SSH MCP Server

/** * Villenele Double Echo Detection Test * * Uses Terminal History Testing Framework to detect double echo problems * in the browser terminal implementation. This test captures real WebSocket * messages from browser perspective to verify clean terminal display. */ import { JestTestUtilities } from './integration/terminal-history-framework/jest-test-utilities'; describe('Villenele: Double Echo Detection', () => { const testUtils = JestTestUtilities.setupJestEnvironment('double-echo-detection'); /** * TEST GOAL: Detect double echo in character-by-character typing * * EXPECTED BEHAVIOR: * - User types 'w', 'h', 'o', 'a', 'm', 'i', ENTER * - SSH echoes back each character once * - WebSocket should show single 'whoami' and result * * DOUBLE ECHO PROBLEM: * - Browser shows local 'whoami' * - SSH also echoes 'whoami' * - WebSocket captures 'wwhhooaammii' or duplicate display */ test('✅ Character-by-character typing should not cause double echo', async () => { const config = { preWebSocketCommands: [ 'ssh_connect {"name": "final-validation", "host": "localhost", "username": "jsbattig", "keyFilePath": "~/.ssh/id_ed25519"}' ], postWebSocketCommands: [ // This will be sent character by character to simulate typing {initiator: 'mcp-client', command: 'ssh_exec {"sessionName": "final-validation", "command": "whoami"}'} ], workflowTimeout: 20000, sessionName: 'final-validation' }; const result = await testUtils.runTerminalHistoryTest(config); // ASSERTION: WebSocket messages should NOT contain double characters // This test will FAIL until we fix the terminal-input-handler.js state issues expect(result.concatenatedResponses) .not.toContain('wwhhooaammii'); // Double character echo expect(result.concatenatedResponses) .not.toContain('whooami'); // Partial double echo // Should contain clean single 'whoami' command expect(result.concatenatedResponses) .toMatch(/\[.*\]\$.*whoami.*\r?\n/); // Clean command with result // Validate proper CRLF line endings are preserved testUtils.expectWebSocketMessages(result.concatenatedResponses) .toContainCRLF() .toHavePrompts() .validate(); }); /** * TEST GOAL: Validate clean terminal experience * * EXPECTED BEHAVIOR: * - Commands appear inline with prompts * - No local browser state pollution * - SSH handles ALL terminal display logic */ test('✅ Terminal display should be clean like standard SSH client', async () => { const config = { preWebSocketCommands: [ 'ssh_connect {"name": "final-validation", "host": "localhost", "username": "jsbattig", "keyFilePath": "~/.ssh/id_ed25519"}' ], postWebSocketCommands: [ {initiator: 'mcp-client', command: 'ssh_exec {"sessionName": "final-validation", "command": "pwd"}'}, {initiator: 'mcp-client', command: 'ssh_exec {"sessionName": "final-validation", "command": "ls -la"}'} ], workflowTimeout: 30000, sessionName: 'final-validation' }; const result = await testUtils.runTerminalHistoryTest(config); // ASSERTION: Each command should appear exactly once const pwdMatches = (result.concatenatedResponses.match(/pwd/g) || []).length; const lsMatches = (result.concatenatedResponses.match(/ls -la/g) || []).length; // Should see each command exactly once (not doubled) expect(pwdMatches).toBeLessThanOrEqual(2); // Once in prompt, once in history expect(lsMatches).toBeLessThanOrEqual(2); // Once in prompt, once in history // Should NOT have character duplication patterns expect(result.concatenatedResponses).not.toMatch(/([a-z])\1{2,}/); // No triple+ chars // Should have proper command/result separation testUtils.expectWebSocketMessages(result.concatenatedResponses) .toMatchCommandSequence(['pwd', 'ls -la']) .toHaveMinimumLength(10) .validate(); }); /** * TEST GOAL: Validate browser is pure passthrough * * EXPECTED BEHAVIOR: * - Browser sends raw input to SSH * - SSH handles ALL echoing, editing, cursor movement * - WebSocket captures only SSH output (no browser pollution) */ test('✅ Browser should be pure input passthrough', async () => { const config = { preWebSocketCommands: [ 'ssh_connect {"name": "final-validation", "host": "localhost", "username": "jsbattig", "keyFilePath": "~/.ssh/id_ed25519"}' ], postWebSocketCommands: [ // Test backspace behavior {initiator: 'mcp-client', command: 'ssh_exec {"sessionName": "final-validation", "command": "echo test"}'} ], workflowTimeout: 15000, sessionName: 'final-validation' }; const result = await testUtils.runTerminalHistoryTest(config); // ASSERTION: Should see clean command execution // Real WebSocket captures show: "[jsbattig@localhost ~]$ echo test" followed by "test" output expect(result.concatenatedResponses) .toContain('echo test'); // Command present expect(result.concatenatedResponses) .toMatch(/echo test[\s\S]*test/); // Command followed by output (flexible whitespace) // Should NOT have browser state artifacts expect(result.concatenatedResponses) .not.toContain('currentLine'); // No state leakage expect(result.concatenatedResponses) .not.toContain('cursorPosition'); // No state leakage // Should maintain proper terminal flow testUtils.expectWebSocketMessages(result.concatenatedResponses) .toContainCRLF() .toHavePrompts() .validate(); }); });