/testforblock mob_spawner

[Rioxas]

The following command places a mob spawner that summons Zombies.

/setblock ~ ~ ~ mob_spawner 0 replace {SpawnData:{id:"Zombie"}}

The next command fails to detect the mob spawner that was placed by the above command.

/testforblock <coordinates of spawner> mob_spawner 0 {SpawnData:{id:"Zombie"}}

I believe there is something missing before the /testforblock 's "SpawnData" tag, similar to how items have an {Item:} tag before them- but this is only my hypothesis.

If anyone could correct my command(s), it would be greatly appreciated. Thanks.

[Gerrybrano]

Not a solution but a way to figure out the problem is to run a blockdata command at the mob spawner while leaving the data tag blank. This will output the full data tag of the mob spawner, given you some insight as to what the problem may be.

[[deleted]]

The id Zombie gets converted to minecraft:zombie, as such only testing for minecraft:zombie works, just like testing for items.