section could not be matched when sectionFileName="/xxx/../xx"

[agfn]

Describe the bug

When sectionFileName inlcov.info file contains .., function checkSectionAbsolute (used to match coverage section and source file) does not work correctly.

To Reproduce
Steps to reproduce the behaviour:

1. lcov.info contains the follow content:

SF:/home/lt/projects/libfuzz/json-c/build/../arraylist.c
FN:40,array_list_new
FN:45,array_list_new2
FN:65,array_list_free
FN:75,array_list_get_idx
FN:107,array_list_shrink
FN:130,array_list_put_idx
...
end_of_record

2. Then, you will found json-c/arraylist.c file will be marked as "No Coverage". Because checkSectionAbsolute only check suffix, and
   sectionFileName is not simplified absolute path.

Expected behaviour

Screenshots

Desktop (please complete the following information):

• OS: Ubuntu 20.04
• Extension Version: github master brach
• VSCode Version 1.62.0

Additional context
Add any other context about the problem here.

[agfn]

can be fixed by the following patch:

--- a/src/helpers.ts
+++ b/src/helpers.ts
@@ -1,3 +1,4 @@
+import {normalize} from "path";
 
 /**
  * Finds the matching suffixes of the string, stripping off the non-matching starting characters.
@@ -28,7 +29,7 @@ export function findIntersect(base: string, comparee: string): string {
  * @param fileName File name to remove OS specific features
  */
 export function normalizeFileName(fileName: string): string {
-    let name = fileName;
+    let name = normalize(fileName);
     // make file path relative and OS independent
     name = name.toLocaleLowerCase();
     // remove all file slashes

[ryanluker]

@agfn Thanks for the ticket and the fix! This will go out in 2.9.0 and I will try to get a PR up today for you to review (the fix is pretty much what you added above but I am trying to add some test coverage to prevent regressions in the future).

[ryanluker]

@agfn I have a first try here at the fix you mentioned #352 there might be a bit of cleanup left over as normalizing the file name causes some other tests to fail 🤔.

The failing tests are just unit level ones though, so most likely just a simple cleanup 😁.