github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/gmtls/link_test.go (about)

     1  // Copyright 2022 s1ren@github.com/hxx258456.
     2  
     3  /*
     4  gmtls是基于`golang/go`的`tls`包实现的国密改造版本。
     5  对应版权声明: thrid_licenses/github.com/golang/go/LICENSE
     6  */
     7  
     8  package gmtls
     9  
    10  import (
    11  	"bytes"
    12  	"os"
    13  	"os/exec"
    14  	"path/filepath"
    15  	"testing"
    16  
    17  	"github.com/hxx258456/ccgo/internal/testenv"
    18  )
    19  
    20  // Tests that the linker is able to remove references to the Client or Server if unused.
    21  func TestLinkerGC(t *testing.T) {
    22  	if testing.Short() {
    23  		t.Skip("skipping in short mode")
    24  	}
    25  	t.Parallel()
    26  	goBin := testenv.GoToolPath(t)
    27  	testenv.MustHaveGoBuild(t)
    28  
    29  	tests := []struct {
    30  		name    string
    31  		program string
    32  		want    []string
    33  		bad     []string
    34  	}{
    35  		{
    36  			name: "empty_import",
    37  			program: `package main
    38  import _ "crypto/tls"
    39  func main() {}
    40  `,
    41  			bad: []string{
    42  				"tls.(*Conn)",
    43  				"type.crypto/tls.clientHandshakeState",
    44  				"type.crypto/tls.serverHandshakeState",
    45  			},
    46  		},
    47  		{
    48  			name: "client_and_server",
    49  			program: `package main
    50  import "crypto/tls"
    51  func main() {
    52    tls.Dial("", "", nil)
    53    tls.Server(nil, nil)
    54  }
    55  `,
    56  			want: []string{
    57  				"crypto/tls.(*Conn).clientHandshake",
    58  				"crypto/tls.(*Conn).serverHandshake",
    59  			},
    60  		},
    61  		{
    62  			name: "only_client",
    63  			program: `package main
    64  import "crypto/tls"
    65  func main() { tls.Dial("", "", nil) }
    66  `,
    67  			want: []string{
    68  				"crypto/tls.(*Conn).clientHandshake",
    69  			},
    70  			bad: []string{
    71  				"crypto/tls.(*Conn).serverHandshake",
    72  			},
    73  		},
    74  		// TODO: add only_server like func main() { tls.Server(nil, nil) }
    75  		// That currently brings in the client via Conn.handleRenegotiation.
    76  
    77  	}
    78  	tmpDir := t.TempDir()
    79  	goFile := filepath.Join(tmpDir, "x.go")
    80  	exeFile := filepath.Join(tmpDir, "x.exe")
    81  	for _, tt := range tests {
    82  		t.Run(tt.name, func(t *testing.T) {
    83  			if err := os.WriteFile(goFile, []byte(tt.program), 0644); err != nil {
    84  				t.Fatal(err)
    85  			}
    86  			_ = os.Remove(exeFile)
    87  			cmd := exec.Command(goBin, "build", "-o", "x.exe", "x.go")
    88  			cmd.Dir = tmpDir
    89  			if out, err := cmd.CombinedOutput(); err != nil {
    90  				t.Fatalf("compile: %v, %s", err, out)
    91  			}
    92  
    93  			cmd = exec.Command(goBin, "tool", "nm", "x.exe")
    94  			cmd.Dir = tmpDir
    95  			nm, err := cmd.CombinedOutput()
    96  			if err != nil {
    97  				t.Fatalf("nm: %v, %s", err, nm)
    98  			}
    99  			for _, sym := range tt.want {
   100  				if !bytes.Contains(nm, []byte(sym)) {
   101  					t.Errorf("expected symbol %q not found", sym)
   102  				}
   103  			}
   104  			for _, sym := range tt.bad {
   105  				if bytes.Contains(nm, []byte(sym)) {
   106  					t.Errorf("unexpected symbol %q found", sym)
   107  				}
   108  			}
   109  		})
   110  	}
   111  }