我正在編寫一個(gè)編譯 C 源文件并將輸出寫入另一個(gè)文件的包。我正在為這個(gè)包編寫測(cè)試，我需要?jiǎng)?chuàng)建一個(gè)臨時(shí)目錄來(lái)寫入輸出文件。我正在使用TestMain函數(shù)來(lái)做到這一點(diǎn)。出于某種原因，當(dāng)我剛剛運(yùn)行測(cè)試時(shí)，我總是收到“沒(méi)有要運(yùn)行的測(cè)試”的警告TestMain。我嘗試調(diào)試該TestMain函數(shù)，我可以看到確實(shí)創(chuàng)建了臨時(shí)目錄。當(dāng)我手動(dòng)創(chuàng)建testoutput目錄時(shí)，所有測(cè)試都通過(guò)了。我正在從目錄加載兩個(gè) C 源文件testdata，其中一個(gè)是故意錯(cuò)誤的。gcc.go：package gccimport (    "os/exec")func Compile(inPath, outPath string) error {    cmd := exec.Command("gcc", inPath, "-o", outPath)    return cmd.Run()}gcc_test.go：package gccimport (    "os"    "path/filepath"    "testing")func TestOuputFileCreated(t *testing.T) {    var inFile = filepath.Join("testdata", "correct.c")    var outFile = filepath.Join("testoutput", "correct_out")    if err := Compile(inFile, outFile); err != nil {        t.Errorf("Expected err to be nil, got %s", err.Error())    }    if _, err := os.Stat(outFile); os.IsNotExist(err) {        t.Error("Expected output file to be created")    }}func TestOuputFileNotCreatedForIncorrectSource(t *testing.T) {    var inFile = filepath.Join("testdata", "wrong.c")    var outFile = filepath.Join("testoutput", "wrong_out")    if err := Compile(inFile, outFile); err == nil {        t.Errorf("Expected err to be nil, got %v", err)    }    if _, err := os.Stat(outFile); os.IsExist(err) {        t.Error("Expected output file to not be created")    }}func TestMain(m *testing.M) {    os.Mkdir("testoutput", 666)    code := m.Run()    os.RemoveAll("testoutput")    os.Exit(code)}go test輸出：sriram@sriram-Vostro-15:~/go/src/github.com/sriram-kailasam/relab/pkg/gcc$ go test--- FAIL: TestOuputFileCreated (0.22s)        gcc_test.go:14: Expected err to be nil, got exit status 1FAILFAIL    github.com/sriram-kailasam/relab/pkg/gcc        0.257s運(yùn)行TestMain：Running tool: /usr/bin/go test -timeout 30s github.com/sriram-kailasam/relab/pkg/gcc -run ^(TestMain)$ok      github.com/sriram-kailasam/relab/pkg/gcc    0.001s [no tests to run]Success: Tests passed.