Disable the test harness for the should_panic test

Cargo.toml

@@ -4,6 +4,10 @@ version = "0.1.0"
 authors = ["Philipp Oppermann <dev@phil-opp.com>"]
 edition = "2018"
 
+[[test]]
+name = "should_panic"
+harness = false
+
 [dependencies]
 bootloader = "0.6.4"
 volatile = "0.2.3"

tests/should_panic.rs

@@ -1,27 +1,20 @@
 #![no_std]
 #![no_main]
-#![feature(custom_test_frameworks)]
-#![test_runner(test_runner)]
-#![reexport_test_harness_main = "test_main"]
 
 use blog_os::{exit_qemu, serial_print, serial_println, QemuExitCode};
 use core::panic::PanicInfo;
 
 #[no_mangle]
 pub extern "C" fn _start() -> ! {
-    test_main();
-
+    should_fail();
+    serial_println!("[test did not panic]");
+    exit_qemu(QemuExitCode::Failed);
     loop {}
 }
 
-pub fn test_runner(tests: &[&dyn Fn()]) {
-    serial_println!("Running {} tests", tests.len());
-    if let Some(test) = tests.first() {
-        test();
-        serial_println!("[test did not panic]");
-        exit_qemu(QemuExitCode::Failed);
-    }
-    exit_qemu(QemuExitCode::Success);
+fn should_fail() {
+    serial_print!("should_fail... ");
+    assert_eq!(0, 1);
 }
 
 #[panic_handler]
@@ -30,9 +23,3 @@ fn panic(_info: &PanicInfo) -> ! {
     exit_qemu(QemuExitCode::Success);
     loop {}
 }
-
-#[test_case]
-fn should_fail() {
-    serial_print!("should_fail... ");
-    assert_eq!(0, 1);
-}