run_project_tests: support checking for symlinks

data/test.schema.json

@@ -33,7 +33,8 @@
               "py_implib",
               "py_limited_implib",
               "implibempty",
-              "expr"
+              "expr",
+              "link"
             ]
           },
           "platform": {

run_project_tests.py

@@ -199,7 +199,7 @@ class InstalledFile:
                     return None
             if self.typ == 'python_bytecode':
                 return p.parent / importlib.util.cache_from_source(p.name)
-        elif self.typ in {'file', 'dir'}:
+        elif self.typ in {'file', 'dir', 'link'}:
             return p
         elif self.typ == 'shared_lib':
             if env.machines.host.is_windows() or env.machines.host.is_cygwin():
@@ -263,6 +263,11 @@ class InstalledFile:
             if not abs_p.is_dir():
                 raise RuntimeError(f'{p} is not a directory')
             return [x.relative_to(installdir) for x in abs_p.rglob('*') if x.is_file() or x.is_symlink()]
+        elif self.typ == 'link':
+            abs_p = installdir / p
+            if not abs_p.is_symlink():
+                raise RuntimeError(f'{p} is not a symlink')
+            return [p]
         else:
             return [p]