add cookie support to response

This commit adds support for response cookies. Response now has a method
cookie to fetch the current cookie. One cookie has multiple crumbs which
represent a key value pair. For each crumb multiple options can be set
according to the specs.

4 files changed, 111 insertions, 0 deletions

diff --git a/spec/unit/zero/response/cookie/add_crumb_spec.rb b/spec/unit/zero/response/cookie/add_crumb_spec.rb
new file mode 100644
index 0000000..3c8dbee
--- /dev/null
+++ b/spec/unit/zero/response/cookie/add_crumb_spec.rb
@@ -0,0 +1,54 @@
+require 'spec_helper'
+
+describe Zero::Response::Cookie, '#add_crumb' do
+  let(:cookie) { Zero::Response::Cookie.new }
+  subject { cookie.add_crumb(key, value, options) }
+  let(:options) { {} }
+  let(:key)     { 'key' }
+  let(:value)   { 'value' }
+
+  before :each do
+    subject
+  end
+
+  context 'with no argument' do
+    it 'adds a new crumb' do
+      expect(cookie.get_crumb(key).key).to be(key)
+    end
+  end
+
+  context 'with flags' do
+    let(:options) { {:flags => [:secure, :http_only]} }
+
+    it 'adds a crumb with secure header' do
+      expect(cookie.get_crumb(key).secure).to be(true)
+    end
+
+    it 'adds a crumb with http_only header' do
+      expect(cookie.get_crumb(key).http_only).to be(true)
+    end
+  end
+
+  context 'with expire' do
+    let(:time) { Time.now }
+    let(:options) { {:expire => time} }
+
+    it 'adds a crumb with expire header' do
+      expect(cookie.get_crumb(key).expire).to be(time)
+    end
+  end
+
+  context 'with domain and path' do
+    let(:domain) { 'libzero.org' }
+    let(:path)   { '/admin' }
+    let(:options) { {:domain => domain, :path => path} }
+
+    it 'adds a crumb with domain header' do
+      expect(cookie.get_crumb(key).domain).to be(domain)
+    end
+
+    it 'adds a crumb with path header' do
+      expect(cookie.get_crumb(key).path).to be(path)
+    end
+  end
+end
diff --git a/spec/unit/zero/response/cookie/get_crumb_spec.rb b/spec/unit/zero/response/cookie/get_crumb_spec.rb
new file mode 100644
index 0000000..3c315db
--- /dev/null
+++ b/spec/unit/zero/response/cookie/get_crumb_spec.rb
@@ -0,0 +1,21 @@
+require 'spec_helper'
+
+describe Zero::Response::Cookie, '#add_crumb' do
+  let(:cookie) { Zero::Response::Cookie.new }
+  subject { cookie.add_crumb(key, value, options) }
+  let(:options) { {} }
+  let(:key)     { 'key' }
+  let(:value)   { 'value' }
+
+  before :each do
+    subject
+  end
+
+  it 'returns the crumb when the crumb exists' do
+    expect(cookie.get_crumb(key).key).to be(key)
+  end
+
+  it 'returns nil for the wrong key' do
+    expect(cookie.get_crumb('wrong key')).to be(nil)
+  end
+end
diff --git a/spec/unit/zero/response/cookie/to_header_spec.rb b/spec/unit/zero/response/cookie/to_header_spec.rb
new file mode 100644
index 0000000..7cdc278
--- /dev/null
+++ b/spec/unit/zero/response/cookie/to_header_spec.rb
@@ -0,0 +1,29 @@
+require 'spec_helper'
+
+describe Zero::Response::Cookie, '#add_crumb' do
+  let(:cookie) { Zero::Response::Cookie.new }
+  subject { cookie.add_crumb(key, value, options) }
+  let(:options) { {
+    :domain => domain,
+    :path   => path,
+    :expire => time,
+    :flags  => flags
+  } }
+  let(:key)     { 'key' }
+  let(:value)   { 'value' }
+  let(:time)    { Time.new }
+  let(:domain)  { 'libzero.org' }
+  let(:path)    { '/admin' }
+  let(:flags)   { [:secure, :http_only] }
+
+  before :each do
+    subject
+  end
+
+  it 'returns the header line' do
+    expect(cookie.to_header).to eq(
+      {'Set-Cookie' => "#{key}=#{value}; Expires=#{time.rfc2822};" +
+                        " Path=#{path}; Domain=#{domain}; HttpOnly; Secure"}
+    )
+  end
+end
diff --git a/spec/unit/zero/response/to_a_spec.rb b/spec/unit/zero/response/to_a_spec.rb
index b016eb9..b547f98 100644
--- a/spec/unit/zero/response/to_a_spec.rb
+++ b/spec/unit/zero/response/to_a_spec.rb
@@ -69,5 +69,12 @@ describe Zero::Response do
       value[1].should eq({})  # Headers
       value[2].should eq([])  # Body
     end
+
+    it "adds the cookie to the headers" do
+      key = 'key'
+      value = 'value'
+      subject.cookie.add_crumb(key, value)
+      expect(subject.to_a[1]['Set-Cookie']).to eq("#{key}=#{value}")
+    end
   end
 end