Agfdhyk

This code is executing commands for binary and return std.out and std.error

func exe(bin string, args string, path string) (string, error string) {



    cmd := exec.Command(bin, strings.Split(args, " ")...)

    cmd.Dir = path

    stdoutBuf := &bytes.Buffer{}

    cmd.Stdout = stdoutBuf

    stdErrBuf := &bytes.Buffer{}

    cmd.Stderr = stdErrBuf

    cmd.Run()

    return stdoutBuf.String(), stdErrBuf.String()

}

The problem that I don't know how to run a good test for it which will be supported in each system
e.g. if I try to run "echo" command the test run on Darwin and Linux but not on windows. how I should do it?

func Test_execute(t *testing.T) {

    type args struct {

        bin  string

        args string

        path string

    }

    tests := struct {

        name       string

        args       args

        wantString string

        wantError  string

    }{

        // TODO: Add test cases.

    }

    for _, tt := range tests {

        t.Run(tt.name, func(t *testing.T) {

            gotString, gotError := exe(tt.args.bin, tt.args.args, tt.args.path)

            if gotString != tt.wantString {

                t.Errorf("exe() gotString = %v, want %v", gotString, tt.wantString)

            }

            if gotError != tt.wantError {

                t.Errorf("exe() gotError = %v, want %v", gotError, tt.wantError)

            }

        })

    }

}

I've searched on it and found this,
https://www.joeshaw.org/testing-with-os-exec-and-testmain/
But now sure how to combine the env with my test...

Use Go build tags or file names. For example, for Linux and Windows:

a_linux_test.go (Linux file name):

package main



import "testing"



func TestLinuxA(t *testing.T) {

    t.Log("Linux A")

}

l_test.go (Linux build tag):

// +build linux



package main



import "testing"



func TestLinuxL(t *testing.T) {

    t.Log("Linux L")

}

a_windows_test.go (Windows file name):

package main



import "testing"



func TestWindowsA(t *testing.T) {

    t.Log("Windows A")

}

w_test.go (Windows build tag):

// +build windows



package main



import "testing"



func TestWindowsW(t *testing.T) {

    t.Log("Windows W")

}

Output (on Linux):

$ go test -v

=== RUN   TestLinuxA

--- PASS: TestLinuxA (0.00s)

    a_linux_test.go:6: Linux A

=== RUN   TestLinuxL

--- PASS: TestLinuxL (0.00s)

    l_test.go:8: Linux L

PASS

$ 

Output (on Windows):

>go test -v

=== RUN   TestWindowsA

--- PASS: TestWindowsA (0.00s)

    a_windows_test.go:6: Windows A

=== RUN   TestWindowsW

--- PASS: TestWindowsW (0.00s)

    w_test.go:8: Windows W

PASS

>

References:

Package build

Package testing

Command go