Custom Extractor for clinicaltrials.gov (#305)

* Add prototype of custom extractor for clinicaltrials.gov

* Add .DS_Store to gitignore

* Make tests for title, author and date_published selectors pass

* Make content selector test pass

* Fix date_published test

* Rebuild

* Remove .DS-Store from gitignore

* Improve extractor and text/fixture of clinicaltrials.gov

src/extractors/custom/clinicaltrials.gov/index.js

@@ -0,0 +1,29 @@
+export const ClinicaltrialsGovExtractor = {
+  domain: 'clinicaltrials.gov',
+
+  title: {
+    selectors: ['h1.tr-solo_record'],
+  },
+
+  author: {
+    selectors: ['div#sponsor.tr-info-text'],
+  },
+
+  date_published: {
+    // selectors: ['span.term[data-term="Last Update Posted"]'],
+    selectors: ['div:has(> span.term[data-term="Last Update Posted"])'],
+  },
+
+  content: {
+    selectors: ['div#tab-body'],
+
+    // Is there anything in the content you selected that needs transformed
+    // before it's consumable content? E.g., unusual lazy loaded images
+    transforms: {},
+
+    // Is there anything that is in the result that shouldn't be?
+    // The clean selectors will remove anything that matches from
+    // the result
+    clean: ['.usa-alert> img'],
+  },
+};

src/extractors/custom/clinicaltrials.gov/index.test.js

@@ -0,0 +1,91 @@
+import assert from 'assert';
+import URL from 'url';
+import cheerio from 'cheerio';
+import moment from 'moment-timezone';
+
+import Mercury from 'mercury';
+import getExtractor from 'extractors/get-extractor';
+import { excerptContent } from 'utils/text';
+
+const fs = require('fs');
+
+describe('ClinicaltrialsGovExtractor', () => {
+  describe('initial test case', () => {
+    let result;
+    let url;
+
+    beforeAll(() => {
+      url =
+        'https://clinicaltrials.gov/ct2/show/NCT03746262?term=Guardant+Health';
+      const html = fs.readFileSync(
+        './fixtures/clinicaltrials.gov/1551708504719.html'
+      );
+      result = Mercury.parse(url, { html, fallback: false });
+    });
+
+    it('is selected properly', () => {
+      // This test should be passing by default.
+      // It sanity checks that the correct parser
+      // is being selected for URLs from this domain
+      const extractor = getExtractor(url);
+      assert.equal(extractor.domain, URL.parse(url).hostname);
+    });
+
+    it('returns the title', async () => {
+      // To pass this test, fill out the title selector
+      // in ./src/extractors/custom/clinicaltrials.gov/index.js.
+      const { title } = await result;
+
+      // Update these values with the expected values from
+      // the article.
+      assert.equal(
+        title,
+        `Changes in Circulating Tumor-Specific DNA in Patients With Non-Metastatic Non-Small Cell Lung Cancer`
+      );
+    });
+
+    it('returns the author', async () => {
+      // To pass this test, fill out the author selector
+      // in ./src/extractors/custom/clinicaltrials.gov/index.js.
+      const { author } = await result;
+
+      // Update these values with the expected values from
+      // the article.
+      assert.equal(author, 'Wake Forest University Health Sciences');
+    });
+
+    it('returns the date_published', async () => {
+      // To pass this test, fill out the date_published selector
+      // in ./src/extractors/custom/clinicaltrials.gov/index.js.
+      const { date_published } = await result;
+
+      // Update these values with the expected values from
+      // the article.
+      assert.equal(moment(date_published).format('YYYY-MM-DD'), '2018-11-21');
+    });
+
+    it('returns the content', async () => {
+      // To pass this test, fill out the content selector
+      // in ./src/extractors/custom/clinicaltrials.gov/index.js.
+      // You may also want to make use of the clean and transform
+      // options.
+      const { content } = await result;
+
+      const $ = cheerio.load(content || '');
+
+      const first13 = excerptContent(
+        $('*')
+          .first()
+          .text(),
+        13
+      );
+
+      // Update these values with the expected values from
+      // the article.
+      assert.equal(
+        first13,
+        'The purpose of this research study is to evaluate a blood test to'
+      );
+    });
+  });
+});

src/extractors/custom/index.js

@@ -93,6 +93,7 @@ export * from './www.fortinet.com';
 export * from './www.fastcompany.com';
 export * from './blisterreview.com';
 export * from './news.mynavi.jp';
+export * from './clinicaltrials.gov';
 export * from './github.com';
 export * from './www.reddit.com';
 export * from './otrs.com';

src/resource/index.test.js

@@ -109,10 +109,9 @@ describe('Resource', () => {
         () => {
           Resource.generateDoc({ body, response });
         },
-        err => (
-          (err instanceof Error) &&
+        err =>
+          err instanceof Error &&
           /content does not appear to be text/i.test(err)
-        )
       );
     });