Normalize Windows process PATH checks

tests/release_scripts.rs

@@ -276,14 +276,16 @@ fn windows_prebuilt_install_requires_client_but_not_bench() {
 fn windows_installer_adds_user_path_idempotently() {
     let ps1 = include_str!("../install.ps1");
     assert!(ps1.contains("function Add-UserPath($PathToAdd)"));
+    assert!(ps1.contains("function PathList-Contains($PathValue, $PathToFind)"));
+    assert!(ps1.contains("$wanted = Normalize-PathForCompare $PathToFind"));
+    assert!(ps1.contains("foreach ($entry in ($PathValue -split ';' | Where-Object { $_ }))"));
     assert!(ps1.contains("$wanted = Normalize-PathForCompare $PathToAdd"));
     assert!(ps1.contains("-ieq $wanted"));
     assert!(ps1.contains("(@($entries) + $PathToAdd) -join ';'"));
-    assert!(ps1.contains("(\";$env:Path;\").Contains(\";$PathToAdd;\")"));
+    assert!(ps1.contains("PathList-Contains $env:Path $PathToAdd"));
     assert!(ps1.contains("$env:Path = \"$PathToAdd;$env:Path\""));
     assert!(
-        ps1.find("(\";$env:Path;\").Contains(\";$PathToAdd;\")")
-            .unwrap()
+        ps1.find("PathList-Contains $env:Path $PathToAdd").unwrap()
             < ps1.find("foreach ($entry in $entries)").unwrap(),
         "Windows installer must refresh the current shell PATH even when user PATH already contains Dosh"
     );