From 39153e074de498f4795cc740694c7432907bce32 Mon Sep 17 00:00:00 2001
From: Andrew Ekstedt <andrew.ekstedt@gmail.com>
Date: Sun, 16 Apr 2023 11:15:00 -0700
Subject: [PATCH] add a test case

---
 Makefile     |  4 ++++
 test/true.sh | 29 +++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100755 test/true.sh

diff --git a/Makefile b/Makefile
index eea76d5..096359b 100644
--- a/Makefile
+++ b/Makefile
@@ -12,3 +12,7 @@ all: true false
 
 %.o: %.s
 	$(AS) -o $@ $<
+
+.PHONY: test
+test:
+	@BIN=. test/true.sh
diff --git a/test/true.sh b/test/true.sh
new file mode 100755
index 0000000..5bba19f
--- /dev/null
+++ b/test/true.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+set -eu
+set -o pipefail
+
+: ${BIN:-..}
+: ${EMU:=qemu-riscv64}
+
+cmd=$BIN/true
+name=true
+
+fail=0
+err() {
+    echo "FAIL $name: $*"
+    fail=1
+}
+
+out=$($EMU $cmd)
+stat=$?
+if [ -n "$out" ]; then
+    err "expected no output"
+fi
+
+if [ "$stat" -ne 0 ]; then
+    err "exited with status code $stat, expected 0"
+fi
+
+if [ "$fail" -eq 0 ]; then
+    echo PASS $name
+fi