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import do_setup from require 'spec.test_setup'
import Constant, RTNode, Scope, SimpleRegistry, T, Array from require 'alv'
import Op, Builtin from require 'alv.base'
class TestOp extends Op
new: (...) => super ...
class TestBuiltin extends Builtin
new: (...) =>
setup do_setup
describe 'Constant', ->
it 'requires a value', ->
assert.has.error -> Constant.num!
assert.has.error -> Constant T.num
assert.has.no.error -> Constant T.bool, false
it 'stringifies well', ->
assert.is.equal "<num= 4>", tostring Constant.num 4
assert.is.equal "<bool= true>", tostring Constant.bool true
assert.is.equal "<bool= false>", tostring Constant.bool false
describe '.wrap', ->
it 'wraps numbers', ->
got = Constant.wrap 3
assert.is.equal T.num, got.type
assert.is.equal 3, got.value
it 'wraps strings', ->
got = Constant.wrap "im a happy string"
assert.is.equal T.str, got.type
assert.is.equal "im a happy string", got.value
it 'wraps Constants', ->
pi = Constant.num 3.14
got = Constant.wrap pi
assert.is.equal pi, got
it 'wraps Opdefs', ->
got = Constant.wrap TestOp
assert.is.equal T.opdef, got.type
assert.is.equal TestOp, got.value
it 'wraps Bultins', ->
got = Constant.wrap TestBuiltin
assert.is.equal T.builtin, got.type
assert.is.equal TestBuiltin, got.value
it 'wraps Scopes', ->
sub = Scope!
got = Constant.wrap sub
assert.is.equal T.scope, got.type
assert.is.equal sub, got.value
it 'wraps tables', ->
pi = Constant.num 3.14
got = Constant.wrap { :pi }
assert.is.equal T.scope, got.type
assert.is.equal pi, (got.value\get 'pi')\const!
describe ':unwrap', ->
it 'returns the raw value!', ->
assert.is.equal 3.14, (Constant.num 3.14)\unwrap!
assert.is.equal 'hi', (Constant.str 'hi')\unwrap!
assert.is.equal 'hi', (Constant.sym 'hi')\unwrap!
test 'can assert the type', ->
assert.is.equal 3.14, (Constant.num 3.14)\unwrap T.num
assert.is.equal 'hi', (Constant.str 'hi')\unwrap T.str
assert.is.equal 'hi', (Constant.sym 'hi')\unwrap T.sym
assert.has_error -> (Constant.num 3.14)\unwrap T.sym
assert.has_error -> (Constant.str 'hi')\unwrap T.num
assert.has_error -> (Constant.sym 'hi')\unwrap T.str
test 'has __call shorthand', ->
assert.is.equal 3.14, (Constant.num 3.14)!
assert.is.equal 'hi', (Constant.str 'hi')!
assert.is.equal 'hi', (Constant.sym 'hi')!
assert.is.equal 3.14, (Constant.num 3.14) T.num
assert.is.equal 'hi', (Constant.str 'hi') T.str
assert.is.equal 'hi', (Constant.sym 'hi') T.sym
assert.has_error -> (Constant.num 3.14) T.sym
assert.has_error -> (Constant.str 'hi') T.num
assert.has_error -> (Constant.sym 'hi') T.str
describe 'overrides __eq', ->
it 'compares the type', ->
val = Constant.num 3
assert.is.equal (Constant.num 3), val
assert.not.equal (Constant.str '3'), val
val = Constant.str 'hello'
assert.is.equal (Constant.str 'hello'), val
assert.not.equal (Constant.sym 'hello'), val
it 'compares the value', ->
val = Constant.num 3
assert.is.equal (Constant.num 3), val
assert.not.equal (Constant.num 4), val
it 'compares complex values', ->
ta = Array 3, T.num
tb = Array 3, T.num
a = Constant ta, { 1, 2, 3 }
b = Constant ta, { 1, 2, 3 }
c = Constant tb, { 1, 2, 3 }
d = Constant ta, { 1, 2, 4 }
assert.is.equal a, a
assert.is.equal b, a
assert.is.equal c, a
assert.not.equal d, a
it ':dirty is always false', ->
val = Constant.num 3
assert.is.false val\dirty!
val.value = 4
assert.is.false val\dirty!
describe ':eval', ->
it 'turns numbers into consts', ->
assert_noop = (val) ->
assert.is.equal val, val\eval!\const!
assert_noop Constant.num 2
assert_noop Constant.str 'hello'
it 'looks up symbols in the scope', ->
scope = with Scope!
\set 'number', RTNode result: Constant.num 3
\set 'hello', RTNode result: Constant.str "world"
\set 'goodbye', RTNode result: Constant.sym "again"
assert_eval = (sym, val) ->
const = Constant.sym sym
assert.is.equal val, (const\eval scope)\const!
assert_eval 'number', Constant.num 3
assert_eval 'hello', Constant.str "world"
assert_eval 'goodbye', Constant.sym "again"
it ':clones literals as themselves', ->
assert_noop = (val) -> assert.is.equal val, val\clone!
assert_noop Constant.num 2
assert_noop Constant.str 'hello'
assert_noop Constant.sym 'world'
describe ':fork', ->
it 'is equal to the original', ->
a = Constant.num 2
b = Constant.str 'asdf'
c = Constant T.weird, {}, '(raw)'
aa, bb, cc = a\fork!, b\fork!, c\fork!
assert.is.equal a, aa
assert.is.equal b, bb
assert.is.equal c, cc
assert.is.false aa\dirty!
assert.is.false bb\dirty!
assert.is.false cc\dirty!
assert.is.equal c.raw, cc.raw
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