{"id":207507,"date":"2025-07-08T12:24:24","date_gmt":"2025-07-08T04:24:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207507\/"},"modified":"2025-07-08T12:24:24","modified_gmt":"2025-07-08T04:24:24","slug":"testmain-%e6%b2%a1%e6%9c%89%e8%a6%81%e8%bf%90%e8%a1%8c%e7%9a%84%e6%b5%8b%e8%af%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207507\/","title":{"rendered":"TestMain – \u6ca1\u6709\u8981\u8fd0\u884c\u7684\u6d4b\u8bd5"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> TestMain – \u6ca1\u6709\u8981\u8fd0\u884c\u7684\u6d4b\u8bd5<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-23 10:18:37<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587\u300aTestMain – \u6ca1\u6709\u8981\u8fd0\u884c\u7684\u6d4b\u8bd5\u300b<\/span>\u4e3b\u8981\u8bb2\u89e3\u4e86<\/span>\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n

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

\u6211\u6b63\u5728\u7f16\u5199\u4e00\u4e2a\u5305\uff0c\u5b83\u7f16\u8bd1 c \u6e90\u6587\u4ef6\u5e76\u5c06\u8f93\u51fa\u5199\u5165\u53e6\u4e00\u4e2a\u6587\u4ef6\u3002\u6211\u6b63\u5728\u4e3a\u8fd9\u4e2a\u5305\u7f16\u5199\u6d4b\u8bd5\uff0c\u6211\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u76ee\u5f55\u6765\u5199\u5165\u8f93\u51fa\u6587\u4ef6\u3002\u6211\u6b63\u5728\u4f7f\u7528 testmain<\/code> \u51fd\u6570\u6765\u6267\u884c\u6b64\u64cd\u4f5c\u3002\u7531\u4e8e\u67d0\u79cd\u539f\u56e0\uff0c\u5f53\u6211\u521a\u521a\u8fd0\u884c testmain<\/code> \u6d4b\u8bd5\u65f6\uff0c\u6211\u603b\u662f\u6536\u5230\u8b66\u544a\u201c\u6ca1\u6709\u8981\u8fd0\u884c\u7684\u6d4b\u8bd5\u201d\u3002\u6211\u5c1d\u8bd5\u8c03\u8bd5 testmain<\/code> \u51fd\u6570\uff0c\u53ef\u4ee5\u770b\u5230\u4e34\u65f6\u76ee\u5f55\u786e\u5b9e\u5df2\u521b\u5efa\u3002\u5f53\u6211\u624b\u52a8\u521b\u5efa testoutput<\/code> \u76ee\u5f55\u65f6\uff0c\u6240\u6709\u6d4b\u8bd5\u90fd\u901a\u8fc7\u3002<\/p>\n

\u6211\u6b63\u5728\u4ece testdata<\/code> \u76ee\u5f55\u52a0\u8f7d\u4e24\u4e2a c \u6e90\u6587\u4ef6\uff0c\u5176\u4e2d\u4e00\u4e2a\u662f\u6545\u610f\u9519\u8bef\u7684\u3002<\/p>\n

gcc.go\uff1a<\/p>\n

package gcc\n\nimport (\n    \"os\/exec\"\n)\n\nfunc compile(inpath, outpath string) error {\n    cmd := exec.command(\"gcc\", inpath, \"-o\", outpath)\n    return cmd.run()\n}<\/pre>\n
gcc_test.go\uff1a<\/p>\n
package gcc\n\nimport (\n    \"os\"\n    \"path\/filepath\"\n    \"testing\"\n)\n\nfunc testouputfilecreated(t *testing.t) {\n    var infile = filepath.join(\"testdata\", \"correct.c\")\n    var outfile = filepath.join(\"testoutput\", \"correct_out\")\n\n    if err := compile(infile, outfile); err != nil {\n        t.errorf(\"expected err to be nil, got %s\", err.error())\n    }\n\n    if _, err := os.stat(outfile); os.isnotexist(err) {\n        t.error(\"expected output file to be created\")\n    }\n}\n\nfunc testouputfilenotcreatedforincorrectsource(t *testing.t) {\n    var infile = filepath.join(\"testdata\", \"wrong.c\")\n    var outfile = filepath.join(\"testoutput\", \"wrong_out\")\n\n    if err := compile(infile, outfile); err == nil {\n        t.errorf(\"expected err to be nil, got %v\", err)\n    }\n\n    if _, err := os.stat(outfile); os.isexist(err) {\n        t.error(\"expected output file to not be created\")\n    }\n}\n\nfunc testmain(m *testing.m) {\n    os.mkdir(\"testoutput\", 666)\n    code := m.run()\n    os.removeall(\"testoutput\")\n    os.exit(code)\n}<\/pre>\n
go test<\/code> \u8f93\u51fa\uff1a<\/p>\n
sriram@sriram-vostro-15:~\/go\/src\/github.com\/sriram-kailasam\/relab\/pkg\/gcc$ go test\n--- fail: testouputfilecreated (0.22s)\n        gcc_test.go:14: expected err to be nil, got exit status 1\nfail\nfail    github.com\/sriram-kailasam\/relab\/pkg\/gcc        0.257s<\/pre>\n
\u8fd0\u884c testmain<\/code>\uff1a<\/p>\n
Running tool: \/usr\/bin\/go test -timeout 30s github.com\/sriram-kailasam\/relab\/pkg\/gcc -run ^(TestMain)$\n\nok      github.com\/sriram-kailasam\/relab\/pkg\/gcc    0.001s [no tests to run]\nSuccess: Tests passed.<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u5f88\u53ef\u80fd\uff0c\u60a8\u7684\u95ee\u9898\u4e0e\u60a8\u4f20\u9012\u7ed9 os.mkdir(...)<\/code> \u7684 mode<\/em> \u503c\u6709\u5173\u3002\u60a8\u63d0\u4f9b\u7684\u662f 666<\/code> \u5341\u8fdb\u5236\uff0c\u5373 01232<\/code> \u516b\u8fdb\u5236\uff08\u6216\u8005\u5982\u679c\u60a8\u613f\u610f\uff0c\u53ef\u4ee5\u63d0\u4f9b d-w--wx-wt<\/code> \u7684\u6743\u9650<\/em>\u5b57\u7b26\u4e32\uff09\uff0c\u6211\u8ba4\u4e3a\u8fd9\u5e76\u4e0d\u662f\u60a8\u771f\u6b63\u60f3\u8981\u7684\u3002 <\/p>\n
\u60a8\u5e94\u8be5\u6307\u5b9a 0666<\/code>\uff0c\u800c\u4e0d\u662f 666<\/code> – \u524d\u5bfc 0 \u8868\u793a\u60a8\u7684\u503c\u91c7\u7528\u516b\u8fdb\u5236\u8868\u793a\u6cd5\u3002<\/p>\n
\u6b64\u5916\uff0c\u60a8\u7684\u4e24\u4e2a\u6d4b\u8bd5\u5b9e\u9645\u4e0a\u662f\u76f8\u540c\u7684\uff1b\u6211\u5efa\u8bae\u4f7f\u7528 *t.run(...)<\/code> \u4ece\u5355\u4e2a\u9876\u7ea7 test*<\/code> \u51fd\u6570\u6267\u884c\u6d4b\u8bd5\uff0c\u800c\u4e0d\u662f\u4f7f\u7528 testmain(...)<\/code> \u6765\u6267\u884c\u8bbe\u7f6e\u3002\u50cf\u8fd9\u6837\u7684\u4e8b\u60c5\uff1a<\/p>\n
gcc_test.go\uff1a<\/p>\n
package gcc\n\nimport (\n  \"testing\"\n  \"path\/filepath\"\n  \"os\"\n)\n\nconst testoutput = \"testoutput\"\n\ntype testcase struct {\n  infile  string\n  outfile string\n  err     error\n}\n\nfunc (tc *testcase) test(t *testing.t) {\n  var (\n    in  = filepath.join(\"testdata\", tc.infile)\n    out = filepath.join(testoutput, tc.outfile)\n  )\n\n  if err := compile(in, out); err != tc.err {\n    t.errorf(\"compile(%q, %q) == %v; wanted %v\", in, out, err, tc.err)\n  }\n}\n\nfunc testcompile(t *testing.t) {\n  os.mkdir(testoutput, 0666)\n\n  tests := map[string]*testcase{\n    \"correct\": &testcase{\"correct.c\", \"correct_out\", nil},\n    \"wrong\":   &testcase{\"wrong.c\", \"wrong_out\", expectederror},\n  }\n\n  for name, tc := range tests {\n    t.run(name, tc.test)\n  }\n}<\/pre>\n
#1<\/strong><\/p>\n
\u5c1d\u8bd5\u8fd0\u884c testmain()<\/code> \u5c31\u50cf\u5c1d\u8bd5\u8fd0\u884c main()<\/code> \u4e00\u6837\u3002\u4f60\u4e0d\u8fd9\u6837\u505a\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u4e3a\u4f60\u505a\u8fd9\u4ef6\u4e8b\u3002 <\/p>\n
 \u662f\u5728 go 1.4 \u4e2d\u5f15\u5165\u7684\uff0c\u7528\u4e8e\u5e2e\u52a9\u8bbe\u7f6e\/\u62c6\u5378\u6d4b\u8bd5\u73af\u5883\uff0c\u5e76\u88ab\u8c03\u7528\u800c\u4e0d\u662f\u8fd0\u884c\u6d4b\u8bd5\uff1b\u5f15\u7528\u53d1\u884c\u8bf4\u660e\uff1a<\/p>\n
#2<\/strong><\/p>\n
\u4f7f\u7528 ioutil.tempdir()<\/code> \u521b\u5efa\u4e34\u65f6\u76ee\u5f55\u3002<\/p>\n
tmpdir, err := ioutil.tempdir(\"\", \"test_output\")\nif err != nil {\n    \/\/ handle err\n}<\/pre>\n
\u5b83\u5c06\u8d1f\u8d23\u521b\u5efa\u76ee\u5f55\u3002\u60a8\u7a0d\u540e\u5e94\u8be5\u4f7f\u7528 os.remove(tmpdir)<\/code> \u5220\u9664\u4e34\u65f6\u76ee\u5f55\u3002<\/p>\n
\u60a8\u53ef\u4ee5\u5c06\u5176\u4e0e \u4e2d\u7684\u5efa\u8bae\u7684\u7a0d\u5fae\u4fee\u6539<\/em>\u7248\u672c\u4e00\u8d77\u4f7f\u7528\uff0c\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n
func TestCompile(t *testing.T) {\n    tmpDir, err := ioutil.TempDir(\"\", \"testdata\")\n    if err != nil {\n        t.Error(err)\n    }\n    defer os.Remove(tmpDir)\n\n    tests := []struct {\n        name, inFile, outFile string\n        err                   error\n    }{\n        {\"OutputFileCreated\", \"correct.c\", \"correct_out\", nil},\n        {\"OutputFileNotCreatedForIncorrectSource\", \"wrong.c\", \"wrong_out\", someErr},\n    }\n\n    for _, test := range tests {\n        var (\n            in  = filepath.Join(\"testdata\", test.inFile)\n            out = filepath.Join(tmpDir, test.outFile)\n        )\n\n        t.Run(test.name, func(t *testing.T) {\n            err = Compile(in, out)\n            if err != test.err {\n                t.Errorf(\"Compile(%q, %q) == %v; Wanted %v\", in, out, err, test.err)\n            }\n        })\n    }\n}<\/pre>\n
\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/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-207507","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207507","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=207507"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207507\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207507"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}