Handled the FlexVol resize when the optimal FlexVol size couldn't be calculated

Signed-off-by: Sudha Kumari <[email protected]>

Author: sudhakumari1

storage_drivers/ontap/ontap_nas_qtree.go

@@ -2447,6 +2447,7 @@ func (d *NASQtreeStorageDriver) resizeFlexvol(ctx context.Context, flexvol strin
 		if err = d.API.VolumeSetSize(ctx, flexvol, "+"+size); err != nil {
 			return fmt.Errorf("flexvol resize failed: %v", err)
 		}
+		return nil
 	}
 
 	// Got optimal size, so just set the Flexvol to that value

storage_drivers/ontap/ontap_nas_qtree_test.go

@@ -3781,6 +3781,22 @@ func TestResizeFlexvol_Success_WithoutOptimalSize(t *testing.T) {
 	assert.NoError(t, result, "Flexvol resize failed")
 }
 
+func TestResizeFlexvol_FallbackPath_VolumeSetSizeSuccess(t *testing.T) {
+	volName := "vol1"
+	ctx := context.Background()
+	resizeToInBytes := uint64(10737418240) // 10g
+
+	mockAPI, driver := newMockOntapNasQtreeDriver(t)
+
+	// Simulate getOptimalSizeForFlexvol returning an error (simulate error in VolumeInfo)
+	mockAPI.EXPECT().VolumeInfo(ctx, volName).Return(nil, fmt.Errorf("mock error"))
+	// Expect VolumeSetSize to be called with "+" and the requested size, and succeed
+	mockAPI.EXPECT().VolumeSetSize(ctx, volName, "+"+strconv.FormatUint(resizeToInBytes, 10)).Return(nil).Times(1)
+
+	err := driver.resizeFlexvol(ctx, volName, resizeToInBytes)
+	assert.NoError(t, err, "Expected resizeFlexvol to return nil when VolumeSetSize succeeds in fallback path")
+}
+
 func TestResizeFlexvol_WithErrorInApiOperation(t *testing.T) {
 	volName := "vol1"
 	volInfo, _ := MockGetVolumeInfo(ctx, volName)