move the remaining RippleAPI tests to the new test runner

test/api/errors/index.ts

@@ -0,0 +1,19 @@
+import assert from 'assert-diff'
+import { TestSuite } from '../../utils'
+
+/**
+ * Every test suite exports their tests in the default object.
+ * - Check out the "TestSuite" type for documentation on the interface.
+ * - Check out "test/api/index.ts" for more information about the test runner.
+ */
+export default <TestSuite>{
+  'RippleError with data': async (api, address) => {
+    const error = new api.errors.RippleError('_message_', '_data_')
+    assert.strictEqual(error.toString(), "[RippleError(_message_, '_data_')]")
+  },
+
+  'NotFoundError default message': async (api, address) => {
+    const error = new api.errors.NotFoundError()
+    assert.strictEqual(error.toString(), '[NotFoundError(Not found)]')
+  }
+}