add test route

x-pack/plugins/integration_assistant/server/routes/register_routes.ts

@@ -5,7 +5,11 @@
  * 2.0.
  */
 
+import { schema } from '@kbn/config-schema';
 import type { IRouter } from '@kbn/core/server';
+import fs from 'fs';
+import nunjucks from 'nunjucks';
+import { resolve as resolvePath } from 'path';
 import { registerEcsRoutes } from './ecs_routes';
 import { registerIntegrationBuilderRoutes } from './build_integration_routes';
 import { registerCategorizationRoutes } from './categorization_routes';
@@ -19,4 +23,46 @@ export function registerRoutes(router: IRouter<IntegrationAssistantRouteHandlerC
   registerCategorizationRoutes(router);
   registerRelatedRoutes(router);
   registerPipelineRoutes(router);
+
+  router.versioned
+    .get({
+      path: '/api/integration_assistant/test',
+      access: 'internal',
+    })
+    .addVersion(
+      {
+        version: '1',
+        validate: {
+          request: {
+            query: schema.any(),
+          },
+        },
+      },
+      async (context, req, res) => {
+        let body: Record<string, unknown> = {};
+        try {
+          const templateDir = resolvePath(__dirname, '../templates');
+          const templateFile = resolvePath(templateDir, 'readme.md.njk');
+          body = {
+            templateDir: { path: templateFile, content: fs.readFileSync(templateFile).toString() },
+          };
+
+          nunjucks.configure([templateDir], {
+            autoescape: false,
+          });
+
+          const readmeTemplate = nunjucks.render('readme.md.njk', {
+            package_name: 'testPackageName',
+            data_streams: ['testDataStreamName'],
+          });
+
+          body.readme = readmeTemplate;
+
+          return res.ok({ body });
+        } catch (error) {
+          body.error = error.toString();
+          return res.customError({ statusCode: 400, body: JSON.stringify(body) });
+        }
+      }
+    );
 }