onedrive: add support for china region operated by 21vianet #4963 (#4963)

fixes #3804
obsoletes #3973
obsoletes #4072

backend/onedrive/onedrive_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	"github.com/rclone/rclone/fs"
+	"github.com/rclone/rclone/fstest"
 	"github.com/rclone/rclone/fstest/fstests"
 )
 
@@ -19,6 +20,20 @@ func TestIntegration(t *testing.T) {
 	})
 }
 
+// TestIntegrationCn runs integration tests against the remote
+func TestIntegrationCn(t *testing.T) {
+	if *fstest.RemoteName != "" {
+		t.Skip("skipping as -remote is set")
+	}
+	fstests.Run(t, &fstests.Opt{
+		RemoteName: "TestOneDriveCn:",
+		NilObject:  (*Object)(nil),
+		ChunkedUpload: fstests.ChunkedUploadConfig{
+			CeilChunkSize: fstests.NextMultipleOf(chunkSizeMultiple),
+		},
+	})
+}
+
 func (f *Fs) SetUploadChunkSize(cs fs.SizeSuffix) (fs.SizeSuffix, error) {
 	return f.setUploadChunkSize(cs)
 }