added test for tapEscape function

Author: pulkit-30

lib/internal/test_runner/tap_stream.js

@@ -270,4 +270,4 @@ function isAssertionLike(value) {
   return value && typeof value === 'object' && 'expected' in value && 'actual' in value;
 }
 
-module.exports = { TapStream };
+module.exports = { TapStream, tapEscape };

test/parallel/test-runner-tap-parser-stream.js

@@ -4,6 +4,7 @@ const common = require('../common');
 const assert = require('node:assert');
 const { TapParser } = require('internal/test_runner/tap_parser');
 const { TapChecker } = require('internal/test_runner/tap_checker');
+const { tapEscape } = require('internal/test_runner/tap_stream');
 
 const cases = [
   {
@@ -627,3 +628,17 @@ ok 1 - test 1
     expected.map((item) => ({ __proto__: null, ...item }))
   );
 })().then(common.mustCall());
+
+(async () => {
+  [{ escapeChar: '\\', tappedEscape: '\\\\' },
+   { escapeChar: '#', tappedEscape: '\\#' },
+   { escapeChar: '\n', tappedEscape: '\\n' },
+   { escapeChar: '\t', tappedEscape: '\\t' },
+   { escapeChar: '\r', tappedEscape: '\\r' },
+   { escapeChar: '\f', tappedEscape: '\\f' },
+   { escapeChar: '\b', tappedEscape: '\\b' },
+   { escapeChar: '\v', tappedEscape: '\\v' },
+  ].forEach(({ escapeChar, tappedEscape }) => {
+    assert.strictEqual(tapEscape(escapeChar), tappedEscape);
+  });
+})().then(common.mustCall());