Specialize the NOSCRIPT error

Author: byroot

CHANGELOG.md

@@ -1,5 +1,7 @@
 # Unreleased
 
+- Add `RedisClient::NoScriptError` for `EVALSHA`.
+
 # 0.24.0
 
 - Allow `sentinel_password` to be provided as a `Proc`.

lib/redis_client.rb

@@ -153,6 +153,7 @@ def parse(error_message)
   PermissionError = Class.new(CommandError)
   WrongTypeError = Class.new(CommandError)
   OutOfMemoryError = Class.new(CommandError)
+  NoScriptError = Class.new(CommandError)
 
   ReadOnlyError = Class.new(ConnectionError)
   ReadOnlyError.include(HasCommand)
@@ -167,6 +168,7 @@ def parse(error_message)
     "MASTERDOWN" => MasterDownError,
     "WRONGTYPE" => WrongTypeError,
     "OOM" => OutOfMemoryError,
+    "NOSCRIPT" => NoScriptError,
   }.freeze
 
   class << self

test/redis_client/connection_test.rb

@@ -280,6 +280,12 @@ def test_oom_errors
       end
     end
 
+    def test_script_errors
+      assert_raises RedisClient::NoScriptError do
+        @redis.call("EVALSHA", "invalid", 0)
+      end
+    end
+
     private
 
     def assert_timeout(error, faster_than = ClientTestHelper::DEFAULT_TIMEOUT + 0.2, &block)