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|
import Pattern, match from require 'core.pattern'
import Result, Value from require 'core'
-- wrap in non-const result
wrap = (value) ->
with Result :value
.side_inputs = { 'fake' }
-- wrap in const result
wrap_const = (value) -> Result :value
describe 'Type Pattern', ->
num = wrap Value.num 1
str = wrap Value.str 'hello'
special = wrap Value 'midi/sysex-message'
c_num = wrap_const Value.num 1
c_str = wrap_const Value.str 'hello'
describe 'simple types', ->
it 'matches self type', ->
pat = Pattern 'num'
assert.is.true pat\matches num
assert.is.true pat\matches c_num
assert.is.false pat\matches str
assert.is.false pat\matches c_str
assert.is.false pat\matches nil
it 'can contain special symbols', ->
pat = Pattern 'midi/sysex-message'
assert.is.true pat\matches special
assert.is.false pat\matches num
assert.is.false pat\matches str
assert.is.false pat\matches nil
it 'can match \'any\' type', ->
pat = Pattern 'any'
assert.is.true pat\matches num
assert.is.true pat\matches str
assert.is.true pat\matches special
assert.is.true pat\matches c_num
assert.is.true pat\matches c_str
assert.is.false pat\matches nil
it 'checks const-ness', ->
pat = Pattern '=any'
assert.is.true pat.const
assert.is.true pat\matches c_num
assert.is.true pat\matches c_str
assert.is.false pat\matches num
assert.is.false pat\matches str
assert.is.false pat\matches nil
pat = Pattern '=num'
assert.is.true pat.const
assert.is.true pat\matches c_num
assert.is.false pat\matches c_str
assert.is.false pat\matches num
assert.is.false pat\matches str
assert.is.false pat\matches nil
describe 'can capture', ->
it 'matches', ->
pat = Pattern 'str'
stream = {str, num}
assert.is.equal str, pat\match stream
assert.is.same {num}, stream
it 'errors if not given', ->
pat = Pattern 'str'
stream = {}
assert.has.error -> pat\match stream
stream = {num, str}
assert.has.error -> pat\match stream
assert.is.same {num, str}, stream
describe 'optional types', ->
pat = Pattern 'num?'
it 'at the end', ->
stream = {}
assert.is.false, pat\match stream
it 'in the middle', ->
stream = {str}
assert.is.false, pat\match stream
describe 'splats', ->
pat = Pattern '*num'
it 'parses', ->
assert.is.true pat.splat
assert.is.equal 'num', pat.type
it 'at the end', ->
stream = {}
assert.has.error -> pat\match stream
assert.is.same {}, stream
stream = {num}
assert.is.same {num}, pat\match stream
assert.is.same {}, stream
stream = {num, num}
assert.is.same {num, num}, pat\match stream
assert.is.same {}, stream
it 'in the middle', ->
stream = {str}
assert.has.error -> pat\match stream
assert.is.same {str}, stream
stream = {num, str}
assert.is.same {num}, pat\match stream
assert.is.same {str}, stream
stream = {num, num, str}
assert.is.same {num, num}, pat\match stream
assert.is.same {str}, stream
describe 'optional splats', ->
pat = Pattern '*num?'
it 'parses', ->
assert.is.true pat.splat
assert.is.true pat.opt
assert.is.equal 'num', pat.type
it 'at the end', ->
stream = {}
assert.is.same {}, pat\match stream
assert.is.same {}, stream
stream = {num}
assert.is.same {num}, pat\match stream
assert.is.same {}, stream
stream = {num, num}
assert.is.same {num, num}, pat\match stream
assert.is.same {}, stream
it 'in the middle', ->
stream = {str}
assert.is.same {}, pat\match stream
assert.is.same {str}, stream
stream = {num, str}
assert.is.same {num}, pat\match stream
assert.is.same {str}, stream
stream = {num, num, str}
assert.is.same {num, num}, pat\match stream
assert.is.same {str}, stream
describe 'match', ->
num = wrap Value.num 1
str = wrap Value.str 'hello'
c_num = wrap_const Value.num 1
c_str = wrap_const Value.str 'hello'
it 'matches lists', ->
assert.is.same {num, num, str}, match 'num num str', {num, num, str}
assert.is.same {num, str}, match 'num str', {num, str}
assert.is.same {c_num, str}, match '=num str', {c_num, str}
it 'throws type errors', ->
assert.has.error -> match 'str num str', {num, num, str}
assert.has.error -> match 'num str num', {num, str}
assert.has.error -> match '=num str', {num, str}
it 'throws extra arg errors', ->
assert.has.error -> match 'num str', {num, str, str}
assert.has.error -> match {}, {num}
assert.has.error -> match '*num', {num, num, str}
it 'matches optional arguments', ->
assert.is.same {str, num, str}, match 'str num? str', {str, num, str}
assert.is.same {str, nil, str}, match 'str num? str', {str, str}
assert.is.same {str, nil}, match 'str num?', {str}
it 'matches splats', ->
assert.is.same {{c_str, str, str}, num}, match '*str num', {c_str, str, str, num}
assert.is.same {c_str, {str, str}}, match 'any? *str', {c_str, str, str}
assert.has.error -> match '*str num', {num}
assert.has.error -> match 'any? *str', {str}
it 'matches optional splats', ->
assert.is.same {{c_str, str, str}, num}, match '*str? num', {c_str, str, str, num}
assert.is.same {c_str, {str, str}}, match 'any? *str?', {c_str, str, str}
assert.is.same {{}, num}, match '*str? num', {num}
assert.is.same {str, {}}, match 'any? *str?', {str}
|
