1 files changed, 46 insertions, 0 deletions
diff --git a/test/test-objc-hook.m b/test/test-objc-hook.m
new file mode 100644
index 0000000..ae7d3ff
--- /dev/null
+++ b/test/test-objc-hook.m
@@ -0,0 +1,46 @@
+#include "substitute.h"
+#import <Foundation/Foundation.h>
+
+@interface Base : NSObject {
+}
+- (void)foo:(NSString *)str;
+- (void)bar:(NSString *)str;
+@end
+
+@implementation Base
+- (void)foo:(NSString *)str {
+    NSLog(@"base foo: %@", str);
+}
+- (void)bar:(NSString *)str {
+    NSLog(@"base bar: %@", str);
+}
+@end
+
+@interface Derived : Base {
+}
+@end
+
+@implementation Derived
+- (void)foo:(NSString *)str {
+    NSLog(@"derived foo: %@", str);
+}
+@end
+
+static void (*old_foo)(id, SEL, NSString *);
+static void new_foo(id self, SEL sel, NSString *str) {
+    NSLog(@"new foo: %@; calling orig", str);
+    return old_foo(self, sel, str);
+}
+static void (*old_bar)(id, SEL, NSString *);
+static void new_bar(id self, SEL sel, NSString *str) {
+    NSLog(@"new bar: %@; calling orig", str);
+    return old_bar(self, sel, str);
+}
+
+int main() {
+    assert(!substitute_hook_objc_message([Derived class], @selector(foo:), new_foo, &old_foo, NULL));
+    assert(!substitute_hook_objc_message([Derived class], @selector(bar:), new_bar, &old_bar, NULL));
+    Derived *d = [[Derived alloc] init];
+    [d foo:@"hi!"];
+    [d bar:@"hello!"];
+}