add request method override for browsers

Browsers are not able to send put, delete or any other request from a
plain html form. This limits the possibilities with APIs so an override
was introduced in many frameworks in the form, that `_method` could be
defined in a post payload.
With this, zero also supports `_method` in the post payload to make it
possible to use all functions of the API with javascript through plain
html.

1 files changed, 43 insertions, 0 deletions

diff --git a/spec/unit/zero/request/method_spec.rb b/spec/unit/zero/request/method_spec.rb
index 42ea56a..b9352e1 100644
--- a/spec/unit/zero/request/method_spec.rb
+++ b/spec/unit/zero/request/method_spec.rb
@@ -5,4 +5,47 @@ describe Zero::Request, '#method' do
   let(:env) { EnvGenerator.get('/foo') }
 
   its(:method) { should == :get }
+
+  context 'with post requests' do
+    context 'and _method defined' do
+      let(:env) do
+        EnvGenerator.post('/foo', {
+          :input => '_method=put',
+          'CONTENT_TYPE' => 'multipart/form-data'
+        })
+      end
+      it 'uses _method from the payload to change the method' do
+        expect(subject.method).to be(:put)
+      end
+    end
+
+    context 'and _method not defined' do
+      let(:env) do
+        EnvGenerator.post('/foo', {
+          :input => 'foo=bar',
+          'CONTENT_TYPE' => 'multipart/form-data'
+        })
+      end
+      its(:method) { should == :post }
+    end
+
+    context 'and _method has wrong content' do
+      let(:env) do
+        EnvGenerator.post('/foo', {
+          :input => '_method=foobar',
+          'CONTENT_TYPE' => 'multipart/form-data'
+        })
+      end
+      its(:method) { should == :post }
+    end
+
+    context 'and no payload' do
+      let(:env) do
+        EnvGenerator.post('/foo', {
+          'CONTENT_TYPE' => 'multipart/form-data'
+        })
+      end
+      its(:method) { should == :post }
+    end
+  end
 end