5%8f%ab%e5%87%ba%e4%be%86%e3%80%82","status":"publish","type":"post","link":"https:\/\/blog.turn.tw\/?p=1740","title":{"rendered":"\u4e00\u5806dependency\u600e\u9ebc\u6e2c\u8a66\uff1f\u628a\u66ff\u8eab\u53eb\u51fa\u4f86\u3002"},"content":{"rendered":"<p>\u6211\u4efb\u8077\u7684\u7ffb\u8b6f\u516c\u53f8\u9700\u8981\u7dda\u4e0a\u5831\u50f9\u529f\u80fd\u3002<\/p>\n<p>\u5176\u4e2d\uff0c\u4e0a\u50b3\u6587\u4ef6\u5230\u5c08\u6848\u7684\u529f\u80fd\uff0c\u6703\u540c\u6642\u8a08\u7b97\u5b57\u6578\u3001\u5099\u4efd\u6a94\u6848\u5230\u9060\u7aef\u3002<\/p>\n<p>\u7a0b\u5f0f\u78bc\u5927\u6982\u662f\u9019\u6a23\uff1a<\/p>\n<pre>\r\n<?php\r\nclass Project\r\n{\r\n    public function addDocument($file){        \r\n        \/\/ \u5148\u91dd\u5c0d $file \u505a\u4e00\u5806\u6aa2\u67e5\r\n        \/\/ ...\r\n        \/\/ blah blah\r\n\r\n        \/\/ \u63a5\u8457\u958b\u59cb\u5e79\u6b63\u4e8b\r\n        $remote = new RemoteBackup();\r\n        \r\n        $id = $remote->upload($file);\r\n        \r\n        $reader = new Reader();\r\n        \r\n        $words = $reader->count($file);\r\n        \r\n        $document = new Document();\r\n        \r\n        $document->remote_file_id = $id;\r\n        \r\n        $document->words = $words;\r\n        \r\n        $document->save();\r\n    }\r\n}\r\n<\/pre>\n<p>\u7531\u65bc\u9019\u662f\u500b\u6838\u5fc3\u529f\u80fd\uff0c\u6211\u5e0c\u671b\u591a\u5beb\u5e7e\u500b\u6e2c\u8a66\u78ba\u4fdd\u5b83\u7684\u904b\u4f5c\u6b63\u5e38\u3002<\/p>\n<p>\u9019\u6a23\u7684function\u8a72\u600e\u9ebc\u6e2c\u8a66\u5462\uff1f<\/p>\n<p>\u6211\u662f\u7528Laravel + PHPUnit\u958b\u767c\u3002\u9996\u5148\uff0c\u5beb\u500b\u57fa\u672c\u6e2c\u8a66\uff0c\u78ba\u4fddfunction\u6c92\u6709\u6253\u932f\u8b8a\u6578\u540d\u5b57\u3001\u8a9e\u6cd5\u3001\u4e0d\u6703\u6709\u83ab\u540dexception\u5674\u51fa\u4f86\uff1a<\/p>\n<pre>\r\n<?php\r\n\r\nclass ProjectTest extends TestCase {\r\n    \r\n    public function testAddDocument()\r\n    {\r\n        \/\/ \u5148\u8a2d\u6cd5\u505a\u51fa\u6e2c\u8a66\u7528\u7684$project\u8207$file\r\n        \/\/ ....\r\n\r\n        $project->addDocument($file);\r\n                \r\n        $this->assertGreaterThan(0, $project->words);\r\n        \r\n        $this->assertNotNull($project->remote_file_id);        \r\n    }\r\n    \r\n}\r\n<\/pre>\n<p>\u554f\u984c\u4f86\u4e86\uff0c\u9019\u500b\u6e2c\u8a66\u8dd1\u5f97\u975e\u5e38\u6162\u3002\u56e0\u70ba\uff1a<\/p>\n<ul>\n<li>\u5b83\u771f\u7684\u628a\u6a94\u6848\u4e0a\u50b3\u5230\u8cc7\u6599\u5099\u4efd\u4e3b\u6a5f<\/li>\n<li>\u5b83\u771f\u7684\u7528Reader\u6578\u5b57\u6578<\/li>\n<\/ul>\n<p>\u6211\u53ea\u60f3\u78ba\u8a8d\u57fa\u672c\u908f\u8f2f\u6b63\u5e38\uff0c\u4e26\u4e0d\u5728\u4e4e\u5099\u4efd\u3001\u8a08\u7b97\u5b57\u6578\u529f\u80fd\u662f\u5426\u6b63\u5e38\u3002\uff08\u90a3\u5169\u500b\u61c9\u8a72\u53e6\u5916\u6e2c\u8a66\u3002\uff09<\/p>\n<p>\u8a72\u600e\u9ebc\u8fa6\u5462\uff1f<\/p>\n<p>\u662f\u6642\u5019\u53eb\u66ff\u8eab\u51fa\u4f86\u5e6b\u5fd9\u4e86\uff01<\/p>\n<h1>Test Double<\/h1>\n<p>Test Double\uff0c\u6211\u7ffb\u8b6f\u70ba\u300c\u6e2c\u8a66\u66ff\u8eab\u300d\uff0c\u662f<a href=\"http:\/\/www.amazon.com\/xUnit-Test-Patterns-Refactoring-Code\/dp\/0131495054\">Gerard Meszaros<\/a>\u57282007\u5e74\u63d0\u51fa\u4f86\u7684\u540d\u8a5e\u3002<br \/>\n\u5b83\u662f\u8edf\u9ad4\u6e2c\u8a66\u7684\u5e38\u898b\u624b\u6cd5\u4e4b\u4e00\uff0c\u6703\u505a\u51fa\u985e\u5225\u7684\u66ff\u8eab\u4f9b\u6e2c\u8a66\u4f7f\u7528\u3002<br \/>\n\u53c8\u53ef\u7d30\u5206\u70baFake, Mock, Stub, Dummy&#8230; \u7b49\u7b49\u3002<br \/>\n\u6211\u5011\u5148\u4e0d\u7ba1\u5dee\u5225\u4f55\u5728\uff0c\u60f3\u8fa6\u6cd5\u89e3\u6c7a\u773c\u524d\u7684\u72d7\u5c41\u5c31\u597d\uff01<\/p>\n<p>\u9996\u5148\uff0c\u6211\u5011\u5f97\u5c07\u539f\u672c\u7684function\u6539\u5beb\uff0c\u628adependency\u6539\u7528\u53c3\u6578\u50b3\u5165\uff1a<\/p>\n<pre>\r\nclass Project\r\n{\r\n    public function addDocument($file, $remote, $reader){        \r\n        \/\/....\r\n        \/\/....\r\n\r\n        \/\/ $remote = new RemoteBackup();\r\n        \r\n        $id = $remote->upload($file);\r\n        \r\n        \/\/ $reader = new Reader();\r\n        \r\n        $words = $reader->count($file);\r\n        \r\n        $document = new Document();\r\n        \r\n        $document->remote_file_id = $id;\r\n        \r\n        $document->words = $words;\r\n        \r\n        $document->save();\r\n    }\r\n}\r\n\r\n<\/pre>\n<p>\u547c\u53eb\u9019\u500bfunction\u7684\u76f8\u95dccode\uff0c\u8a18\u5f97\u6539\u5beb\u6210\uff1a<\/p>\n<pre>\r\n$project->addDocument($file, new RemoteBackup(), new Reader());\r\n<\/pre>\n<p>\u91cd\u9ede\u4f86\u4e86\uff0c\u6e2c\u8a66\u600e\u9ebc\u5beb\uff1f\u600e\u9ebc\u505a\u51fa\u6e2c\u8a66\u66ff\u8eab\uff1f<\/p>\n<p>\u6211\u60f3\u8981\u4e00\u500b\u4e0d\u7ba1\u6536\u5230\u4ec0\u9ebc\uff0c\u4e00\u5f8b\u56de\u50b35555\u7576\u4f5c\u5047id\u7684$remote\u66ff\u8eab\uff1b<br \/>\n\u9084\u8981\u4e00\u500b\u4e0d\u7ba1\u6536\u5230\u4ec0\u9ebc\uff0c\u90fd\u8aaa\u5b83\u8a08\u7b97\u51fa6666\u500b\u5b57\u6578\u7684$reader\u66ff\u8eab\u3002<\/p>\n<p><a href=\"https:\/\/phpunit.de\/manual\/current\/en\/test-doubles.html\">PHPUnit\u672c\u8eab\u5c31\u652f\u63f4Test Double<\/a>\uff0c\u53ea\u8981\u9019\u6a23\u5373\u53ef\uff1a<\/p>\n<pre>\r\nclass ProjectTest extends TestCase {\r\n    \r\n    public function testAddDocument()\r\n    {\r\n        \/\/ \u5148\u8a2d\u6cd5\u505a\u51fa\u6e2c\u8a66\u7528\u7684$project\u8207$file\r\n        \/\/ ...\r\n\r\n        $remote = $this->getMockBuilder('RemoteBackup')\r\n                     ->getMock();\r\n\r\n        $remote->method('upload')\r\n             ->willReturn(5555);\r\n             \r\n        $reader = $this->getMockBuilder('Reader')\r\n                     ->getMock();\r\n\r\n        $reader->method('count')\r\n             ->willReturn(6666);\r\n             \r\n        $project->addDocument($file, $remote, $reader);\r\n                \r\n        $this->assertGreaterThan(0, $project->words);\r\n        \r\n        $this->assertNotNull($project->remote_file_id);        \r\n    }\r\n    \r\n}\r\n<\/pre>\n<p>\u641e\u5b9a\uff01<br \/>\n\u6210\u529f\u907f\u958b\u9060\u7aef\u5099\u4efd\u8207\u8a08\u7b97\u5b57\u6578\u7684dependency\uff01<\/p>\n<p>\u6e2c\u8a66\u5b8c\u57fa\u672c\u908f\u8f2f\uff0c\u63a5\u8457\u53ef\u4ee5\u5beb\u5404\u7a2e\u4e0d\u540c\u7684\u6e2c\u8a66\uff0c\u53bb\u6aa2\u9a57\u4f60\u60f3\u78ba\u8a8d\u7684\u90e8\u4efd\uff0c<br \/>\n\u5168\u90fd\u4e0d\u6703\u771f\u7684\u4e0a\u50b3\u6a94\u6848\u5230\u5099\u4efd\u4e3b\u6a5f\u8207\u8a08\u7b97\u5b57\u6578\uff01<\/p>\n<p>\u5229\u7528test double\u7684\u624b\u6cd5\uff0c\u4f60\u53ef\u4ee5\u907f\u958b\u4e00\u5927\u5806\u7684dependency\uff0c\u6e2c\u8a66\u5230\u4f60\u539f\u672c\u4ee5\u70ba\u4e0d\u53ef\u80fd\u6e2c\u8a66\u7684\u5730\u65b9\u3002<\/p>\n<p>\u5f88\u795e\u5947\u5427\uff01<\/p>\n<hr \/>\n<h3>Q&#038;A<\/h3>\n<p><em>Q1: \u628a\u7269\u4ef6\u7576dependency\u50b3\u5165\u771f\u7684\u597d\u5e25\u5594\uff0c\u9019\u62db\u53eb\u4ec0\u9ebc\uff1f<br \/>\n<\/em><br \/>\n\u9019\u62db\u53ea\u662fdependency injection\u7684\u4e00\u7a2e\u3002<\/p>\n<p>\u70ba\u4e86\u8b93code\u80fd\u5920\u88ab\u6e2c\u8a66\uff0c\u9019\u62db\u5f88\u5e38\u7528\u5230\u3002<\/p>\n<p><em>Q2: function\u50b3\u5165\u6a94\u6848$file\u53c8\u50b3\u5165$remote\u8ddf$reader\u3002\u6211\u600e\u9ebc\u89ba\u5f97\u919c\u5230\u7206\u554a\uff1f<br \/>\n<\/em><br \/>\n\u9019\u6a23\u5beb\u78ba\u5be6\u5f88\u919c\u3002<\/p>\n<p>\u901a\u5e38\u7269\u4ef6dependency\u662f\u5148\u5728constructor\u50b3\u5165\uff0c\u518d\u5f9efunction\u5167\u62ff\u4f86\u7528\uff1a<\/p>\n<pre>\r\n        \/\/ $id = $remote->upload($file);\r\n        $id = $this->remote->upload($file);\r\n\r\n        \/\/ $words = $reader->count($file);\r\n        $words = $this->reader->count($file);\r\n<\/pre>\n<p>\u4f60\u5e38\u5e38\u770b\u5230\u7684\u9019\u7a2epattern\u5c31\u662f\u5728\u5e79\u9019\u4ef6\u4e8b\uff1a<\/p>\n<pre>\r\n$stuff = new GoodClass(new ClassOne(), new ClassTwo());\r\n<\/pre>\n<pre>\r\n    public function __constructor($dependencyOne, $dependencyTwo)\r\n    {\r\n        $this->dependencyOne = $dependencyOne;\r\n        $this->dependencyTwo = $dependencyTwo;\r\n    }\r\n<\/pre>\n<p>\u4f46\u662f\u6211\u61f6\u5f97\u6539\u5beb\u6240\u6709\u76f8\u95dccode\uff0c\u800c\u4e14Laravel\u7684Eloquent\u5efa\u69cb\u5f0f\u53c8\u5f88\u96e3\u641e\u5b9a\u7269\u4ef6dependency\u3002<\/p>\n<p>\u5b78\u5230\u7cbe\u795e\u5c31\u597d\uff0c\u5beb\u6cd5\u96a8\u6a5f\u61c9\u8b8a\u3002<\/p>\n<p><em>Q3: \u6211\u9084\u6eff\u597d\u5947\uff0c\u4f60\u63d0\u5230\u7684\u7ffb\u8b6f\u516c\u53f8\u7db2\u7ad9\u9577\u600e\u6a23\uff1f<br \/>\n<\/em><br \/>\n<a href=\"http:\/\/wordcorp.net\/\">http:\/\/wordcorp.net\/<\/a><\/p>\n<p>(Photo via <a href=\"https:\/\/www.flickr.com\/photos\/almaarte_photography\/\">AlmaArte Photography<\/a>, CC licensed. )<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u4efb\u8077\u7684\u7ffb\u8b6f\u516c\u53f8\u9700\u8981\u7dda\u4e0a\u5831\u50f9\u529f\u80fd\u3002 \u5176\u4e2d\uff0c\u4e0a\u50b3\u6587\u4ef6\u5230\u5c08\u6848\u7684\u529f\u80fd\uff0c\u6703\u540c\u6642\u8a08\u7b97\u5b57\u6578\u3001\u5099\u4efd\u6a94\u6848\u5230\u9060\u7aef\u3002 \u7a0b\u5f0f\u78bc\u5927\u6982\u662f &hellip; <a href=\"https:\/\/blog.turn.tw\/?p=1740\" class=\"more-link\">\u7e7c\u7e8c\u95b1\u8b80 <span class=\"screen-reader-text\">\u4e00\u5806dependency\u600e\u9ebc\u6e2c\u8a66\uff1f\u628a\u66ff\u8eab\u53eb\u51fa\u4f86\u3002<\/span> <span class=\"meta-nav\">&rarr;<\/span> <\/a><\/p>\n","protected":false},"author":1,"featured_media":1848,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[2,4],"tags":[8,14,19,33,34,29,35,25],"_links":{"self":[{"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/posts\/1740"}],"collection":[{"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1740"}],"version-history":[{"count":39,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/posts\/1740\/revisions"}],"predecessor-version":[{"id":1862,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/posts\/1740\/revisions\/1862"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=\/wp\/v2\/media\/1848"}],"wp:attachment":[{"href":"https:\/\/blog.turn.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1740"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.turn.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}