From da28a542c7b8dc1ba9bd734219871cf0f935b215 Mon Sep 17 00:00:00 2001
From: Greg Hysen <greg.hysen@gmail.com>
Date: Thu, 1 Aug 2019 18:54:23 +0200
Subject: [PATCH] Added abi encoder test when bad selector is passed to method
 decoding

---
 packages/utils/test/abi_encoder/methods_test.ts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/packages/utils/test/abi_encoder/methods_test.ts b/packages/utils/test/abi_encoder/methods_test.ts
index c167db4726..5506e361fc 100644
--- a/packages/utils/test/abi_encoder/methods_test.ts
+++ b/packages/utils/test/abi_encoder/methods_test.ts
@@ -282,4 +282,16 @@ describe('ABI Encoder: Method Encoding / Decoding', () => {
         const customDecodingRules = { shouldConvertStructsToObjects: true }; // custom to improve readability
         runTest(method, methodArgs, expectedEncoding, defaultEncodingRules, customDecodingRules);
     });
+    it('Should throw if decoding calldata where selector does not match the method', async () => {
+        const method = AbiEncoder.createMethod('foobar');
+        const methodSelector = method.getSelector();
+        const badMethodSelector = '0x01020304';
+        expect(() => method.decode(badMethodSelector)).to.throw(`Tried to decode calldata, but it was missing the function selector. Expected prefix '${methodSelector}'. Got '${badMethodSelector}'.`);
+    });
+    it('Should throw if strict decoding calldata where selector does not match the method', async () => {
+        const method = AbiEncoder.createMethod('foobar');
+        const methodSelector = method.getSelector();
+        const badMethodSelector = '0x01020304';
+        expect(() => method.strictDecode<void>(badMethodSelector)).to.throw(`Tried to decode calldata, but it was missing the function selector. Expected prefix '${methodSelector}'. Got '${badMethodSelector}'.`);
+    });
 });