Only run shell scrip tests on Unix

Author: alexcrichton

src/cred.rs

@@ -467,6 +467,8 @@ mod test {
 
     #[test]
     fn credential_helper4() {
+        if cfg!(windows) { return } // shell scripts don't work on Windows
+
         let td = TempDir::new("git2-rs").unwrap();
         let path = td.path().join("script");
         File::create(&path).unwrap().write(br"\
@@ -488,6 +490,7 @@ echo username=c
 
     #[test]
     fn credential_helper5() {
+        if cfg!(windows) { return } // shell scripts don't work on Windows
         let td = TempDir::new("git2-rs").unwrap();
         let path = td.path().join("git-credential-script");
         File::create(&path).unwrap().write(br"\
@@ -524,6 +527,7 @@ echo username=c
 
     #[test]
     fn credential_helper7() {
+        if cfg!(windows) { return } // shell scripts don't work on Windows
         let td = TempDir::new("git2-rs").unwrap();
         let path = td.path().join("script");
         File::create(&path).unwrap().write(br"\