Convert keys to symbols when initializing a new ConfigSL::Config.

CHANGELOG.md

@@ -4,7 +4,14 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog][changelog], and this project adheres
 to [Semantic Versioning][versioning].
-ß
+
+## [Unreleased]
+
+### Fixed
+
+- Subclasses of `ConfigSL::Config` initialized with sting keys no longer raise
+  an error.
+
 ## 1.0.0
 
 Initial release.

lib/configsl/config.rb

@@ -19,7 +19,7 @@ class Config
 
     def initialize(params = {})
       params.each do |name, value|
-        set_value(name, value)
+        set_value(name.to_sym, value)
       end
     end
   end

spec/support/configs.rb

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require_relative 'configs/config_spec_config'
 require_relative 'configs/dsl_spec_config'
 require_relative 'configs/format_spec_config'
 require_relative 'configs/from_environment_spec_config'

spec/support/configs/config_spec_config.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class ConfigSpecConfig < ConfigSL::Config
+  option :default, type: String, default: 'rspec-default'
+  option :optional, type: String
+  option :required, type: String, required: true
+end

spec/unit/configsl/config_spec.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+RSpec.describe ConfigSL::Config do
+  subject(:config) { ConfigSpecConfig }
+
+  describe '#initialize' do
+    it 'raises an error for unknown options' do
+      expect { config.new(unknown: 'rspec') }.to \
+        raise_error(ConfigSL::InvalidOptionError)
+    end
+
+    it 'sets values for hash keys' do
+      instance = config.new(required: 'rspec')
+
+      expect(instance.required).to eq('rspec')
+    end
+
+    it 'sets values for string keys' do
+      instance = config.new('required' => 'rspec')
+
+      expect(instance.required).to eq('rspec')
+    end
+  end
+end