nodobjc-x/test/archive/core/introspection.js

The Node.js ⇆ Objective-C bridge

var b = require('../../lib/core')
  , ffi = require('node-ffi')
  , assert = require('assert')
  , className = 'NSMutableArray'

var c = b.objc_getClass(className)

assert.ok(!c.isNull())

var name = b.class_getName(c)
assert.equal(typeof name, 'string')
assert.equal(name, className)
//console.error('class_getName: %s', name)

var numMethods = new ffi.Pointer(ffi.Bindings.TYPE_SIZE_MAP.uint32)
  , methods = b.class_copyMethodList(c, numMethods)
  , p = methods
numMethods = numMethods.getUInt32()
assert.ok(numMethods > 0)

for (var i=0; i<numMethods; i++) {
  var cur = p.getPointer()
    , name = b.sel_getName(b.method_getName(cur))
    , numArgs = b.method_getNumberOfArguments(cur)
    , r = b.method_copyReturnType(cur)
    , rtn = r.getCString()
  ffi.free(r)
  assert.equal(typeof rtn, 'string')
  assert.ok(numArgs >= 2)
  //console.error('  '+name)
  //console.error('    Returns: %s', rtn)
  // the first two args are always the id and the SEL
  for (var j=2; j<numArgs; j++) {
    var a = b.method_copyArgumentType(cur, j)
      , s = a.getCString()
    ffi.free(a)
    assert.equal(typeof s, 'string')
    assert.ok(s.length > 0)
    //console.error('      Arg %d: %s', j-2, s)
  }

  // advance the cursor
  p = p.seek(ffi.Bindings.TYPE_SIZE_MAP.pointer)
}
ffi.free(methods)


// Walk the inheritance chain
var superclass = c
  , i = 0
//console.error('\nWalking inheritance chain:')
//console.error('  %s', b.class_getName(superclass))
do {
  //process.stderr.write('  ')
  i++
  superclass = b.class_getSuperclass(superclass)
  //for (var j=0; j<i; j++) {
  //  process.stderr.write('  ')
  //}
  var name = b.class_getName(superclass)
  assert.equal(typeof name, 'string')
  assert.ok(name.length > 0)
  //console.error('↳ %s', name)
  
} while(!superclass.isNull())
assert.ok(i > 0)