{"id":206984,"date":"2025-07-08T10:07:38","date_gmt":"2025-07-08T02:07:38","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206984\/"},"modified":"2025-07-08T10:07:38","modified_gmt":"2025-07-08T02:07:38","slug":"%e6%b5%8b%e8%af%95%e8%bf%94%e5%9b%9e%e6%8e%a5%e5%8f%a3%e7%9a%84%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206984\/","title":{"rendered":"\u6d4b\u8bd5\u8fd4\u56de\u63a5\u53e3\u7684\u51fd\u6570"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u6d4b\u8bd5\u8fd4\u56de\u63a5\u53e3\u7684\u51fd\u6570<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-19 11:09:34<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5b66\u4e60\u77e5\u8bc6\u8981\u5584\u4e8e\u601d\u8003\uff0c\u601d\u8003\uff0c\u518d\u601d\u8003\uff01\u4eca\u5929\u5c0f\u7f16\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u6d4b\u8bd5\u8fd4\u56de\u63a5\u53e3\u7684\u51fd\u6570\u300b<\/span>\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u5305\u542b<\/span>\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6216\u51c6\u5907\u5b66\u4e60Golang<\/span>\uff0c\u5c31\u90fd\u4e0d\u8981\u9519\u8fc7\u672c\u6587\u5566~\u8ba9\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff0c\u80fd\u5e2e\u52a9\u5230\u4f60\u5c31\u66f4\u597d\u4e86\uff01<\/span><\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u5728\u4e3a\u4e0b\u9762\u7684\u6848\u4f8b\u7f16\u5199\u6d4b\u8bd5\u65f6\u9047\u5230\u56f0\u96be\u3002<\/p>\n

\u6211\u53ef\u4ee5\u4f7f\u7528\u4ec5\u5b9e\u73b0\u6211\u81ea\u5df1\u4f7f\u7528\u7684\u529f\u80fd\u7684\u6a21\u62df\u5bf9\u8c61\u7f16\u5199\u201chelper\u201d\u6d4b\u8bd5\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528\u6a21\u62df\u5bf9\u8c61\u4e3a\u51fd\u6570\u201cnew\u201d\u7f16\u5199\u6d4b\u8bd5\u4ee3\u7801\u800c\u4e0d\u6a21\u62df\u51fd\u6570 c()\u3001d()\uff1f<\/p>\n

\u53ef\u80fd\u662f\u53e6\u4e00\u4e2a\u5305\u5199\u5f97\u4e0d\u597d\uff0c\u5b83\u4e0d\u5e94\u8be5\u8fd4\u56de\u63a5\u53e3\u800c\u662f\u5b9e\u9645\u7684\u7ed3\u6784\uff1f<\/p>\n

package main\n\nimport (\n    \"fmt\"\n)\n\nfunc main() {\n    New()\n}\n\nfunc New() {\n    new(NewFromEnvironment)\n}\n\ntype newTopology func()(Interface,error)\n\n\/\/ new is non-exposed simply used for testing purpose.\nfunc new(newTopology newTopology) {\n  t,_ :=  newTopology()\n  helper(t)\n}\n\n\/\/ I need to call only A and B\ntype topologyInterface interface {\n    A() string\n    B() string\n}\n\nfunc helper(topology topologyInterface) {\n    s1 := topology.A()\n    s2 := topology.B()\n    fmt.Println(s1 + \",\" + s2)\n}\n\n\/\/ Below are from other package named \"topology\".\n\/\/ I have no control to the code below.\n\ntype Interface interface {\n    A() string\n    B() string\n    C() string\n    D() string\n    \/\/... more\n}\n\nfunc NewFromEnvironment() (Interface, error) {\n    return P{}, nil\n}\n\ntype P struct{}\n\nfunc (p P) A() string {\n    return \"A\"\n}\n\nfunc (p P) B() string {\n    return \"B\"\n}\n\nfunc (p P) C() string {\n    return \"C\"\n}\n\nfunc (p P) D() string {\n    return \"D\"\n}\n\n\/\/ more...<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u60a8\u53ef\u4ee5\u5c1d\u8bd5\u521b\u5efa\u4e00\u4e2a\u5d4c\u5165 p<\/code> \u7684\u7ed3\u6784 mockp<\/code>\u3002\u7136\u540e mockp<\/code> \u7ee7\u627f p<\/code> \u7684\u6240\u6709\u65b9\u6cd5\uff0c\u4f46\u60a8\u53ef\u4ee5\u4f7f\u7528\u81ea\u5df1\u7684\u6a21\u62df\u5b9e\u73b0\u6765\u9690\u85cf a()<\/code> \u548c b()<\/code> \u3002\u8fd9\u662f\u4e00\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
package main\n\nimport (\n    \"fmt\"\n)\n\ntype interface interface {\n    a()\n    b()\n}\n\ntype p struct {\n}\n\nfunc (p p) a() {\n    fmt.println(\"a\")\n}\n\n\nfunc (p p) b() {\n    fmt.println(\"b\")\n}\n\ntype mockp struct {\n    p\n}\n\n\/\/ shadow p's b() method\nfunc (p mockp) b() {\n    fmt.println(\"mock b\")\n}\n\nfunc main() {\n    var p interface = mockp{}\n    p.a()\n    p.b()\n}<\/pre>\n
\u8f93\u51fa\uff1a<\/p>\n
A\nMock B\n<\/pre>\n
\u672c\u7bc7\u5173\u4e8e\u300a\u6d4b\u8bd5\u8fd4\u56de\u63a5\u53e3\u7684\u51fd\u6570\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-206984","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206984","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=206984"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206984\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206984"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206984"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206984"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}