test(LanguageTransltor): Add integration tests for document translation

Author: mamoonraja

resources/translation_doc.txt

@@ -0,0 +1 @@
+How are you?

test/integration/test_language_translator_v3.rb

@@ -17,7 +17,6 @@ def before_all
       )
       @service.add_default_headers(
         headers: {
-          "X-Watson-Learning-Opt-Out" => "1",
           "X-Watson-Test" => "1"
         }
       )
@@ -59,6 +58,42 @@ def test_identify
       refute(service_response.nil?)
     end
 
+    def test_translate_document
+      @service = IBMWatson::LanguageTranslatorV3.new(
+        iam_apikey: ENV["LANGUAGE_TRANSLATOR_APIKEY"],
+        url: ENV["LANGUAGE_TRANSLATOR_URL"],
+        version: "2018-05-01"
+      )
+      @service.add_default_headers(
+        headers: {
+          "X-Watson-Test" => "1"
+        }
+      )
+
+      File.open(Dir.getwd + "/resources/translation_doc.txt") do |file_info|
+        service_response = service.translate_document(
+          file: file_info,
+          model_id: "en-fr"
+        ).result
+        refute(service_response.nil?)
+      end
+    end
+
+    def test_list_documents
+      @service = IBMWatson::LanguageTranslatorV3.new(
+        iam_apikey: ENV["LANGUAGE_TRANSLATOR_APIKEY"],
+        url: ENV["LANGUAGE_TRANSLATOR_URL"],
+        version: "2018-05-01"
+      )
+      @service.add_default_headers(
+        headers: {
+          "X-Watson-Test" => "1"
+        }
+      )
+      service_response = service.list_documents.result
+      refute(service_response.nil?)
+    end
+
     def test_list_identifiable_languages
       service_response = service.list_identifiable_languages.result
       refute(service_response.nil?)

test/unit/test_language_translator_v3.rb

@@ -525,7 +525,7 @@ def test_translate_document
         assert_equal req.headers["Accept"], "application/json"
         assert_match %r{\Amultipart/form-data}, req.headers["Content-Type"]
       end
-    file = File.open(Dir.getwd + "/resources/cnc_test.pdf")
+    file = File.open(Dir.getwd + "/resources/translation_doc.txt")
     service.translate_document(file: file, filename: "file")
   end