fix failing tests

util/ss58.test.ts

@@ -1,4 +1,5 @@
 import { assertEquals, assertInstanceOf } from "../deps/std/testing/asserts.ts"
+import { returnThrows } from "./error.ts"
 import * as ss58 from "./ss58.ts"
 import { alice } from "./test_pairs.ts"
 
@@ -33,26 +34,37 @@ for (
 
 Deno.test("ss58.encode invalid public key length", () => {
   assertInstanceOf(
-    ss58.encode(0, alice.publicKey.slice(0, 30)),
+    returnThrows<ss58.EncodeError>()(() => ss58.encode(0, alice.publicKey.slice(0, 30))),
     ss58.InvalidPublicKeyLengthError,
   )
 })
 
 Deno.test("ss58.encode invalid network prefix", () => {
-  assertInstanceOf(ss58.encode(46, alice.publicKey, [0]), ss58.InvalidNetworkPrefixError)
+  assertInstanceOf(
+    returnThrows<ss58.EncodeError>()(() => ss58.encode(46, alice.publicKey, [0])),
+    ss58.InvalidNetworkPrefixError,
+  )
 })
 
 Deno.test("ss58.decodeRaw long address", () => {
-  assertInstanceOf(ss58.decodeRaw(new Uint8Array(40)), ss58.InvalidAddressLengthError)
+  assertInstanceOf(
+    returnThrows<ss58.DecodeError>()(() => ss58.decodeRaw(new Uint8Array(40))),
+    ss58.InvalidAddressLengthError,
+  )
 })
 
 Deno.test("ss58.decodeRaw short address", () => {
-  assertInstanceOf(ss58.decodeRaw(new Uint8Array(30)), ss58.InvalidAddressLengthError)
+  assertInstanceOf(
+    returnThrows<ss58.DecodeError>()(() => ss58.decodeRaw(new Uint8Array(30))),
+    ss58.InvalidAddressLengthError,
+  )
 })
 
 Deno.test("ss58.decodeRaw invalid checksum", () => {
   assertInstanceOf(
-    ss58.decodeRaw(Uint8Array.of(0, ...alice.publicKey, 255, 255)),
+    returnThrows<ss58.DecodeError>()(() =>
+      ss58.decodeRaw(Uint8Array.of(0, ...alice.publicKey, 255, 255))
+    ),
     ss58.InvalidAddressChecksumError,
   )
 })