Try to fix test error on Windows

Author: phil-opp

example-kernels/tester/build.rs

@@ -4,7 +4,7 @@ fn main() {
     let out_dir = env::var("OUT_DIR").unwrap();
     let dest_path = Path::new(&out_dir).join("generated_tests.rs");
     let mut tests = File::create(&dest_path).unwrap();
-    for entry in Path::new("tests/integration_tests").read_dir().expect("failed to read tests/integration tests") {
+    for entry in Path::new("tests").join("integration_tests").read_dir().expect("failed to read tests/integration tests") {
         let entry = entry.expect("failed to read dir entry");
         assert!(entry.file_type().unwrap().is_file());
         let test_path = entry.path();

example-kernels/tester/tests/integration_tests.rs

@@ -1,9 +1,11 @@
+use std::path::Path;
+
 include!(env!("GENERATED_TESTS"));
 
 fn run_test(test_path: &str) {
     let mut cmd = std::process::Command::new("bootimage");
     cmd.arg("tester");
-    cmd.arg(test_path);
+    cmd.arg(Path::new(test_path));
     cmd.arg("--target");
     cmd.arg("../x86_64-bootimage-example-kernels.json");
     let output = cmd.output().expect("failed to run bootimage");