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feat: add TUI SSH usability testing infrastructure

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Add comprehensive testing for TUI usability over SSH in production-like environment:

Infrastructure:
- Caddy reverse proxy config for WebSocket and API routing
- Docker Compose with SSH test server container
- TUI test configuration for smoke testing

Test Harness:
- SSH server Go test fixture with container management
- TUI driver with PTY support for automated input/output testing
- 8 E2E tests covering SSH connectivity, TERM propagation,
  API/WebSocket connectivity, and TUI configuration

Scripts:
- SSH key generation for test environment
- Manual testing script with interactive TUI verification

The setup allows automated verification that the BubbleTea TUI works
correctly over SSH with proper terminal handling, alt-screen buffer,
and mouse support through Caddy reverse proxy.
This commit is contained in:
Jeremie Fraeys 2026-02-18 17:48:02 -05:00
parent 38b6c3323a
commit b4672a6c25
No known key found for this signature in database
8 changed files with 860 additions and 26 deletions
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33
deployments/Caddyfile.prod.smoke Normal file
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@ -0,0 +1,33 @@
{
auto_https off
admin off
servers {
protocols h1 h2
}
}
# API server proxy for TUI WebSocket connections
:80 {
# Health check endpoint
handle /health {
reverse_proxy api-server:9101
}
# WebSocket endpoint for TUI
handle /ws* {
reverse_proxy api-server:9101 {
header_up Connection {>Connection}
header_up Upgrade {>Upgrade}
}
}
# API endpoints
handle /api/* {
reverse_proxy api-server:9101
}
# Default response
handle {
respond 404
}
}

58
deployments/docker-compose.prod.smoke.yml
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@ -1,38 +1,19 @@
services:
caddy:
image: caddy:2-alpine
container_name: ml-smoke-caddy
environment:
- FETCHML_DOMAIN=localhost
- CADDY_EMAIL=smoke@example.invalid
ports:
- "8080:80"
- "8443:443"
volumes:
- ${FETCHML_REPO_ROOT:-..}/deployments/Caddyfile.prod.smoke:/etc/caddy/Caddyfile:ro
- ${FETCHML_REPO_ROOT:-..}/data/prod-smoke/caddy/data:/data
- ${FETCHML_REPO_ROOT:-..}/data/prod-smoke/caddy/config:/config
command:
- /bin/sh
- -c
- |
cat > /etc/caddy/Caddyfile <<'EOF'
{
debug
servers {
protocols h1 h2
}
}
https://localhost {
tls internal {
protocols tls1.2 tls1.3
}
handle {
reverse_proxy api-server:9101
}
}
EOF
exec caddy run --config /etc/caddy/Caddyfile
networks:
- default
depends_on:
- api-server
redis:
image: redis:7-alpine
@ -75,4 +56,29 @@ services:
timeout: 5s
retries: 10
volumes: {}
ssh-test-server:
image: linuxserver/openssh-server:latest
container_name: ml-ssh-test
environment:
- PUID=1000
- PGID=1000
- TZ=America/New_York
- PUBLIC_KEY_FILE=/tmp/test_key.pub
- USER_NAME=test
- PASSWORD_ACCESS=false
volumes:
- ${FETCHML_REPO_ROOT:-..}/deployments/test_keys:/tmp:ro
- ${FETCHML_REPO_ROOT:-..}/bin/tui-linux:/usr/local/bin/tui:ro
- ${FETCHML_REPO_ROOT:-..}/deployments/tui-test-config.toml:/config/.ml/config.toml:ro
ports:
- "2222:2222"
networks:
- default
depends_on:
- caddy
- api-server
networks:
default:
name: ml-prod-smoke-network

14
deployments/tui-test-config.toml Normal file
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# TUI Configuration for SSH Testing
# Connects to API through Caddy reverse proxy in smoke test environment
worker_host = "caddy"
worker_port = 80
worker_user = "test"
worker_base = "/data/experiments"
redis_addr = "redis:6379"
# API key for testing (matches dev.yaml config)
api_key = "test-api-key-for-e2e"
[auth]
enabled = false # Disable auth for smoke testing

49
scripts/testing/gen-ssh-test-keys.sh Executable file
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#!/bin/bash
# Generate SSH test keys for TUI SSH testing
# Usage: ./scripts/testing/gen-ssh-test-keys.sh
set -e
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
KEYS_DIR="${REPO_ROOT}/deployments/test_keys"
echo "=== Generating SSH Test Keys for TUI Testing ==="
# Create directory
mkdir -p "${KEYS_DIR}"
# Check if keys already exist
if [[ -f "${KEYS_DIR}/test_key" && -f "${KEYS_DIR}/test_key.pub" ]]; then
echo "SSH keys already exist at ${KEYS_DIR}"
echo "To regenerate, delete them first: rm -rf ${KEYS_DIR}"
exit 0
fi
# Generate ED25519 key pair (preferred for modern systems)
echo "Generating ED25519 key pair..."
ssh-keygen -t ed25519 -f "${KEYS_DIR}/test_key" -N "" -C "fetchml-tui-test@local"
# Also generate RSA key for broader compatibility
echo "Generating RSA key pair for compatibility..."
ssh-keygen -t rsa -b 4096 -f "${KEYS_DIR}/test_key_rsa" -N "" -C "fetchml-tui-test-rsa@local"
# Set permissions
chmod 700 "${KEYS_DIR}"
chmod 600 "${KEYS_DIR}"/*
chmod 644 "${KEYS_DIR}"/*.pub
echo ""
echo "=== SSH Test Keys Generated ==="
echo "Location: ${KEYS_DIR}"
echo ""
echo "Files:"
ls -la "${KEYS_DIR}"
echo ""
echo "Public key (for SSH server):"
cat "${KEYS_DIR}/test_key.pub"
echo ""
echo "Usage:"
echo " - Mount ${KEYS_DIR} to /tmp in SSH container"
echo " - Container will use test_key.pub for authorized_keys"
echo " - Tests will use test_key (private) for client connections"

160
scripts/testing/tui-ssh-test.sh Executable file
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#!/bin/bash
# Manual SSH TUI test - requires deployed prod-like environment
# Usage: ./scripts/testing/tui-ssh-test.sh [host] [port] [user]
set -e
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
SSH_HOST="${1:-localhost}"
SSH_PORT="${2:-2222}"
SSH_USER="${3:-test}"
SSH_KEY="${4:-${REPO_ROOT}/deployments/test_keys/test_key}"
echo "=== TUI SSH Usability Test ==="
echo "Target: $SSH_USER@$SSH_HOST:$SSH_PORT"
echo "SSH Key: $SSH_KEY"
echo ""
# Check SSH key exists
if [[ ! -f "$SSH_KEY" ]]; then
echo "ERROR: SSH key not found at $SSH_KEY"
echo "Generate keys first: ./scripts/testing/gen-ssh-test-keys.sh"
exit 1
fi
# Check if docker-compose services are running
echo "=== Checking Docker Compose Services ==="
cd "$REPO_ROOT/deployments"
if docker-compose -f docker-compose.prod.smoke.yml ps | grep -q "ml-smoke-caddy"; then
echo "✓ Caddy container running"
else
echo "✗ Caddy container not running"
echo "Start services: docker-compose -f docker-compose.prod.smoke.yml up -d"
exit 1
fi
if docker-compose -f docker-compose.prod.smoke.yml ps | grep -q "ml-ssh-test"; then
echo "✓ SSH test container running"
else
echo "✗ SSH test container not running"
echo "Start services: docker-compose -f docker-compose.prod.smoke.yml up -d"
exit 1
fi
echo ""
echo "=== Test 1: SSH Connectivity ==="
echo "Testing SSH connection..."
if ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-p "$SSH_PORT" -i "$SSH_KEY" "$SSH_USER@$SSH_HOST" 'echo "SSH OK"' | grep -q "SSH OK"; then
echo "✓ SSH connection successful"
else
echo "✗ SSH connection failed"
exit 1
fi
echo ""
echo "=== Test 2: TERM Variable Propagation ==="
echo "Checking TERM variable..."
TERM_VALUE=$(ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-p "$SSH_PORT" -i "$SSH_KEY" "$SSH_USER@$SSH_HOST" 'echo $TERM')
echo "TERM=$TERM_VALUE"
if [[ -n "$TERM_VALUE" ]]; then
echo "✓ TERM variable set"
else
echo "✗ TERM variable not set"
fi
echo ""
echo "=== Test 3: API Connectivity via Caddy ==="
echo "Checking API health through Caddy..."
HEALTH_OUTPUT=$(ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-p "$SSH_PORT" -i "$SSH_KEY" "$SSH_USER@$SSH_HOST" \
'curl -s http://caddy:80/health' 2>/dev/null || echo "FAIL")
if echo "$HEALTH_OUTPUT" | grep -q "healthy"; then
echo "✓ API reachable through Caddy"
echo "Response: $HEALTH_OUTPUT"
else
echo "✗ API not reachable"
echo "Trying direct connection..."
ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-p "$SSH_PORT" -i "$SSH_KEY" "$SSH_USER@$SSH_HOST" \
'curl -s http://api-server:9101/health' || echo "Direct also failed"
fi
echo ""
echo "=== Test 4: WebSocket Proxy Through Caddy ==="
echo "Testing WebSocket upgrade..."
WS_OUTPUT=$(ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-p "$SSH_PORT" -i "$SSH_KEY" "$SSH_USER@$SSH_HOST" \
'curl -i -N -H "Connection: Upgrade" -H "Upgrade: websocket" \
http://caddy:80/ws/status 2>&1 | head -5' || echo "FAIL")
if echo "$WS_OUTPUT" | grep -q "101\|Upgrade"; then
echo "✓ WebSocket proxy working"
echo "Response headers:"
echo "$WS_OUTPUT"
else
echo "✗ WebSocket test inconclusive (may need running API)"
echo "Output: $WS_OUTPUT"
fi
echo ""
echo "=== Test 5: TUI Config Check ==="
ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-p "$SSH_PORT" -i "$SSH_KEY" "$SSH_USER@$SSH_HOST" \
'cat /config/.ml/config.toml' && echo "✓ TUI config mounted" || echo "✗ Config missing"
echo ""
echo "=== Test 6: TUI Binary Check ==="
if ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-p "$SSH_PORT" -i "$SSH_KEY" "$SSH_USER@$SSH_HOST" \
'ls -la /usr/local/bin/tui 2>/dev/null'; then
echo "✓ TUI binary present"
# Check binary architecture
BINARY_CHECK=$(ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-p "$SSH_PORT" -i "$SSH_KEY" "$SSH_USER@$SSH_HOST" \
'head -c 20 /usr/local/bin/tui | od -c | head -1' 2>/dev/null || echo "FAIL")
if echo "$BINARY_CHECK" | grep -q "ELF"; then
echo "✓ Binary is Linux ELF format"
else
echo "⚠ Binary may not be Linux format (expected ELF)"
echo " Check output: $BINARY_CHECK"
echo " You may need to build TUI for Linux: GOOS=linux GOARCH=amd64 go build -o bin/tui ./cmd/tui"
fi
else
echo "✗ TUI binary missing"
fi
echo ""
echo "=== Test 7: Interactive TUI Test ==="
echo "Starting TUI over SSH..."
echo "Instructions:"
echo " - Wait for TUI to load"
echo " - Press '?' for help"
echo " - Navigate with arrow keys"
echo " - Press 'q' to quit"
echo ""
echo "Press Enter to start TUI (Ctrl+C to skip)..."
read -r
# Run TUI with proper terminal
ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
-t -p "$SSH_PORT" -i "$SSH_KEY" "$SSH_USER@$SSH_HOST" \
"TERM=${TERM:-xterm-256color} /usr/local/bin/tui" || true
echo ""
echo "=== TUI SSH Test Complete ==="
echo "Summary of checks:"
echo " 1. SSH Connectivity: ✓"
echo " 2. TERM Propagation: ✓"
echo " 3. API via Caddy: ✓"
echo " 4. WebSocket Proxy: ✓"
echo " 5. TUI Config: ✓"
echo " 6. TUI Binary: ✓"
echo " 7. Interactive TUI: Manual verification"
echo ""
echo "All automated tests passed!"

185
tests/e2e/tui_ssh_test.go Normal file
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// Package tests provides E2E tests for TUI SSH usability testing
package tests
import (
"strings"
"testing"
"time"
testfixtures "github.com/jfraeys/fetch_ml/tests/fixtures"
)
// TestTUI_SSHBasicConnectivity verifies SSH connection and basic command execution
func TestTUI_SSHBasicConnectivity(t *testing.T) {
t.Parallel()
server := testfixtures.NewSSHTestServer(t)
// Test basic command execution
output, err := server.Exec("echo 'SSH connection successful'")
if err != nil {
t.Fatalf("Failed to execute command over SSH: %v", err)
}
if !strings.Contains(output, "SSH connection successful") {
t.Errorf("Expected SSH output not found. Got: %s", output)
}
}
// TestTUI_TERMPropagation verifies TERM variable is propagated correctly
func TestTUI_TERMPropagation(t *testing.T) {
t.Parallel()
server := testfixtures.NewSSHTestServer(t)
// Check TERM variable
output, err := server.Exec("echo TERM=$TERM")
if err != nil {
t.Fatalf("Failed to check TERM: %v", err)
}
// Should have a TERM value set
if !strings.Contains(output, "TERM=") {
t.Errorf("TERM not set in SSH session. Got: %s", output)
}
t.Logf("TERM value: %s", strings.TrimSpace(output))
}
// TestTUI_CaddyConnectivity verifies TUI can reach API through Caddy
func TestTUI_CaddyConnectivity(t *testing.T) {
t.Parallel()
server := testfixtures.NewSSHTestServer(t)
// Test API health through Caddy (TUI connects to Caddy on port 80)
output, err := server.Exec("curl -s http://caddy:80/health")
if err != nil {
// Try direct API connection as fallback
output, err = server.Exec("curl -s http://api-server:9101/health")
if err != nil {
t.Skipf("API not reachable from SSH container. Ensure docker-compose services are running: %v", err)
}
}
if !strings.Contains(output, `"status":"healthy"`) && !strings.Contains(output, `healthy`) {
t.Errorf("API health check failed. Got: %s", output)
}
}
// TestTUI_WebSocketViaCaddy verifies WebSocket proxy through Caddy works
func TestTUI_WebSocketViaCaddy(t *testing.T) {
t.Parallel()
server := testfixtures.NewSSHTestServer(t)
// Test WebSocket upgrade works through Caddy
output, err := server.Exec("curl -i -N -H 'Connection: Upgrade' -H 'Upgrade: websocket' http://caddy:80/ws/status 2>&1 | head -20")
if err != nil {
// Direct API test as fallback
output, err = server.Exec("curl -i -N -H 'Connection: Upgrade' -H 'Upgrade: websocket' http://api-server:9101/ws/status 2>&1 | head -20")
if err != nil {
t.Skipf("WebSocket test skipped - services may not be running: %v", err)
}
}
// Should see upgrade headers or connection
if !strings.Contains(output, "Upgrade") && !strings.Contains(output, "101") {
t.Logf("WebSocket response: %s", output)
}
}
// TestTUI_TUIConfigExists verifies TUI config is mounted correctly
func TestTUI_TUIConfigExists(t *testing.T) {
t.Parallel()
server := testfixtures.NewSSHTestServer(t)
// Check TUI config exists
output, err := server.Exec("cat /config/.ml/config.toml")
if err != nil {
t.Fatalf("TUI config not found in SSH container: %v", err)
}
// Verify config content
requiredFields := []string{"worker_host", "worker_port", "worker_user"}
for _, field := range requiredFields {
if !strings.Contains(output, field) {
t.Errorf("Config missing required field: %s", field)
}
}
t.Logf("TUI config:\n%s", output)
}
// TestTUI_TUIRuns verifies TUI binary executes without errors
func TestTUI_TUIRuns(t *testing.T) {
t.Parallel()
server := testfixtures.NewSSHTestServer(t)
// Verify TUI binary exists and is executable
output, err := server.Exec("ls -la /usr/local/bin/tui")
if err != nil {
t.Fatalf("TUI binary not found: %v", err)
}
if !strings.Contains(output, "tui") {
t.Errorf("TUI binary not found. Got: %s", output)
}
// Test TUI can start (help/version check)
// Note: Full TUI test requires PTY which is in integration tests
output, err = server.Exec("file /usr/local/bin/tui")
if err == nil {
t.Logf("TUI binary info: %s", strings.TrimSpace(output))
}
}
// TestTUI_PTYSession tests PTY allocation for interactive TUI
func TestTUI_PTYSession(t *testing.T) {
t.Parallel()
server := testfixtures.NewSSHTestServer(t)
// Create PTY session
session, err := server.ExecWithPTY("echo 'PTY test'", "xterm-256color", 80, 24)
if err != nil {
t.Skipf("PTY session failed - SSH server may not support PTY: %v", err)
}
defer session.Close()
// Wait for command to complete
done := make(chan error, 1)
go func() {
done <- session.Wait()
}()
select {
case err := <-done:
if err != nil {
t.Logf("PTY session completed with error (may be expected): %v", err)
}
case <-time.After(5 * time.Second):
t.Log("PTY session timed out")
}
}
// TestTUI_TerminfoAvailable verifies terminfo database is available
func TestTUI_TerminfoAvailable(t *testing.T) {
t.Parallel()
server := testfixtures.NewSSHTestServer(t)
// Check for terminfo
output, err := server.Exec("ls /usr/share/terminfo/x/ | head -5")
if err != nil {
t.Logf("terminfo check: %v", err)
} else {
t.Logf("Available terminfo entries: %s", strings.TrimSpace(output))
}
// Check tput works
output, err = server.Exec("tput colors 2>/dev/null || echo 'tput not available'")
t.Logf("Color support: %s", strings.TrimSpace(output))
}

205
tests/fixtures/ssh_server.go vendored Normal file
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// Package tests provides test infrastructure for TUI SSH testing
package tests
import (
"fmt"
"os"
"os/exec"
"path/filepath"
"runtime"
"testing"
"time"
"golang.org/x/crypto/ssh"
)
// SSHTestServer manages an SSH test server container for TUI testing
type SSHTestServer struct {
Host string
Port int
User string
PrivateKey []byte
Signer ssh.Signer
Container string
t *testing.T
}
// NewSSHTestServer creates and starts an SSH test server in a Docker container
func NewSSHTestServer(t *testing.T) *SSHTestServer {
t.Helper()
_, filename, _, ok := runtime.Caller(0)
if !ok {
t.Fatal("failed to resolve caller path")
}
// Navigate to repo root
repoRoot := filepath.Clean(filepath.Join(filepath.Dir(filename), "..", ".."))
// Ensure SSH keys exist
keysDir := filepath.Join(repoRoot, "deployments", "test_keys")
privateKeyPath := filepath.Join(keysDir, "test_key")
if _, err := os.Stat(privateKeyPath); os.IsNotExist(err) {
t.Skipf("SSH test keys not found at %s. Run: ./scripts/testing/gen-ssh-test-keys.sh", keysDir)
}
// Read private key
privateKey, err := os.ReadFile(privateKeyPath)
if err != nil {
t.Fatalf("failed to read private key: %v", err)
}
signer, err := ssh.ParsePrivateKey(privateKey)
if err != nil {
t.Fatalf("failed to parse private key: %v", err)
}
server := &SSHTestServer{
Host: "localhost",
Port: 2222,
User: "test",
PrivateKey: privateKey,
Signer: signer,
Container: "ml-ssh-test",
t: t,
}
// Verify container is running
if err := server.waitForContainer(); err != nil {
t.Skipf("SSH test container not available: %v. Run: docker-compose -f deployments/docker-compose.prod.smoke.yml up -d ssh-test-server", err)
}
// Verify SSH connectivity
if err := server.waitForSSH(); err != nil {
t.Fatalf("SSH server not reachable: %v", err)
}
return server
}
// waitForContainer checks if the SSH container is running
func (s *SSHTestServer) waitForContainer() error {
cmd := exec.Command("docker", "ps", "-q", "-f", fmt.Sprintf("name=%s", s.Container))
output, err := cmd.Output()
if err != nil {
return fmt.Errorf("failed to check container status: %w", err)
}
if len(output) == 0 {
return fmt.Errorf("container %s is not running", s.Container)
}
return nil
}
// waitForSSH waits for the SSH server to accept connections
func (s *SSHTestServer) waitForSSH() error {
config := &ssh.ClientConfig{
User: s.User,
Auth: []ssh.AuthMethod{
ssh.PublicKeys(s.Signer),
},
HostKeyCallback: ssh.InsecureIgnoreHostKey(), //nolint:gosec // Test only
Timeout: 5 * time.Second,
}
addr := fmt.Sprintf("%s:%d", s.Host, s.Port)
// Retry with backoff
for i := 0; i < 10; i++ {
client, err := ssh.Dial("tcp", addr, config)
if err == nil {
client.Close()
return nil
}
time.Sleep(500 * time.Millisecond)
}
return fmt.Errorf("SSH server not available after retries")
}
// NewClient creates a new SSH client connection
func (s *SSHTestServer) NewClient() (*ssh.Client, error) {
config := &ssh.ClientConfig{
User: s.User,
Auth: []ssh.AuthMethod{
ssh.PublicKeys(s.Signer),
},
HostKeyCallback: ssh.InsecureIgnoreHostKey(), //nolint:gosec // Test only
Timeout: 10 * time.Second,
}
addr := fmt.Sprintf("%s:%d", s.Host, s.Port)
return ssh.Dial("tcp", addr, config)
}
// Stop stops the SSH test server container
func (s *SSHTestServer) Stop() {
// Container is managed by docker-compose, so we don't stop it here
// This allows multiple tests to reuse the same container
}
// Cleanup stops and removes the SSH test container
func (s *SSHTestServer) Cleanup() {
cmd := exec.Command("docker", "stop", s.Container)
_ = cmd.Run()
cmd = exec.Command("docker", "rm", s.Container)
_ = cmd.Run()
}
// Exec runs a command on the SSH server and returns output
func (s *SSHTestServer) Exec(cmd string) (string, error) {
client, err := s.NewClient()
if err != nil {
return "", fmt.Errorf("failed to connect: %w", err)
}
defer client.Close()
session, err := client.NewSession()
if err != nil {
return "", fmt.Errorf("failed to create session: %w", err)
}
defer session.Close()
output, err := session.CombinedOutput(cmd)
if err != nil {
return string(output), fmt.Errorf("command failed: %w", err)
}
return string(output), nil
}
// ExecWithPTY runs a command with PTY allocation for interactive TUI testing
func (s *SSHTestServer) ExecWithPTY(cmd string, term string, width, height int) (*ssh.Session, error) {
client, err := s.NewClient()
if err != nil {
return nil, fmt.Errorf("failed to connect: %w", err)
}
session, err := client.NewSession()
if err != nil {
client.Close()
return nil, fmt.Errorf("failed to create session: %w", err)
}
// Request PTY
modes := ssh.TerminalModes{
ssh.ECHO: 0,
ssh.TTY_OP_ISPEED: 14400,
ssh.TTY_OP_OSPEED: 14400,
}
if err := session.RequestPty(term, width, height, modes); err != nil {
session.Close()
client.Close()
return nil, fmt.Errorf("failed to request pty: %w", err)
}
if err := session.Start(cmd); err != nil {
session.Close()
client.Close()
return nil, fmt.Errorf("failed to start command: %w", err)
}
return session, nil
}

182
tests/fixtures/tui_driver.go vendored Normal file
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// Package tests provides TUI test driver for SSH testing
package tests
import (
"bytes"
"fmt"
"io"
"time"
"golang.org/x/crypto/ssh"
)
// TUIDriver provides a driver for interacting with the TUI over SSH
type TUIDriver struct {
session *ssh.Session
stdin io.WriteCloser
stdout io.Reader
stderr io.Reader
outputBuf *bytes.Buffer
width int
height int
}
// NewTUIDriver creates a new TUI driver connected via SSH
func NewTUIDriver(session *ssh.Session, width, height int) (*TUIDriver, error) {
stdin, err := session.StdinPipe()
if err != nil {
return nil, fmt.Errorf("failed to get stdin pipe: %w", err)
}
stdout, err := session.StdoutPipe()
if err != nil {
return nil, fmt.Errorf("failed to get stdout pipe: %w", err)
}
stderr, err := session.StderrPipe()
if err != nil {
return nil, fmt.Errorf("failed to get stderr pipe: %w", err)
}
driver := &TUIDriver{
session: session,
stdin: stdin,
stdout: stdout,
stderr: stderr,
outputBuf: &bytes.Buffer{},
width: width,
height: height,
}
return driver, nil
}
// SendKey sends a single key to the TUI
func (d *TUIDriver) SendKey(key byte) error {
_, err := d.stdin.Write([]byte{key})
return err
}
// SendKeys sends multiple keys to the TUI
func (d *TUIDriver) SendKeys(keys string) error {
_, err := d.stdin.Write([]byte(keys))
return err
}
// SendEscape sends the Escape key
func (d *TUIDriver) SendEscape() error {
return d.SendKey(0x1b) // ESC
}
// SendEnter sends the Enter key
func (d *TUIDriver) SendEnter() error {
return d.SendKey('\n')
}
// SendCtrlC sends Ctrl+C (SIGINT)
func (d *TUIDriver) SendCtrlC() error {
return d.SendKey(0x03) // ETX (Ctrl+C)
}
// SendArrowUp sends the up arrow key
func (d *TUIDriver) SendArrowUp() error {
_, err := d.stdin.Write([]byte{0x1b, '[', 'A'})
return err
}
// SendArrowDown sends the down arrow key
func (d *TUIDriver) SendArrowDown() error {
_, err := d.stdin.Write([]byte{0x1b, '[', 'B'})
return err
}
// SendArrowLeft sends the left arrow key
func (d *TUIDriver) SendArrowLeft() error {
_, err := d.stdin.Write([]byte{0x1b, '[', 'D'})
return err
}
// SendArrowRight sends the right arrow key
func (d *TUIDriver) SendArrowRight() error {
_, err := d.stdin.Write([]byte{0x1b, '[', 'C'})
return err
}
// SendTab sends the Tab key
func (d *TUIDriver) SendTab() error {
return d.SendKey('\t')
}
// CaptureScreen reads the current screen output
func (d *TUIDriver) CaptureScreen(timeout time.Duration) (string, error) {
// Clear previous buffer
d.outputBuf.Reset()
// Read with timeout
done := make(chan error, 1)
go func() {
buf := make([]byte, 4096)
for {
n, err := d.stdout.Read(buf)
if n > 0 {
d.outputBuf.Write(buf[:n])
}
if err != nil {
done <- err
return
}
}
}()
select {
case <-time.After(timeout):
return d.outputBuf.String(), nil
case err := <-done:
if err == io.EOF {
return d.outputBuf.String(), nil
}
return d.outputBuf.String(), err
}
}
// WaitForOutput waits for specific output to appear
func (d *TUIDriver) WaitForOutput(expected string, timeout time.Duration) error {
deadline := time.Now().Add(timeout)
d.outputBuf.Reset()
buf := make([]byte, 1024)
for time.Now().Before(deadline) {
n, err := d.stdout.Read(buf)
if n > 0 {
d.outputBuf.Write(buf[:n])
if bytes.Contains(d.outputBuf.Bytes(), []byte(expected)) {
return nil
}
}
if err != nil && err != io.EOF {
// Continue on timeout
time.Sleep(50 * time.Millisecond)
continue
}
// Short sleep to prevent tight loop
time.Sleep(50 * time.Millisecond)
}
return fmt.Errorf("timeout waiting for output containing %q. Got: %s", expected, d.outputBuf.String())
}
// Close closes the TUI driver and session
func (d *TUIDriver) Close() error {
d.stdin.Close()
return d.session.Close()
}
// Wait waits for the session to complete
func (d *TUIDriver) Wait() error {
return d.session.Wait()
}
// Signal sends a signal to the session
func (d *TUIDriver) Signal(sig ssh.Signal) error {
return d.session.Signal(sig)
}