Enforces terms in the web application

This enforces the terms in the web application. These cases are
specced:

- Logging in: When terms are enforced, and a user logs in that has not
  accepted the terms, they are presented with the screen. They get
  directed to their customized root path afterwards.
- Signing up: After signing up, the first screen the user is presented
  with the screen to accept the terms. After they accept they are
  directed to the dashboard.
- While a session is active:
  - For a GET: The user will be directed to the terms page first,
    after they accept the terms, they will be directed to the page
    they were going to
  - For any other request: They are directed to the terms, after they
    accept the terms, they are directed back to the page they came
    from to retry the request. Any information entered would be
    persisted in localstorage and available on the page.

1 files changed, 66 insertions, 0 deletions

diff --git a/spec/controllers/concerns/internal_redirect_spec.rb b/spec/controllers/concerns/internal_redirect_spec.rb
new file mode 100644
index 00000000000..a0ee13b2352
--- /dev/null
+++ b/spec/controllers/concerns/internal_redirect_spec.rb
@@ -0,0 +1,66 @@
+require 'spec_helper'
+
+describe InternalRedirect do
+  let(:controller_class) do
+    Class.new do
+      include InternalRedirect
+
+      def request
+        @request ||= Struct.new(:host, :port).new('test.host', 80)
+      end
+    end
+  end
+  subject(:controller) { controller_class.new }
+
+  describe '#safe_redirect_path' do
+    it 'is `nil` for invalid uris' do
+      expect(controller.safe_redirect_path('Hello world')).to be_nil
+    end
+
+    it 'is `nil` for paths trying to include a host' do
+      expect(controller.safe_redirect_path('//example.com/hello/world')).to be_nil
+    end
+
+    it 'returns the path if it is valid' do
+      expect(controller.safe_redirect_path('/hello/world')).to eq('/hello/world')
+    end
+
+    it 'returns the path with querystring if it is valid' do
+      expect(controller.safe_redirect_path('/hello/world?hello=world#L123'))
+        .to eq('/hello/world?hello=world#L123')
+    end
+  end
+
+  describe '#safe_redirect_path_for_url' do
+    it 'is `nil` for invalid urls' do
+      expect(controller.safe_redirect_path_for_url('Hello world')).to be_nil
+    end
+
+    it 'is `nil` for urls from a with a different host' do
+      expect(controller.safe_redirect_path_for_url('http://example.com/hello/world')).to be_nil
+    end
+
+    it 'is `nil` for urls from a with a different port' do
+      expect(controller.safe_redirect_path_for_url('http://test.host:3000/hello/world')).to be_nil
+    end
+
+    it 'returns the path if the url is on the same host' do
+      expect(controller.safe_redirect_path_for_url('http://test.host/hello/world')).to eq('/hello/world')
+    end
+
+    it 'returns the path including querystring if the url is on the same host' do
+      expect(controller.safe_redirect_path_for_url('http://test.host/hello/world?hello=world#L123'))
+        .to eq('/hello/world?hello=world#L123')
+    end
+  end
+
+  describe '#host_allowed?' do
+    it 'allows uris with the same host and port' do
+      expect(controller.host_allowed?(URI('http://test.host/test'))).to be(true)
+    end
+
+    it 'rejects uris with other host and port' do
+      expect(controller.host_allowed?(URI('http://example.com/test'))).to be(false)
+    end
+  end
+end