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|
import Cell, RootCell from require 'core.cell'
import ValueStream, Scope, Tag, SimpleRegistry, globals from require 'core'
import Logger from require 'logger'
Logger.init 'silent'
hello_world = Cell.parse (Tag.parse '2'), { '', (ValueStream.sym 'hello'), ' ', (ValueStream.str 'world'), '' }
two_plus_two = Cell.parse (Tag.parse '3'), { '', (ValueStream.sym '+'), ' ', (ValueStream.num 2), ' ', (ValueStream.num 2), '' }
reg = SimpleRegistry!
setup -> reg\grab!
teardown -> reg\release!
describe 'Cell', ->
describe 'when quoted', ->
with hello_world\quote!
it 'stays equal', ->
assert.is.equal Cell, .__class
assert.is.equal (ValueStream.sym 'hello'), \head!
assert.is.same { ValueStream.str 'world' }, \tail!
it 'shares the tag', ->
assert.is.equal hello_world.tag, .tag
with two_plus_two\quote!
it 'stays equal', ->
assert.is.equal Cell, .__class
assert.is.equal (ValueStream.sym '+'), \head!
assert.is.same { (ValueStream.num 2), (ValueStream.num 2) }, \tail!
it 'shares the tag', ->
assert.is.equal two_plus_two.tag, .tag
describe 'when cloned', ->
parent = Tag.blank '1'
with hello_world\clone parent
it 'keeps children', ->
assert.is.equal Cell, .__class
assert.is.equal (ValueStream.sym 'hello'), \head!
assert.is.same { ValueStream.str 'world' }, \tail!
it 'clones the tag', ->
assert.is.equal hello_world.tag, .tag.original
assert.is.equal parent, .tag.parent
describe 'when evaluated', ->
it 'errors when empty', ->
cell = Cell.parse {''}
assert.has.error -> cell\eval globals
it 'evaluates its head', ->
head = ValueStream.sym 'trace'
cell = Cell.parse { '', head, ' ', (ValueStream.sym 'true'), '' }
s = spy.on head, 'eval'
cell\eval globals
assert.spy(s).was_called_with (match.is_ref head), (match.is_ref globals)
describe 'RootCell', ->
test 'tag is always [0]', ->
cell = Cell.parse_root {}
assert.is.equal '[0]', cell.tag\stringify!
test 'head is always "do"', ->
cell = Cell.parse_root {}
assert.is.equal (ValueStream.sym 'do'), cell\head!
cell = RootCell nil, { hello_world, two_plus_two }
assert.is.equal (ValueStream.sym 'do'), cell\head!
test 'tail is all children', ->
cell = Cell.parse_root {}
assert.is.same {}, cell\tail!
cell = RootCell nil, { hello_world, two_plus_two }
assert.is.same { hello_world, two_plus_two },
cell\tail!
|
