test: Add simple e2e test runner

test/run_tests.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+BASEFOLDER=$(dirname "$PWD")
+INPUT_FILES=$(find "$BASEFOLDER" -type f -name "*.c0")
+
+"$BASEFOLDER"/build.sh
+echo "$INPUT_FILES"
+
+echo
+echo TESTING
+echo
+
+for f in $INPUT_FILES; do
+    out_file=$f.s
+    expected_file=$f.expected
+    echo -n Testing "$(basename \""$f")" "$(basename \""$out_file")"
+    "$BASEFOLDER"/run.sh "$f" "$out_file" &> /dev/null
+    if test $? -ne 0; then
+        echo " FAILED <Compiler error>"
+        continue
+    fi
+    diff -q "$out_file" "$expected_file" > /dev/null
+    if test $? -eq 0; then
+        echo " PASSED"
+        rm "$out_file"
+    else
+        echo " FAILED <Invalid result>"
+        diff "$out_file" "$expected_file"
+    fi
+done

test/simple_return.c0

@@ -0,0 +1,3 @@
+int main () {
+    return 0;
+}

test/simple_return.c0.expected

@@ -0,0 +1,14 @@
+.global main
+.global _main
+.text
+main:
+call _main
+# move the return value into the first argument for the syscall
+movq %rax, %rdi
+# move the exit syscall number into rax
+movq $0x3C, %rax
+syscall
+_main:
+# your generated code here
+  mov $0,%0
+  ret