Add server ping scenario (#75)

src/scenarios/index.ts

@@ -8,6 +8,7 @@ import { SSERetryScenario } from './client/sse-retry';
 import { ServerInitializeScenario } from './server/lifecycle';
 
 import {
+  PingScenario,
   LoggingSetLevelScenario,
   CompletionCompleteScenario
 } from './server/utils';
@@ -80,6 +81,7 @@ const allClientScenariosList: ClientScenario[] = [
 
   // Utilities scenarios
   new LoggingSetLevelScenario(),
+  new PingScenario(),
   new CompletionCompleteScenario(),
 
   // Tools scenarios

src/scenarios/server/utils.ts

@@ -83,6 +83,95 @@ export class LoggingSetLevelScenario implements ClientScenario {
   }
 }
 
+export class PingScenario implements ClientScenario {
+  name = 'ping';
+  description = `Test ping utility for connection health check.
+
+**Server Implementation Requirements:**
+
+**Endpoint**: \`ping\`
+
+**Requirements**:
+- Accept ping request with no parameters
+- Respond promptly with empty object \`{}\`
+
+**Request Format**:
+
+\`\`\`json
+{
+  "jsonrpc": "2.0",
+  "id": "123",
+  "method": "ping"
+}
+\`\`\`
+
+**Response Format**:
+
+\`\`\`json
+{
+  "jsonrpc": "2.0",
+  "id": "123",
+  "result": {}
+}
+\`\`\`
+
+**Implementation Note**: The ping utility allows either party to verify that their counterpart is still responsive and the connection is alive.`;
+
+  async run(serverUrl: string): Promise<ConformanceCheck[]> {
+    const checks: ConformanceCheck[] = [];
+
+    try {
+      const connection = await connectToServer(serverUrl);
+
+      // Send ping request
+      const result = await connection.client.ping();
+
+      // Validate response (should return empty object {})
+      const errors: string[] = [];
+      if (result && Object.keys(result).length > 0) {
+        errors.push('Expected empty object {} response');
+      }
+
+      checks.push({
+        id: 'ping',
+        name: 'Ping',
+        description: 'Server responds to ping requests',
+        status: errors.length === 0 ? 'SUCCESS' : 'FAILURE',
+        timestamp: new Date().toISOString(),
+        errorMessage: errors.length > 0 ? errors.join('; ') : undefined,
+        specReferences: [
+          {
+            id: 'MCP-Ping',
+            url: 'https://modelcontextprotocol.io/specification/2025-06-18/basic/utilities/ping'
+          }
+        ],
+        details: {
+          result
+        }
+      });
+
+      await connection.close();
+    } catch (error) {
+      checks.push({
+        id: 'ping',
+        name: 'Ping',
+        description: 'Server responds to ping requests',
+        status: 'FAILURE',
+        timestamp: new Date().toISOString(),
+        errorMessage: `Failed: ${error instanceof Error ? error.message : String(error)}`,
+        specReferences: [
+          {
+            id: 'MCP-Ping',
+            url: 'https://modelcontextprotocol.io/specification/2025-06-18/basic/utilities/ping'
+          }
+        ]
+      });
+    }
+
+    return checks;
+  }
+}
+
 export class CompletionCompleteScenario implements ClientScenario {
   name = 'completion-complete';
   description = `Test completion endpoint.