Respect the params_encoder in Faraday::Adapter::Test

examples/client_spec.rb

@@ -81,4 +81,17 @@ def sushi(jname, params: {})
       stubs.verify_stubbed_calls
     end
   end
+
+  context 'When the Faraday is configured with FlatParamsEncoder' do
+    let(:conn) { Faraday.new(request: { params_encoder: Faraday::FlatParamsEncoder }) { |b| b.adapter(:test, stubs) } }
+
+    it 'handles the same multiple URL parameters' do
+      stubs.get('/ebi?a=x&a=y&a=z') { [200, { 'Content-Type' => 'application/json' }, '{"name": "shrimp"}'] }
+
+      # uncomment to raise Stubs::NotFound
+      # expect(client.sushi('ebi', params: { a: %w[x y] })).to eq('shrimp')
+      expect(client.sushi('ebi', params: { a: %w[x y z] })).to eq('shrimp')
+      stubs.verify_stubbed_calls
+    end
+  end
 end

examples/client_test.rb

@@ -13,8 +13,8 @@ def initialize(conn)
     @conn = conn
   end
 
-  def sushi(jname)
-    res = @conn.get("/#{jname}")
+  def sushi(jname, params: {})
+    res = @conn.get("/#{jname}", params)
     data = JSON.parse(res.body)
     data['name']
   end
@@ -70,6 +70,45 @@ def test_sushi_exception
     stubs.verify_stubbed_calls
   end
 
+  def test_strict_mode
+    stubs = Faraday::Adapter::Test::Stubs.new(strict_mode: true)
+    stubs.get('/ebi?abc=123') do
+      [
+        200,
+        { 'Content-Type': 'application/javascript' },
+        '{"name": "shrimp"}'
+      ]
+    end
+
+    cli = client(stubs)
+    assert_equal 'shrimp', cli.sushi('ebi', params: { abc: 123 })
+
+    # uncomment to raise Stubs::NotFound
+    # assert_equal 'shrimp', cli.sushi('ebi', params: { abc: 123, foo: 'Kappa' })
+    stubs.verify_stubbed_calls
+  end
+
+  def test_non_default_params_encoder
+    stubs = Faraday::Adapter::Test::Stubs.new(strict_mode: true)
+    stubs.get('/ebi?a=x&a=y&a=z') do
+      [
+        200,
+        { 'Content-Type': 'application/javascript' },
+        '{"name": "shrimp"}'
+      ]
+    end
+    conn = Faraday.new(request: { params_encoder: Faraday::FlatParamsEncoder }) do |builder|
+      builder.adapter :test, stubs
+    end
+
+    cli = Client.new(conn)
+    assert_equal 'shrimp', cli.sushi('ebi', params: { a: %w[x y z] })
+
+    # uncomment to raise Stubs::NotFound
+    # assert_equal 'shrimp', cli.sushi('ebi', params: { a: %w[x y] })
+    stubs.verify_stubbed_calls
+  end
+
   def client(stubs)
     conn = Faraday.new do |builder|
       builder.adapter :test, stubs

lib/faraday/adapter/test.rb

@@ -62,18 +62,20 @@ def empty?
           @stack.empty?
         end
 
-        def match(request_method, host, path, headers, body)
+        # @param env [Faraday::Env]
+        def match(env)
+          request_method = env[:method]
           return false unless @stack.key?(request_method)
 
           stack = @stack[request_method]
           consumed = (@consumed[request_method] ||= [])
 
-          stub, meta = matches?(stack, host, path, headers, body)
+          stub, meta = matches?(stack, env)
           if stub
             consumed << stack.delete(stub)
             return stub, meta
           end
-          matches?(consumed, host, path, headers, body)
+          matches?(consumed, env)
         end
 
         def get(path, headers = {}, &block)
@@ -142,51 +144,41 @@ def new_stub(request_method, path, headers = {}, body = nil, &block)
                 Faraday::Utils.URI(path).host
               ]
             end
-
+          path, query = normalized_path.respond_to?(:split) ? normalized_path.split('?') : normalized_path
           headers = Utils::Headers.new(headers)
-          stub = Stub.new(host, normalized_path, headers, body, @strict_mode, block)
+
+          stub = Stub.new(host, path, query, headers, body, @strict_mode, block)
           (@stack[request_method] ||= []) << stub
         end
 
-        def matches?(stack, host, path, headers, body)
+        # @param stack [Hash]
+        # @param env [Faraday::Env]
+        def matches?(stack, env)
           stack.each do |stub|
-            match_result, meta = stub.matches?(host, path, headers, body)
+            match_result, meta = stub.matches?(env)
             return stub, meta if match_result
           end
           nil
         end
       end
 
       # Stub request
-      # rubocop:disable Style/StructInheritance
-      class Stub < Struct.new(:host, :path, :params, :headers, :body, :strict_mode, :block)
-        # rubocop:enable Style/StructInheritance
-        def initialize(host, full, headers, body, strict_mode, block) # rubocop:disable Metrics/ParameterLists
-          path, query = full.respond_to?(:split) ? full.split('?') : full
-          params =
-            if query
-              Faraday::Utils.parse_nested_query(query)
-            else
-              {}
-            end
-
-          super(host, path, params, headers, body, strict_mode, block)
-        end
+      class Stub < Struct.new(:host, :path, :query, :headers, :body, :strict_mode, :block) # rubocop:disable Style/StructInheritance
+        # @param env [Faraday::Env]
+        def matches?(env)
+          request_host = env[:url].host
+          request_path = Faraday::Utils.normalize_path(env[:url].path)
+          params_encoder = env.request.params_encoder || Faraday::Utils.default_params_encoder
+          request_params = params_encoder.decode(env[:url].query) || {}
+          request_headers = env.request_headers
+          request_body = env[:body]
 
-        def matches?(request_host, request_uri, request_headers, request_body)
-          request_path, request_query = request_uri.split('?')
-          request_params =
-            if request_query
-              Faraday::Utils.parse_nested_query(request_query)
-            else
-              {}
-            end
           # meta is a hash used as carrier
           # that will be yielded to consumer block
           meta = {}
           [(host.nil? || host == request_host) &&
             path_match?(request_path, meta) &&
-            params_match?(request_params) &&
+            params_match?(params_encoder, request_params) &&
             (body.to_s.size.zero? || request_body == body) &&
             headers_match?(request_headers), meta]
         end
@@ -199,7 +191,9 @@ def path_match?(request_path, meta)
           end
         end
 
-        def params_match?(request_params)
+        def params_match?(params_encoder, request_params)
+          params = params_encoder.decode(query) || {}
+
           if strict_mode
             return Set.new(params) == Set.new(request_params)
           end
@@ -239,26 +233,19 @@ def configure
         yield(stubs)
       end
 
+      # @param env [Faraday::Env]
       def call(env)
         super
-        host = env[:url].host
-        normalized_path = Faraday::Utils.normalize_path(env[:url])
-        params_encoder = env.request.params_encoder ||
-                         Faraday::Utils.default_params_encoder
-
-        stub, meta = stubs.match(env[:method], host, normalized_path,
-                                 env.request_headers, env[:body])
+        stub, meta = stubs.match(env)
 
         unless stub
+          normalized_path = Faraday::Utils.normalize_path(env[:url])
           raise Stubs::NotFound, "no stubbed request for #{env[:method]} "\
                                  "#{normalized_path} #{env[:body]}"
         end
 
-        env[:params] = if (query = env[:url].query)
-                         params_encoder.decode(query)
-                       else
-                         {}
-                       end
+        params_encoder = env.request.params_encoder || Faraday::Utils.default_params_encoder
+        env[:params] = params_encoder.decode(env[:url].query) || {}
         block_arity = stub.block.arity
         status, headers, body =
           if block_arity >= 0

spec/faraday/adapter/test_spec.rb

@@ -258,6 +258,38 @@ def make_request
     end
   end
 
+  describe 'for request with non default params encoder' do
+    let(:connection) do
+      Faraday.new(request: { params_encoder: Faraday::FlatParamsEncoder }) do |builder|
+        builder.adapter :test, stubs
+      end
+    end
+    let(:stubs) do
+      described_class::Stubs.new do |stubs|
+        stubs.get('/path?a=x&a=y&a=z') { [200, {}, 'a'] }
+      end
+    end
+
+    context 'when all flat param values are correctly set' do
+      subject(:request) { connection.get('/path?a=x&a=y&a=z') }
+
+      it { expect(request.status).to eq 200 }
+    end
+
+    shared_examples 'raise NotFound when params do not satisfy the flat param values' do |params|
+      subject(:request) { connection.get('/path', params) }
+
+      context "with #{params.inspect}" do
+        it { expect { request }.to raise_error described_class::Stubs::NotFound }
+      end
+    end
+
+    it_behaves_like 'raise NotFound when params do not satisfy the flat param values', { a: %w[x] }
+    it_behaves_like 'raise NotFound when params do not satisfy the flat param values', { a: %w[x y] }
+    it_behaves_like 'raise NotFound when params do not satisfy the flat param values', { a: %w[x z y] } # NOTE: The order of the value is also compared.
+    it_behaves_like 'raise NotFound when params do not satisfy the flat param values', { b: %w[x y z] }
+  end
+
   describe 'strict_mode' do
     let(:stubs) do
       described_class::Stubs.new(strict_mode: true) do |stubs|