SSH MCP Server

/** * CRITICAL BUG REPRODUCTION TEST: Command Echo Filtering Failure * * This test reproduces the triple output disaster where: * 1. Frontend shows typing echo (expected) * 2. Server sends command echo (BUG - should be filtered) * 3. Server sends result (expected) * 4. Server sends full replay (creates triple output) * * Expected behavior: WebSocket should contain ONLY the command result, * NOT the duplicate command echo. * * Uses Villenele framework for real MCP server, SSH, and WebSocket testing. */ import { JestTestUtilities } from './integration/terminal-history-framework/jest-test-utilities'; describe('Command Echo Filtering Bug Reproduction', () => { const testUtils = JestTestUtilities.setupJestEnvironment('command-echo-filtering-bug'); beforeAll(async () => { // Increase timeout for real MCP/SSH operations jest.setTimeout(60000); }); test('should filter out command echo from WebSocket messages - pwd command', async () => { // Configuration for testing command echo filtering const config = { preWebSocketCommands: [ // Establish SSH connection 'ssh_connect {"name": "echo-filter-test", "host": "localhost", "username": "jsbattig", "keyFilePath": "/home/jsbattig/.ssh/id_ed25519"}' ], postWebSocketCommands: [ // Execute pwd command after WebSocket connection established 'ssh_exec {"sessionName": "echo-filter-test", "command": "pwd"}' ], workflowTimeout: 30000, sessionName: 'echo-filter-test' }; // Execute test using Villenele framework const result = await testUtils.runTerminalHistoryTest(config); // Extract the WebSocket response content const webSocketMessages = result.concatenatedResponses; console.log('=== WEBSOCKET MESSAGES DEBUG ==='); console.log('Full WebSocket content:'); console.log(JSON.stringify(webSocketMessages, null, 2)); console.log('Raw WebSocket content:'); console.log(webSocketMessages); console.log('================================'); // EXACT ASSERTION REQUIREMENTS: // 1. WebSocket message should contain the pwd result (e.g., '/home/jsbattig' or similar) // 2. WebSocket message should NOT contain duplicate 'pwd' command echo // 3. Should not have triple output where command appears multiple times // These tests will FAIL initially, proving the bug exists // Positive assertion: Should contain the command result expect(webSocketMessages).toContain('/home/jsbattig'); // Critical negative assertions: Should NOT contain duplicate command echo // Count occurrences of 'pwd' - should appear maximum once in prompt context, not as standalone command echo const pwdOccurrences = (webSocketMessages.match(/pwd/g) || []).length; console.log(`PWD occurrences found: ${pwdOccurrences}`); // BUG REPRODUCTION: This will FAIL because command echo is not filtered // We should see only 1 occurrence (in prompt), but bug causes multiple occurrences expect(pwdOccurrences).toBeLessThanOrEqual(1); // Additional exact string assertions to verify no triple output // Should not see standalone 'pwd' command echo separate from result expect(webSocketMessages).not.toMatch(/^pwd$/m); // No standalone pwd on its own line expect(webSocketMessages).not.toMatch(/pwd\r?\n\/home/); // No pwd followed immediately by result // Should have clean command result output expect(webSocketMessages).toMatch(/\/home\/jsbattig/); }); test('should filter out command echo from WebSocket messages - whoami command', async () => { // Test with different command to verify filtering works across commands const config = { preWebSocketCommands: [ 'ssh_connect {"name": "echo-filter-whoami", "host": "localhost", "username": "jsbattig", "keyFilePath": "/home/jsbattig/.ssh/id_ed25519"}' ], postWebSocketCommands: [ 'ssh_exec {"sessionName": "echo-filter-whoami", "command": "whoami"}' ], workflowTimeout: 30000, sessionName: 'echo-filter-whoami' }; const result = await testUtils.runTerminalHistoryTest(config); const webSocketMessages = result.concatenatedResponses; console.log('=== WHOAMI WEBSOCKET DEBUG ==='); console.log('WebSocket content:'); console.log(webSocketMessages); console.log('=============================='); // Should contain the whoami result expect(webSocketMessages).toContain('jsbattig'); // Should not contain duplicate whoami command echo const whoamiOccurrences = (webSocketMessages.match(/whoami/g) || []).length; console.log(`WHOAMI occurrences found: ${whoamiOccurrences}`); // BUG REPRODUCTION: This will FAIL due to command echo not being filtered expect(whoamiOccurrences).toBeLessThanOrEqual(1); // No standalone whoami command echo expect(webSocketMessages).not.toMatch(/^whoami$/m); expect(webSocketMessages).not.toMatch(/whoami\r?\njsbattig/); }); test('should handle multiple commands without echo duplication', async () => { // Test sequence of commands to verify consistent filtering const config = { preWebSocketCommands: [ 'ssh_connect {"name": "echo-filter-multi", "host": "localhost", "username": "jsbattig", "keyFilePath": "/home/jsbattig/.ssh/id_ed25519"}' ], postWebSocketCommands: [ 'ssh_exec {"sessionName": "echo-filter-multi", "command": "pwd"}', 'ssh_exec {"sessionName": "echo-filter-multi", "command": "whoami"}' ], workflowTimeout: 45000, sessionName: 'echo-filter-multi' }; const result = await testUtils.runTerminalHistoryTest(config); const webSocketMessages = result.concatenatedResponses; console.log('=== MULTI-COMMAND WEBSOCKET DEBUG ==='); console.log('WebSocket content:'); console.log(webSocketMessages); console.log('====================================='); // Should contain both command results expect(webSocketMessages).toContain('/home/jsbattig'); expect(webSocketMessages).toContain('jsbattig'); // Critical: Should not have excessive command echoes const pwdOccurrences = (webSocketMessages.match(/pwd/g) || []).length; const whoamiOccurrences = (webSocketMessages.match(/whoami/g) || []).length; console.log(`Multi-command PWD occurrences: ${pwdOccurrences}`); console.log(`Multi-command WHOAMI occurrences: ${whoamiOccurrences}`); // BUG REPRODUCTION: These will FAIL due to unfiltered command echoes expect(pwdOccurrences).toBeLessThanOrEqual(2); // At most in prompts expect(whoamiOccurrences).toBeLessThanOrEqual(2); // At most in prompts }); });