Add tests

gems/aws-sdk-core/spec/aws/query/ec2_param_builder_spec.rb

@@ -5,33 +5,52 @@
 module Aws
   module Query
     describe EC2ParamBuilder do
-
       let(:shapes) { ApiHelper.sample_shapes }
 
-      let(:rules) {
-        ApiHelper.sample_api(shapes:shapes).
-          operation(:example_operation).
-          input
-      }
+      let(:rules) do
+        ApiHelper
+          .sample_api(shapes: shapes)
+          .operation(:example_operation)
+          .input
+      end
 
       def query(params = {})
         param_list = ParamList.new
         EC2ParamBuilder.new(param_list).apply(rules, params)
-        param_list.map { |param| [param.name, param.value ] }.sort
+        param_list.map { |param| [param.name, param.value] }.sort
       end
 
       it 'can serialize structures' do
         params = Structure.new(*rules.shape.member_names).new
         params.boolean = true
         params.integer = 123
         params.string = 'abc'
-        expect(query(params)).to eq([
-          ['Boolean', 'true'],
-          ['Integer', '123'],
-          ['String', 'abc'],
-        ])
+        expect(query(params)).to eq(
+          [
+            %w[Boolean true],
+            %w[Integer 123],
+            %w[String abc]
+          ]
+        )
       end
 
+      it 'can serialize non-empty lists' do
+        params = Structure.new(*rules.shape.member_names).new
+        params.number_list = [1, 2, 3]
+        expect(query(params)).to eq(
+          [
+            %w[NumberList.1 1],
+            %w[NumberList.2 2],
+            %w[NumberList.3 3]
+          ]
+        )
+      end
+
+      it 'does not serialize empty lists' do
+        params = Structure.new(*rules.shape.member_names).new
+        params.number_list = []
+        expect(query(params)).to be_empty
+      end
     end
   end
 end