sharness: `fusermount -u` is the documented way to unmount FUSE on Linux

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

test/sharness/lib/test-lib.sh

@@ -215,12 +215,20 @@ test_launch_ipfs_daemon() {
 	fi
 }
 
+do_umount() {
+    if [ "$(uname -s)" = "Linux" ]; then
+	fusermount -u "$1"
+    else
+	umount "$1"
+    fi
+}
+
 test_mount_ipfs() {
 
 	# make sure stuff is unmounted first.
 	test_expect_success FUSE "'ipfs mount' succeeds" '
-		umount "$(pwd)/ipfs" || true &&
-		umount "$(pwd)/ipns" || true &&
+		do_umount "$(pwd)/ipfs" || true &&
+		do_umount "$(pwd)/ipns" || true &&
 		ipfs mount >actual
 	'