fix windows test failures (#736)

lib/google/api_client/client_secrets.rb

@@ -62,7 +62,7 @@ module Google
           search_path ||= File.expand_path('.')
           if File.exists?(File.join(search_path, 'client_secrets.json'))
             filename = File.join(search_path, 'client_secrets.json')
-          elsif search_path == '/' || search_path =~ /[a-zA-Z]:[\/\\]/
+          elsif search_path == File.expand_path('..', search_path)
             raise ArgumentError,
               'No client_secrets.json filename supplied ' +
               'and/or could not be found in search path.'

spec/fixtures/files/test.txt

@@ -1 +1 @@
-Hello world
+Hello world

spec/google/apis/core/upload_spec.rb

@@ -35,7 +35,7 @@ RSpec.describe Google::Apis::Core::RawUploadCommand do
     it 'should send content' do
       command.execute(client)
       expect(a_request(:post, 'https://www.googleapis.com/zoo/animals')
-        .with(body: "Hello world\n")).to have_been_made
+        .with(body: "Hello world")).to have_been_made
     end
 
     it 'should send upload protocol' do
@@ -52,7 +52,7 @@ RSpec.describe Google::Apis::Core::RawUploadCommand do
   end
 
   context('with StringIO input') do
-    let(:file) { StringIO.new("Hello world\n") }
+    let(:file) { StringIO.new("Hello world") }
     include_examples 'should upload'
   end
 
@@ -68,7 +68,7 @@ RSpec.describe Google::Apis::Core::RawUploadCommand do
   context('with Tempfile input') do
     let(:file) do
       temp_file = Tempfile.new("tempfile")
-      temp_file.write("Hello world\n")
+      temp_file.write("Hello world")
       temp_file.rewind
       temp_file
     end