script for update file LineBreakTest.txt

Author: liborm85

readme.md

@@ -9,7 +9,7 @@ An implementation of the Unicode Line Breaking Algorithm (UAX #14)
 
 This is a JavaScript implementation of the [Unicode Line Breaking Algorithm](http://www.unicode.org/reports/tr14/#SampleCode) for Node.js
 (and browsers I guess). Currently supports Unicode version 13. It is used by [PDFKit](http://github.com/devongovett/pdfkit/) for
-line wrapping text in PDF documents, but since the algorithm knows nothing about the actual visual appearance or layout of text, 
+line wrapping text in PDF documents, but since the algorithm knows nothing about the actual visual appearance or layout of text,
 it could be used for other things as well.
 
 ## Installation
@@ -55,7 +55,8 @@ contributing or fixing bugs, these things might be of interest.
   `LineBreakTest.txt` from the Unicode database, which is included in the repository for performance
   reasons while running them. About 50 of the over 7600 tests are currently skipped due to
   implementation differences. It appears that some of the tests may be wrong or use different
-  tailoring from the spec.
+  tailoring from the spec. To update the `LineBreakTest.txt` file, use the script
+  `test/update_test_file.js`, which downloads and updates the tests for the new Unicode version.
 
 ## License
 

test/update_test_file.js

@@ -0,0 +1,11 @@
+import fs from 'fs';
+import https from'https';
+
+const file = fs.createWriteStream('LineBreakTest.txt');
+https.get("https://www.unicode.org/Public/15.0.0/ucd/auxiliary/LineBreakTest.txt", function(response) {
+   response.pipe(file);
+   file.on("finish", () => {
+       file.close();
+       console.log("Test file updated.");
+   });
+});