Dummy contract

drink/src/contract_api.rs

@@ -168,7 +168,7 @@ mod tests {
     #[test]
     fn can_upload_code() {
         let mut sandbox = Sandbox::<MinimalRuntime>::new().unwrap();
-        let wasm_binary = compile_module("transfer");
+        let wasm_binary = compile_module("dummy");
         let hash = <<MinimalRuntime as frame_system::Config>::Hashing>::hash(&wasm_binary);
 
         let result = sandbox.upload_contract(wasm_binary, DEFAULT_ACTOR, None);
@@ -180,7 +180,7 @@ mod tests {
     #[test]
     fn can_deploy_contract() {
         let mut sandbox = Sandbox::<MinimalRuntime>::new().unwrap();
-        let wasm_binary = compile_module("transfer");
+        let wasm_binary = compile_module("dummy");
 
         let events_before = sandbox.get_current_block_events();
         assert!(events_before.is_empty());
@@ -208,7 +208,7 @@ mod tests {
     #[test]
     fn can_call_contract() {
         let mut sandbox = Sandbox::<MinimalRuntime>::new().unwrap();
-        let wasm_binary = compile_module("transfer");
+        let wasm_binary = compile_module("dummy");
 
         let result = sandbox.deploy_contract(
             wasm_binary,

drink/test-resources/dummy.wat

@@ -0,0 +1,25 @@
+;; Dummy contract emitting a dummy event.
+(module
+	(import "seal0" "seal_deposit_event" (func $seal_deposit_event (param i32 i32 i32 i32)))
+	(import "seal0" "seal_return" (func $seal_return (param i32 i32 i32)))
+	(import "env" "memory" (memory 1 1))
+
+	(func (export "deploy"))
+
+	(func (export "call")
+		;; emit dummy event
+    (call $seal_deposit_event
+      (i32.const 0) ;; The topics buffer
+      (i32.const 0) ;; The topics buffer's length
+      (i32.const 8) ;; The data buffer
+      (i32.const 4) ;; The data buffer's length
+    )
+
+		;; exit with success
+		(call $seal_return
+			(i32.const 0)	;; flags
+			(i32.const 0)	;; returned value
+			(i32.const 4)	;; length of returned value
+		)
+	)
+)