Testing cct -d 8 +proj=merc +R=1
   1.57079633     0.88137359    0.00000000           inf

Testing echo 0.5 2 | cct -z 0 -t 0 +proj=pipeline +step +proj=unitconvert +xy_in=deg +xy_out=rad
  0.5000000000    2.0000000000        0.0000        0.0000
Testing echo 0.5 2 | cct -z 0 -t 0 +proj=pipeline +step +proj=unitconvert +xy_in=deg +xy_out=deg
  0.5000000000    2.0000000000        0.0000        0.0000
Testing echo 0.5 2 | cct -z 0 -t 0 +proj=pipeline +step +proj=unitconvert +xy_in=m +xy_out=km
       0.0005         0.0020        0.0000        0.0000

Testing echo 0.5 2 | cct -d 6 -z 0 -t 0 +proj=pipeline +step +proj=unitconvert +xy_in=deg +xy_out=rad
      0.500000        2.000000      0.000000        0.0000
Testing echo 0.5 2 | cct -d 6 -z 0 -t 0 +proj=pipeline +step +proj=unitconvert +xy_in=deg +xy_out=deg
      0.500000        2.000000      0.000000        0.0000
Testing echo 0.5 2 | cct -d 6 -z 0 -t 0 +proj=pipeline +step +proj=unitconvert +xy_in=m +xy_out=km
     0.000500       0.002000      0.000000        0.0000