Implement send_message correctly

Author: smasato

lib/devin_api/endpoints/session.rb

@@ -21,7 +21,7 @@ def get_session(session_id)
       # @option params [String] :message The message to send (required)
       # @return [Hash] Response body
       def send_message(session_id, params = {})
-        post("/v1/session/#{session_id}/messages", params)
+        post("/v1/session/#{session_id}/message", params)
       end
 
       # Update session tags

lib/devin_api/resources/session.rb

@@ -15,7 +15,7 @@ def path
       end
 
       def send_message(message)
-        client.post("#{path}/messages", { message: message })
+        client.post("#{path}/message", { message: message })
       end
 
       def update_tags(tags)

spec/core/endpoints/session_spec.rb

@@ -37,7 +37,7 @@
 
   describe '#send_message' do
     before do
-      stub_request(:post, 'https://api.example.com/v1/session/devin-xxx/messages')
+      stub_request(:post, 'https://api.example.com/v1/session/devin-xxx/message')
         .with(
           body: { message: 'Can you explain this code?' }.to_json,
           headers: { 'Content-Type' => 'application/json' }

spec/core/endpoints/sessions_spec.rb

@@ -108,7 +108,7 @@
 
   describe '#send_message' do
     before do
-      stub_request(:post, 'https://api.example.com/v1/session/devin-xxx/messages')
+      stub_request(:post, 'https://api.example.com/v1/session/devin-xxx/message')
         .with(
           body: { message: 'Can you explain this code?' }.to_json,
           headers: { 'Content-Type' => 'application/json' }