     assert.equal analyser.symmetries.length, 7
 
 
+describe "MemoAnalyser::analyse", ->
   it "must detect spaceship's parameters: offset, period", ->
     analyser = new MemoAnalyser NamedRules.singleRotate
     pattern = Cells.from_rle "$2o2$2o"

    assert.equal result.dy, 0
    assert.equal result.period, 12


 NamedRules} = require "../scripts-src/rules"


describe "MemoAnalyser::constructor", ->
  it "must find 3 spatial invariant transforms (rotations) for a SingleRotate rule",->
    analyser = new MemoAnalyser NamedRules.singleRotate
    assert.equal analyser.symmetries.length, 3
