The directory third_party/node-re2/ is a copy of node-re2, keeping only the tests folder. Those tests were modified to test this library as follows:

• Imports were changed to match this library.
• RE2(arg) was replaced with new RE2(arg) because it is only callable as a constructor in this library.
• The u flag was added to all RE2 constructor calls because it is required in this library.
• Tests for Buffer handling were removed because this library does not handle Buffers.