Add preserve interword spaces test case

examples/node/preserve-interword-spaces.js

@@ -0,0 +1,22 @@
+#!/usr/bin/env node
+const path = require('path');
+const fs = require('fs');
+const { createWorker } = require('../../');
+
+const [,, imagePath] = process.argv;
+const image = path.resolve(__dirname, (imagePath || '../../tests/assets/images/bill.png'));
+
+console.log(`Recognizing ${image}`);
+
+(async () => {
+  const worker = createWorker();
+  await worker.load();
+  await worker.loadLanguage('eng');
+  await worker.initialize('eng');
+  await worker.setParameters({
+    preserve_interword_spaces: '1',
+  });
+  const { data: { text } } = await worker.recognize(image);
+  console.log(JSON.stringify({ text }));
+  await worker.terminate();
+})();

package.json

@@ -12,8 +12,9 @@
     "prepublishOnly": "npm run build",
     "wait": "rimraf dist && wait-on http://localhost:3000/dist/tesseract.dev.js",
     "test": "npm-run-all -p -r start test:all",
-    "test:all": "npm-run-all wait test:browser:* test:node",
-    "test:node": "nyc mocha --exit --bail --require ./scripts/test-helper.js ./tests/*.test.js",
+    "test:all": "npm-run-all wait test:browser:* test:node:all",
+    "test:node": "nyc mocha --exit --bail --require ./scripts/test-helper.js",
+    "test:node:all": "npm run test:node:one -- ./tests/*.test.js",
     "test:browser-tpl": "mocha-headless-chrome -a incognito -a no-sandbox -a disable-setuid-sandbox -a disable-logging -t 300000",
     "test:browser:detect": "npm run test:browser-tpl -- -f ./tests/detect.test.html",
     "test:browser:recognize": "npm run test:browser-tpl -- -f ./tests/recognize.test.html",

tests/recognize.test.js

@@ -81,6 +81,17 @@ describe('recognize()', () => {
     ));
   });
 
+  describe('should work with selected parameters', () => {
+    it('support preserve_interword_spaces', async () => {
+      await worker.initialize('eng');
+      await worker.setParameters({
+        preserve_interword_spaces: '1',
+      });
+      const { data: { text } } = await worker.recognize(`${IMAGE_PATH}/bill.png`);
+      expect(text).to.be(BILL_SPACED_TEXT);
+    }).timeout(TIMEOUT);
+  });
+
   describe('should support all page seg modes', () => {
     Object
       .keys(PSM)