WIP Add configuration.

lib/coupon_code.rb

@@ -2,10 +2,12 @@
 require 'digest/sha1'
 require 'coupon_code/version'
 require 'coupon_code/generator'
+require 'coupon_code/configuration'
 require 'coupon_code/validator'
 
 module CouponCode
   SYMBOL = '0123456789ABCDEFGHJKLMNPQRTUVWXY'
   PARTS  = 3
   LENGTH = 4
+  SEPARATOR = '-'
 end

lib/coupon_code/configuration.rb

@@ -0,0 +1,25 @@
+module CouponCode
+  class << self
+    attr_accessor :configuration
+  end
+
+  def self.configuration
+    @configuration ||= Configuration.new
+  end
+
+  def self.configure
+    yield(configuration)
+  end
+
+  def self.reset
+    @configuration = Configuration.new
+  end
+
+  class Configuration
+    attr_accessor :separator
+
+    def initialize
+      @separator = '-'
+    end
+  end
+end

test/configuration_test.rb

@@ -0,0 +1,11 @@
+require 'test_helper'
+
+module CouponCode
+  describe Configuration do
+    it 'separator' do
+      config = Configuration.new
+      config.separator = '*'
+      config.separator.must_equal('*')
+    end
+  end
+end

test/generator_test.rb

@@ -0,0 +1,34 @@
+require 'test_helper'
+
+describe CouponCode do
+  def generate(*args)
+    CouponCode.generate(*args)
+  end
+
+  it 'should be loaded.' do
+    CouponCode.must_respond_to(:generate)
+  end
+
+  it 'should generate a code' do
+    generate.wont_be_empty
+  end
+
+  it 'should only contain uppercase letters, digits, and dashes.' do
+    generate.must_match(/^[0-9A-Z-]+$/)
+  end
+
+  it 'should look like XXXX-XXXX-XXXX.' do
+    generate.must_match(/^\w{4}-\w{4}-\w{4}$/)
+  end
+
+  it 'should generate different codes.' do
+    code1 = generate
+    code2 = generate
+    code1.wont_equal(code2)
+  end
+
+  it 'should generate an arbitrary number of parts.' do
+    generate(parts: 2).must_match(/^\w{4}-\w{4}$/)
+    generate(parts: 5).must_match(/^\w{4}-\w{4}-\w{4}-\w{4}-\w{4}$/)
+  end
+end

test/validator_test.rb

@@ -0,0 +1,63 @@
+require 'test_helper'
+
+describe 'Validator' do
+  it 'should be loaded.' do
+    CouponCode.must_respond_to(:validate)
+  end
+
+  it 'should fail to validate invalid code.' do
+    CouponCode.validate('').must_equal(nil)
+  end
+
+  it 'should accept a valid code.' do
+    CouponCode.validate('1K7Q-CTFM-LMTC').wont_be_nil
+  end
+
+  it 'should reject a short code.' do
+    CouponCode.validate('1K7Q-CTFM').must_be_nil
+  end
+
+  it 'should accept a short code with correct parts.' do
+    CouponCode.validate('1K7Q-CTFM', 2).wont_be_nil
+  end
+
+  it 'should reject a short code with wrong parts.' do
+    CouponCode.validate('CTFM-1K7Q', 2).must_be_nil
+  end
+
+  it 'should fix and validate a lowercase code.' do
+    code = '1k7q-ctfm-lmtc'
+    CouponCode.validate(code.downcase).must_equal(code.upcase)
+  end
+
+  it 'should validate alternative separators.' do
+    code = '1k7q/ctfm/lmtc'
+    CouponCode.validate(code).must_equal('1K7Q-CTFM-LMTC')
+
+    code = '1k7q ctfm lmtc'
+    CouponCode.validate(code).must_equal('1K7Q-CTFM-LMTC')
+
+    code = '1k7qctfmlmtc'
+    CouponCode.validate(code).must_equal('1K7Q-CTFM-LMTC')
+  end
+
+  it 'should valid code-pretest.' do
+    CouponCode.validate('1K7Q', 1).wont_be_nil
+    CouponCode.validate('1K7C', 1).must_be_nil
+
+    CouponCode.validate('1K7Q-CTFM', 2).wont_be_nil
+    CouponCode.validate('1K7Q-CTFW', 2).must_be_nil
+
+    CouponCode.validate('1K7Q-CTFM-LMTC', 3).wont_be_nil
+    CouponCode.validate('1K7Q-CTFM-LMT1', 3).must_be_nil
+
+    CouponCode.validate('7YQH-1FU7-E1HX-0BG9', 4).wont_be_nil
+    CouponCode.validate('7YQH-1FU7-E1HX-0BGP', 4).must_be_nil
+
+    CouponCode.validate('YENH-UPJK-PTE0-20U6-QYME', 5).wont_be_nil
+    CouponCode.validate('YENH-UPJK-PTE0-20U6-QYMT', 5).must_be_nil
+
+    CouponCode.validate('YENH-UPJK-PTE0-20U6-QYME-RBK1', 6).wont_be_nil
+    CouponCode.validate('YENH-UPJK-PTE0-20U6-QYME-RBK2', 6).must_be_nil
+  end
+end