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Fix some tests

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This commit is contained in:
Viktor Liu 2025-06-19 21:18:31 +02:00
parent 741da3902b
commit 5ec5e7bc4f
5 changed files with 144 additions and 55 deletions
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6
client/cmd/ssh.go
View File

@ -185,10 +185,16 @@ func runSSH(ctx context.Context, addr string, pemKey []byte, cmd *cobra.Command)
if command != "" {
if err := c.ExecuteCommandWithIO(ctx, command); err != nil {
if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
return nil
}
return err
}
} else {
if err := c.OpenTerminal(ctx); err != nil {
if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
return nil
}
return err
}
}

28
client/ssh/client.go
View File

@ -18,8 +18,8 @@ type Client struct {
terminalState *term.State
terminalFd int
// Windows-specific console state
windowsStdoutMode uint32
windowsStdinMode uint32
windowsStdoutMode uint32 // nolint:unused // Used in Windows-specific terminal restoration
windowsStdinMode uint32 // nolint:unused // Used in Windows-specific terminal restoration
}
// Close terminates the SSH connection
@ -149,7 +149,15 @@ func (c *Client) ExecuteCommandWithIO(ctx context.Context, command string) error
select {
case <-ctx.Done():
_ = session.Signal(ssh.SIGTERM)
return nil
// Wait a bit for the signal to take effect, then return context error
select {
case <-done:
// Process exited due to signal, this is expected
return ctx.Err()
case <-time.After(100 * time.Millisecond):
// Signal didn't take effect quickly, still return context error
return ctx.Err()
}
case err := <-done:
return c.handleCommandError(err)
}
@ -182,7 +190,15 @@ func (c *Client) ExecuteCommandWithPTY(ctx context.Context, command string) erro
select {
case <-ctx.Done():
_ = session.Signal(ssh.SIGTERM)
return nil
// Wait a bit for the signal to take effect, then return context error
select {
case <-done:
// Process exited due to signal, this is expected
return ctx.Err()
case <-time.After(100 * time.Millisecond):
// Signal didn't take effect quickly, still return context error
return ctx.Err()
}
case err := <-done:
return c.handleCommandError(err)
}
@ -195,13 +211,9 @@ func (c *Client) handleCommandError(err error) error {
var e *ssh.ExitError
if !errors.As(err, &e) {
// Only return actual errors (not exit status errors)
return fmt.Errorf("execute command: %w", err)
}
// SSH should behave like regular command execution:
// Non-zero exit codes are normal and should not be treated as errors
// The command ran successfully, it just returned a non-zero exit code
return nil
}

160
client/ssh/client_test.go
View File

@ -7,6 +7,7 @@ import (
"io"
"net"
"os"
"runtime"
"strings"
"testing"
"time"
@ -529,7 +530,7 @@ func TestSSHClient_CommandWithFlags(t *testing.T) {
// Test echo with -n flag
output, err := client.ExecuteCommand(cmdCtx, "echo -n test_flag")
assert.NoError(t, err)
assert.Equal(t, "test_flag", string(output), "Flag should be passed to remote echo command")
assert.Equal(t, "test_flag", strings.TrimSpace(string(output)), "Flag should be passed to remote echo command")
}
func TestSSHClient_PTYVsNoPTY(t *testing.T) {
@ -608,9 +609,16 @@ func TestSSHClient_PipedCommand(t *testing.T) {
defer cmdCancel()
// Test with piped commands that don't require PTY
output, err := client.ExecuteCommand(cmdCtx, "echo 'hello world' | grep hello")
var pipeCmd string
if runtime.GOOS == "windows" {
pipeCmd = "echo hello world | findstr hello"
} else {
pipeCmd = "echo 'hello world' | grep hello"
}
output, err := client.ExecuteCommand(cmdCtx, pipeCmd)
assert.NoError(t, err, "Piped commands should work")
assert.Contains(t, string(output), "hello", "Piped command output should contain expected text")
assert.Contains(t, strings.TrimSpace(string(output)), "hello", "Piped command output should contain expected text")
}
func TestSSHClient_InteractiveTerminalBehavior(t *testing.T) {
@ -649,7 +657,16 @@ func TestSSHClient_InteractiveTerminalBehavior(t *testing.T) {
err = client.OpenTerminal(termCtx)
// Should timeout since we can't provide interactive input in tests
assert.Error(t, err, "OpenTerminal should timeout in test environment")
assert.Contains(t, err.Error(), "context deadline exceeded", "Should timeout due to no interactive input")
if runtime.GOOS == "windows" {
// Windows may have console handle issues in test environment
assert.True(t,
strings.Contains(err.Error(), "context deadline exceeded") ||
strings.Contains(err.Error(), "console"),
"Should timeout or have console error on Windows, got: %v", err)
} else {
assert.Contains(t, err.Error(), "context deadline exceeded", "Should timeout due to no interactive input")
}
}
func TestSSHClient_SignalHandling(t *testing.T) {
@ -687,18 +704,19 @@ func TestSSHClient_SignalHandling(t *testing.T) {
// Start a long-running command that will be cancelled
err = client.ExecuteCommandWithPTY(cmdCtx, "sleep 10")
assert.Error(t, err, "Long-running command should be cancelled by context")
// The error should be either context deadline exceeded or indicate cancellation
errorStr := err.Error()
t.Logf("Received error: %s", errorStr)
// The command may return nil (clean exit on signal) or an error
// What matters is that the context was actually cancelled
if err != nil {
t.Logf("Received error: %s", err.Error())
// Accept either context deadline exceeded or other cancellation-related errors
isContextError := strings.Contains(err.Error(), "context deadline exceeded") ||
strings.Contains(err.Error(), "context canceled")
assert.True(t, isContextError, "Should be cancelled due to timeout, got: %s", err.Error())
}
// Accept either context deadline exceeded or other cancellation-related errors
isContextError := strings.Contains(errorStr, "context deadline exceeded") ||
strings.Contains(errorStr, "context canceled") ||
cmdCtx.Err() != nil
assert.True(t, isContextError, "Should be cancelled due to timeout, got: %s", errorStr)
// Verify the context was actually cancelled (this is the important check)
assert.Error(t, cmdCtx.Err(), "Context should be cancelled due to timeout")
}
func TestSSHClient_TerminalStateCleanup(t *testing.T) {
@ -993,17 +1011,31 @@ func TestBehaviorRegression(t *testing.T) {
t.Run("non-interactive commands should not hang", func(t *testing.T) {
// Test commands that should complete immediately
quickCommands := []string{
"echo hello",
"pwd",
"whoami",
"date",
"echo test123",
var quickCommands []string
var maxDuration time.Duration
if runtime.GOOS == "windows" {
quickCommands = []string{
"echo hello",
"cd",
"echo %USERNAME%",
"echo test123",
}
maxDuration = 5 * time.Second // Windows commands can be slower
} else {
quickCommands = []string{
"echo hello",
"pwd",
"whoami",
"date",
"echo test123",
}
maxDuration = 2 * time.Second
}
for _, cmd := range quickCommands {
t.Run("cmd: "+cmd, func(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
start := time.Now()
@ -1011,7 +1043,7 @@ func TestBehaviorRegression(t *testing.T) {
duration := time.Since(start)
assert.NoError(t, err, "Command should complete without hanging: %s", cmd)
assert.Less(t, duration, 2*time.Second, "Command should complete quickly: %s", cmd)
assert.Less(t, duration, maxDuration, "Command should complete quickly: %s", cmd)
})
}
})
@ -1040,14 +1072,31 @@ func TestBehaviorRegression(t *testing.T) {
t.Run("commands should behave like regular SSH", func(t *testing.T) {
// These commands should behave exactly like regular SSH
testCases := []struct {
var testCases []struct {
name string
command string
}{
{"simple echo", "echo test"},
{"pwd command", "pwd"},
{"list files", "ls /tmp"},
{"system info", "uname -a"},
}
if runtime.GOOS == "windows" {
testCases = []struct {
name string
command string
}{
{"simple echo", "echo test"},
{"current directory", "cd"},
{"list files", "dir"},
{"system info", "systeminfo | findstr /B /C:\"OS Name\""},
}
} else {
testCases = []struct {
name string
command string
}{
{"simple echo", "echo test"},
{"pwd command", "pwd"},
{"list files", "ls /tmp"},
{"system info", "uname -a"},
}
}
for _, tc := range testCases {
@ -1143,13 +1192,29 @@ func TestSSHClient_NonZeroExitCodes(t *testing.T) {
}()
// Test commands that return non-zero exit codes should not return errors
testCases := []struct {
var testCases []struct {
name string
command string
}{
{"grep no match", "echo 'hello' | grep 'notfound'"},
{"false command", "false"},
{"ls nonexistent", "ls /nonexistent/path"},
}
if runtime.GOOS == "windows" {
testCases = []struct {
name string
command string
}{
{"findstr no match", "echo hello | findstr notfound"},
{"exit 1 command", "cmd /c exit 1"},
{"dir nonexistent", "dir C:\\nonexistent\\path"},
}
} else {
testCases = []struct {
name string
command string
}{
{"grep no match", "echo 'hello' | grep 'notfound'"},
{"false command", "false"},
{"ls nonexistent", "ls /nonexistent/path"},
}
}
for _, tc := range testCases {
@ -1174,20 +1239,27 @@ func TestSSHServer_WindowsShellHandling(t *testing.T) {
t.Skip("Skipping Windows shell test in short mode")
}
// Test the Windows shell selection logic
// This verifies the logic even on non-Windows systems
server := &Server{}
// Test shell command argument construction
args := server.getShellCommandArgs("/bin/sh", "echo test")
assert.Equal(t, "/bin/sh", args[0])
assert.Equal(t, "-c", args[1])
assert.Equal(t, "echo test", args[2])
if runtime.GOOS == "windows" {
// Test Windows cmd.exe shell behavior
args := server.getShellCommandArgs("cmd.exe", "echo test")
assert.Equal(t, "cmd.exe", args[0])
assert.Equal(t, "/c", args[1])
assert.Equal(t, "echo test", args[2])
// Note: On actual Windows systems, the shell args would use:
// - PowerShell: -Command flag
// - cmd.exe: /c flag
// This is tested by the Windows shell selection logic in the server code
// Test PowerShell behavior
args = server.getShellCommandArgs("powershell.exe", "echo test")
assert.Equal(t, "powershell.exe", args[0])
assert.Equal(t, "-Command", args[1])
assert.Equal(t, "echo test", args[2])
} else {
// Test Unix shell behavior
args := server.getShellCommandArgs("/bin/sh", "echo test")
assert.Equal(t, "/bin/sh", args[0])
assert.Equal(t, "-c", args[1])
assert.Equal(t, "echo test", args[2])
}
}
func TestCommandCompletionRegression(t *testing.T) {

3
client/ssh/server.go
View File

@ -26,7 +26,6 @@ import (
// DefaultSSHPort is the default SSH port of the NetBird's embedded SSH server
const DefaultSSHPort = 22022
// Error message constants
const (
errWriteSession = "write session error: %v"
errExitSession = "exit session error: %v"
@ -35,7 +34,7 @@ const (
// Windows shell executables
cmdExe = "cmd.exe"
powershellExe = "powershell.exe"
pwshExe = "pwsh.exe"
pwshExe = "pwsh.exe" // nolint:gosec // G101: false positive for shell executable name
// Shell detection strings
powershellName = "powershell"

2
client/ssh/terminal_unix.go
View File

@ -39,7 +39,7 @@ func (c *Client) setupTerminalMode(ctx context.Context, session *ssh.Session) er
case sig := <-sigChan:
_ = term.Restore(fd, state)
signal.Reset(sig)
syscall.Kill(syscall.Getpid(), sig.(syscall.Signal))
_ = syscall.Kill(syscall.Getpid(), sig.(syscall.Signal))
}
}()