fix: configuration validation and test coverage setup

- Fix Configuration class to properly validate API key
- Update Client class initialization to handle missing API key
- Configure SimpleCov for proper test coverage reporting
- Add CodeClimate test coverage integration

lib/deepseek/client.rb

@@ -12,7 +12,7 @@ def initialize(api_key: nil, **options)
       options.each do |key, value|
         @config.send("#{key}=", value) if @config.respond_to?("#{key}=")
       end
-      @config.validate!
+      @config.validate! # This will raise ConfigurationError if no API key is set
     end
 
     def chat(messages:, model: 'deepseek-chat', **params)

lib/deepseek/configuration.rb

@@ -7,10 +7,11 @@ def initialize
       @api_base_url = ENV['DEEPSEEK_API_BASE_URL'] || 'https://api.deepseek.com'
       @timeout = ENV['DEEPSEEK_TIMEOUT']&.to_i || 30
       @max_retries = ENV['DEEPSEEK_MAX_RETRIES']&.to_i || 3
+      validate! unless api_key.nil? # Don't validate during initialization
     end
 
     def validate!
-      raise ConfigurationError, 'API key must be set' if api_key.nil? || api_key.empty?
+      raise ConfigurationError, 'API key must be set' if api_key.nil? || api_key.strip.empty?
     end
   end
 end

spec/spec_helper.rb

@@ -1,17 +1,22 @@
 require 'simplecov'
 require 'simplecov-cobertura'
 
+# Configure SimpleCov
 SimpleCov.start do
-  enable_coverage :branch
-
   add_filter '/spec/'
   add_filter '/vendor/'
 
-  add_group 'Client', 'lib/deepseek/client'
-  add_group 'Configuration', 'lib/deepseek/configuration'
-  add_group 'Errors', 'lib/deepseek/errors'
+  enable_coverage :branch
+
+  # Add groups for better organization
+  add_group 'Client', 'lib/deepseek/client.rb'
+  add_group 'Configuration', 'lib/deepseek/configuration.rb'
+  add_group 'Errors', 'lib/deepseek/errors.rb'
+
+  track_files 'lib/**/*.rb'
 end
 
+# Set formatter for CodeClimate
 SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter.new([
   SimpleCov::Formatter::HTMLFormatter,
   SimpleCov::Formatter::CoberturaFormatter
@@ -21,22 +26,18 @@
 require 'webmock/rspec'
 
 RSpec.configure do |config|
-  # Enable flags like --only-failures and --next-failure
-  config.example_status_persistence_file_path = ".rspec_status"
-
-  # Disable RSpec exposing methods globally on `Module` and `main`
-  config.disable_monkey_patching!
-
-  config.expect_with :rspec do |c|
-    c.syntax = :expect
+  config.expect_with :rspec do |expectations|
+    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
   end
 
-  # Clean up after each test
-  config.after(:each) do
-    Deepseek.reset_configuration!
+  config.mock_with :rspec do |mocks|
+    mocks.verify_partial_doubles = true
   end
 
-  # Configure WebMock
+  config.shared_context_metadata_behavior = :apply_to_host_groups
+  config.order = :random
+  config.example_status_persistence_file_path = "spec/examples.txt"
+
   config.before(:each) do
     WebMock.disable_net_connect!
   end