tests: handle paths on Windows

Author: stefanv

spin/tests/test_build_cmds.py

@@ -2,7 +2,7 @@
 import subprocess
 import sys
 import tempfile
-from pathlib import Path
+from pathlib import Path, PureWindowsPath
 
 import pytest
 
@@ -19,6 +19,10 @@
 )
 
 
+def unix_path(p: str) -> str:
+    return PureWindowsPath(p).as_posix()
+
+
 def test_basic_build(example_pkg):
     """Does the package build?"""
     spin("build")
@@ -178,7 +182,7 @@ def test_parallel_builds(example_pkg):
     spin("build")
     spin("build", "-C", "parallel/build")
     p = spin("python", "--", "-c", "import example_pkg; print(example_pkg.__file__)")
-    example_pkg_path = stdout(p).split("\n")[-1]
+    example_pkg_path = unix_path(stdout(p).split("\n")[-1])
     p = spin(
         "python",
         "-C",
@@ -187,7 +191,7 @@ def test_parallel_builds(example_pkg):
         "-c",
         "import example_pkg; print(example_pkg.__file__)",
     )
-    example_pkg_parallel_path = stdout(p).split("\n")[-1]
+    example_pkg_parallel_path = unix_path(stdout(p).split("\n")[-1])
     assert "build-install" in example_pkg_path
     assert "parallel/build-install" in example_pkg_parallel_path
     assert "parallel/build-install" not in example_pkg_path