define
set a 1
----

get a
----
1

get b
----
pebble: not found

define
set a 1
set a 2
----

get a
----
2

define
set a 1
set a 2
del a
----

get a
----
pebble: not found

define
set a 1
set a 2
del a
set a 3
----

get a
----
3

define
merge a 1
merge a 2
merge a 3
----

get a
----
123

commit
----

define
merge a 4
----

get a
----
1234

commit
----

define
del a
set a 5
----

get a
----
5

define
del-range a b
----

get a
----
pebble: not found

commit
----

define
----

get a
----
pebble: not found

define
merge b 1
merge b 2
del-range b c
merge b 3
merge b 4
----

get b
----
34

commit
----

define
----

get b
----
34
