[regression test] Add functional test for symlinked modules

This is a regression test for pylint-dev/astroid#1253

Closes #1470

ChangeLog

@@ -6,11 +6,20 @@ What's New in Pylint 2.13.0?
 ============================
 Release date: TBA
 
-* Pyreverse - add output in mermaidjs format
-
 ..
   Put new features here and also in 'doc/whatsnew/2.13.rst'
 
+* An astroid issue where symlinks were not being taken into account
+  was fixed
+
+  Closes #1470
+  Closes #3499
+  Closes #4302
+  Closes #4798
+  Closes #5081
+
+* Pyreverse - add output in mermaidjs format
+
 * ``used-before-assignment`` now considers that assignments in a try block
   may not have occurred when the except or finally blocks are executed.
 

doc/whatsnew/2.13.rst

@@ -32,6 +32,15 @@ Extensions
 Other Changes
 =============
 
+* An astroid issue where symlinks were not being taken into account
+  was fixed
+
+  Closes #1470
+  Closes #3499
+  Closes #4302
+  Closes #4798
+  Closes #5081
+
 * Fixed extremely long processing of long lines with comma's.
 
   Closes #5483

tests/functional/s/symlink/binding/__init__.py

@@ -0,0 +1 @@
+../module/__init__.py

tests/functional/s/symlink/binding/symlinked_module.py

@@ -0,0 +1 @@
+../module/symlinked_module.py

tests/functional/s/symlink/module/__init__.py

@@ -0,0 +1,3 @@
+"""Example taken from issue #1470"""
+
+from symlinked_module import func

tests/functional/s/symlink/module/symlinked_module.py

@@ -0,0 +1,6 @@
+"""Example taken from issue #1470"""
+
+
+def func():
+    """Both module should be parsed without problem"""
+    return 1