OneDrive restore/backup test (#1173)

## Description

GraphConnector test for OneDrive backup and restore. Tests the following:
* restore properly builds the hierarchy for items
* items in folders that have the same name restore properly
* backup properly selects subfolders
* backup separates folders with same name in different parts of
  hierarchy
* input data == backup(restore(input data))

## Type of change

<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [x] 🤖 Test
- [ ] 💻 CI/Deployment
- [ ] 🐹 Trivial/Minor

## Issue(s)

* #913 

## Test Plan

<!-- How will this be tested prior to merging.-->
- [ ] 💪 Manual
- [x] ⚡ Unit test
- [ ] 💚 E2E

.github/workflows/ci.yml

@@ -178,10 +178,11 @@ jobs:
           CORSO_PASSPHRASE: ${{ secrets.INTEGRATION_TEST_CORSO_PASSPHRASE }}
         run: |
           set -euo pipefail
-          go test \
-          -json     \
-          -v        \
-          -failfast \
+          go test       \
+          -tags testing \
+          -json         \
+          -v            \
+          -failfast     \
           ./... 2>&1 | tee ./testlog/gotest.log | gotestfmt -hide successful-tests
 
       # Upload the original go test log as an artifact for later review.

src/.golangci.yml

@@ -1,5 +1,7 @@
 run:
   timeout: 15m
+  build-tags:
+    - testing
 
 linters:
   enable:

src/internal/connector/graph_connector_helper_test.go

@@ -603,6 +603,27 @@ func compareExchangeEvent(
 	checkEvent(t, expectedEvent, itemEvent)
 }
 
+func compareOneDriveItem(
+	t *testing.T,
+	expected map[string][]byte,
+	item data.Stream,
+) {
+	expectedData := expected[item.UUID()]
+	if !assert.NotNil(t, expectedData, "unexpected file with name %s", item.UUID) {
+		return
+	}
+
+	// OneDrive items are just byte buffers of the data. Nothing special to
+	// interpret. May need to do chunked comparisons in the future if we test
+	// large item equality.
+	buf, err := io.ReadAll(item.ToReader())
+	if !assert.NoError(t, err) {
+		return
+	}
+
+	assert.Equal(t, expectedData, buf)
+}
+
 func compareItem(
 	t *testing.T,
 	expected map[string][]byte,
@@ -622,6 +643,10 @@ func compareItem(
 		default:
 			assert.FailNowf(t, "unexpected Exchange category: %s", category.String())
 		}
+
+	case path.OneDriveService:
+		compareOneDriveItem(t, expected, item)
+
 	default:
 		assert.FailNowf(t, "unexpected service: %s", service.String())
 	}

src/internal/connector/graph_connector_test.go

@@ -1,14 +1,19 @@
 package connector
 
 import (
+	"context"
+	"strings"
 	"testing"
 	"time"
 
+	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"github.com/stretchr/testify/suite"
 
+	"github.com/alcionai/corso/src/internal/connector/graph"
 	"github.com/alcionai/corso/src/internal/connector/mockconnector"
+	"github.com/alcionai/corso/src/internal/connector/support"
 	"github.com/alcionai/corso/src/internal/data"
 	"github.com/alcionai/corso/src/internal/tester"
 	"github.com/alcionai/corso/src/pkg/path"
@@ -149,6 +154,31 @@ func (suite *GraphConnectorIntegrationSuite) TestEmptyCollections() {
 // Exchange Functions
 //-------------------------------------------------------------
 
+//revive:disable:context-as-argument
+func mustGetDefaultDriveID(
+	t *testing.T,
+	ctx context.Context,
+	service graph.Service,
+	userID string,
+) string {
+	//revive:enable:context-as-argument
+	d, err := service.Client().UsersById(userID).Drive().Get(ctx, nil)
+	if err != nil {
+		err = errors.Wrapf(
+			err,
+			"failed to retrieve default user drive. user: %s, details: %s",
+			userID,
+			support.ConnectorStackErrorTrace(err),
+		)
+	}
+
+	require.NoError(t, err)
+	require.NotNil(t, d.GetId())
+	require.NotEmpty(t, *d.GetId())
+
+	return *d.GetId()
+}
+
 func runRestoreBackupTest(
 	t *testing.T,
 	test restoreBackupInfo,
@@ -249,6 +279,17 @@ func (suite *GraphConnectorIntegrationSuite) TestRestoreAndBackup() {
 	bodyText := "This email has some text. However, all the text is on the same line."
 	subjectText := "Test message for restore"
 
+	ctx, flush := tester.NewContext()
+	defer flush()
+
+	// Get the default drive ID for the test user.
+	driveID := mustGetDefaultDriveID(
+		suite.T(),
+		ctx,
+		suite.connector.Service(),
+		suite.user,
+	)
+
 	table := []restoreBackupInfo{
 		{
 			name:     "EmailsWithAttachments",
@@ -465,6 +506,95 @@ func (suite *GraphConnectorIntegrationSuite) TestRestoreAndBackup() {
 		// 		},
 		// 	},
 		// },
+		{
+			name:     "OneDriveMultipleFoldersAndFiles",
+			service:  path.OneDriveService,
+			resource: Users,
+			collections: []colInfo{
+				{
+					pathElements: []string{
+						"drives",
+						driveID,
+						"root:",
+					},
+					category: path.FilesCategory,
+					items: []itemInfo{
+						{
+							name:      "test-file.txt",
+							data:      []byte(strings.Repeat("a", 33)),
+							lookupKey: "test-file.txt",
+						},
+					},
+				},
+				{
+					pathElements: []string{
+						"drives",
+						driveID,
+						"root:",
+						"folder-a",
+					},
+					category: path.FilesCategory,
+					items: []itemInfo{
+						{
+							name:      "test-file.txt",
+							data:      []byte(strings.Repeat("b", 65)),
+							lookupKey: "test-file.txt",
+						},
+					},
+				},
+				{
+					pathElements: []string{
+						"drives",
+						driveID,
+						"root:",
+						"folder-a",
+						"b",
+					},
+					category: path.FilesCategory,
+					items: []itemInfo{
+						{
+							name:      "test-file.txt",
+							data:      []byte(strings.Repeat("c", 129)),
+							lookupKey: "test-file.txt",
+						},
+					},
+				},
+				{
+					pathElements: []string{
+						"drives",
+						driveID,
+						"root:",
+						"folder-a",
+						"b",
+						"folder-a",
+					},
+					category: path.FilesCategory,
+					items: []itemInfo{
+						{
+							name:      "test-file.txt",
+							data:      []byte(strings.Repeat("d", 257)),
+							lookupKey: "test-file.txt",
+						},
+					},
+				},
+				{
+					pathElements: []string{
+						"drives",
+						driveID,
+						"root:",
+						"b",
+					},
+					category: path.FilesCategory,
+					items: []itemInfo{
+						{
+							name:      "test-file.txt",
+							data:      []byte(strings.Repeat("e", 257)),
+							lookupKey: "test-file.txt",
+						},
+					},
+				},
+			},
+		},
 	}
 
 	for _, test := range table {