The /testforblocks command allows you to check whether or not two areas are equal.
/testforblocks <x1> <y1> <z1> <x2> <y2> <z2> <x> <y> <z> [all|masked]
Example, checking if the area between 0,64,0 and 4,64,4 is the same as 100,64,100 to 104,64,104:
/testforblocks 0 64 0 4 64 4 100 64 100
If you want to detect blocks, then /testforblocks is what you're looking for. /testfor is used to find entities, such as players, mobs or items.
/testforblocks is used as follows:
testforblocks <x1> <y1> <z1> <x2> <y2> <z2> <x> <y> <z> [mode]
from Minecraft Wiki:
Arguments:
x1 y1 z1 and x2 y2 z2:
Specifies two opposing corners of the
region to use as the pattern to test for (the "source region"). x1,
z1, x2, and z2 must all be between -30,000,000 and 30,000,000
(inclusive, without the commas), and y1 and y2 must be between 0 and
255 (inclusive). May use tilde notation to specify coordinates
relative to the command's position. The number of blocks in the source
region must not exceed 524,288.
x y z Specifies the lower northwestern
corner (the corner with the most-negative values) of the region to be
checked (the "destination region"). x and z must both be between
-30,000,000 and 30,000,000 (inclusive, without the commas), and y must be between 0 and 255 (inclusive). May use tilde notation to specify
coordinates relative to the command's position. Source and destination
regions may overlap.
mode (optional)
Specifies how to match blocks.
Must be one of:
all — every block in the source and destination
regions must match exactly.
masked — air blocks in the source region
will match any block in the destination region. If not specified,
defaults to all.
To use testforblocks, you will need an area on your map to compare against - this will need to be in a loaded chunk, so I would put it underground and out of sight somewhere.
Best Answer
You can use the
filteredparameter.