From 1af57292e1e7be8be346258406a1838437b816fb Mon Sep 17 00:00:00 2001
From: Nikita Shilnikov <fg@flashgordon.ru>
Date: Sat, 14 Dec 2019 14:15:24 +0300
Subject: [PATCH] Test invalid exception message

---
 spec/dry/types/errors_spec.rb | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 spec/dry/types/errors_spec.rb

diff --git a/spec/dry/types/errors_spec.rb b/spec/dry/types/errors_spec.rb
new file mode 100644
index 00000000..25939562
--- /dev/null
+++ b/spec/dry/types/errors_spec.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+RSpec.describe 'dry types errors' do
+  describe Dry::Types::CoercionError do
+    it 'requires a string message' do
+      expect {
+        described_class.new(:invalid)
+      }.to raise_error(ArgumentError, /message must be a string/)
+    end
+  end
+end