From 5feb67285dae5f0039046a26ac5d49923d6970aa Mon Sep 17 00:00:00 2001
From: Gwilym Inzani <email@gwilym.dev>
Date: Tue, 17 Oct 2023 23:49:57 +0100
Subject: [PATCH] Add a test that multiboot works

---
 agb/tests/test_multiboot.rs | 23 +++++++++++++++++++++++
 justfile                    |  3 +++
 2 files changed, 26 insertions(+)
 create mode 100644 agb/tests/test_multiboot.rs

diff --git a/agb/tests/test_multiboot.rs b/agb/tests/test_multiboot.rs
new file mode 100644
index 00000000..5fe0247a
--- /dev/null
+++ b/agb/tests/test_multiboot.rs
@@ -0,0 +1,23 @@
+#![no_std]
+#![no_main]
+#![feature(custom_test_frameworks)]
+#![reexport_test_harness_main = "test_main"]
+#![test_runner(agb::test_runner::test_runner)]
+
+fn hello() {}
+
+#[test_case]
+fn multiboot_test(_gba: &mut agb::Gba) {
+    if option_env!("AGB_MULTIBOOT").is_some() {
+        let address = hello as usize;
+        assert!(
+            (0x0200_0000..0x0204_0000).contains(&address),
+            "multiboot functions should all be in ewram 0x0300_0000 and 0x0300_8000, but was actually found to be at {address:#010X}"
+        );
+    }
+}
+
+#[agb::entry]
+fn entry(_gba: agb::Gba) -> ! {
+    loop {}
+}
diff --git a/justfile b/justfile
index bfac29b9..1aee24b2 100644
--- a/justfile
+++ b/justfile
@@ -15,6 +15,7 @@ clippy:
 
 test:
     just _test-debug agb
+    just _test-multiboot
     just _test-debug agb-fixnum
     just _test-debug agb-hashmap
     just _test-debug tracker/agb-tracker
@@ -152,6 +153,8 @@ _test-debug crate:
     (cd "{{crate}}" && cargo test)
 _test-debug-arm crate:
     (cd "{{crate}}" && cargo test --target=armv4t-none-eabi)
+_test-multiboot:
+    (cd "agb" && AGB_MULTIBOOT=true RUSTFLAGS="-Clink-arg=-Tgba_mb.ld -Ctarget-cpu=arm7tdmi" cargo test --test=test_multiboot)
 _clippy crate:
     (cd "{{crate}}" && cargo clippy --examples --tests -- {{CLIPPY_ARGUMENTS}})
 _clean crate: