Skip interrupt tests on windows

tests/interrupts.rs

@@ -7,6 +7,13 @@ use executable_path::executable_path;
 use tempdir::TempDir;
 use std::{process::Command, time::{Duration, Instant}, thread};
 
+#[cfg(unix)]
+fn kill(process_id: u32) {
+  unsafe {
+    libc::kill(process_id as i32, libc::SIGINT);
+  }
+}
+
 fn interrupt_test(justfile: &str) {
   let tmp = TempDir::new("just-interrupts")
     .unwrap_or_else(
@@ -25,9 +32,7 @@ fn interrupt_test(justfile: &str) {
 
   thread::sleep(Duration::new(1, 0));
 
-  unsafe {
-    libc::kill(child.id() as i32, libc::SIGINT);
-  }
+  kill(child.id());
 
   let status = child.wait().unwrap();
 
@@ -44,29 +49,32 @@ fn interrupt_test(justfile: &str) {
   assert_eq!(status.code(), Some(130));
 }
 
+#[cfg(unix)]
 #[test]
-fn shebang_interrupt() {
+fn interrupt_shebang() {
   interrupt_test("
 default:
   #!/usr/bin/env sh
   sleep 2
 ");
 }
 
+#[cfg(unix)]
 #[test]
-fn line_interrupt() {
+fn interrupt_line() {
   interrupt_test("
 default:
-  sleep 2
+  @sleep 2
 ");
 }
 
+#[cfg(unix)]
 #[test]
-fn backtick_interrupt() {
+fn interrupt_backtick() {
   interrupt_test("
 foo = `sleep 2`
 
 default:
-  echo hello
+  @echo hello
 ");
 }