adding api test

x-pack/test/api_integration/apis/file_upload/index.ts

@@ -12,5 +12,6 @@ export default function ({ loadTestFile }: FtrProviderContext) {
     loadTestFile(require.resolve('./has_import_permission'));
     loadTestFile(require.resolve('./index_exists'));
     loadTestFile(require.resolve('./preview_index_time_range'));
+    loadTestFile(require.resolve('./preview_tika_contents'));
   });
 }

x-pack/test/api_integration/apis/file_upload/preview_tika_contents.ts

@@ -0,0 +1,49 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { ELASTIC_HTTP_VERSION_HEADER } from '@kbn/core-http-common';
+import expect from '@kbn/expect';
+import { FtrProviderContext } from '../../ftr_provider_context';
+import { pdfBase64 } from './pdf_base64';
+
+export default ({ getService }: FtrProviderContext) => {
+  const supertest = getService('supertest');
+
+  async function runRequest(base64File: string, expectedResponseCode: number = 200) {
+    const { body } = await supertest
+      .post(`/internal/file_upload/preview_tika_contents`)
+      .set('kbn-xsrf', 'kibana')
+      .set(ELASTIC_HTTP_VERSION_HEADER, '1')
+      .send({ base64File })
+      .expect(expectedResponseCode);
+
+    return body;
+  }
+  const expectedResponse = {
+    date: '2010-12-01T13:33:24Z',
+    content_type: 'application/pdf',
+    author: 'John',
+    format: 'application/pdf; version=1.5',
+    modified: '2010-12-01T13:33:24Z',
+    language: 'en',
+    creator_tool: 'Microsoft® Word 2010',
+    content: 'This is a test PDF file',
+    content_length: 28,
+  };
+
+  describe('POST /internal/file_upload/preview_tika_content', () => {
+    it('should return the text content from the file', async () => {
+      const resp = await runRequest(pdfBase64);
+
+      expect(resp).to.eql(expectedResponse);
+    });
+
+    it('should fail to return text when bad data is sent', async () => {
+      await runRequest('bad data', 500);
+    });
+  });
+};