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ExpressionSpec.swift
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//
// ExpressionSpec.swift
// ReactKitCalculator
//
// Created by Yasuhiro Inami on 2015/02/18.
// Copyright (c) 2015年 Yasuhiro Inami. All rights reserved.
//
import ReactKitCalculator
import ReactKit
import Quick
import Nimble
class ExpressionSpec: QuickSpec
{
override func spec()
{
typealias Key = Calculator.Key
var p: _Peripheral!
var calculator: Calculator!
beforeEach {
p = _Peripheral()
calculator = Calculator { mapper in
let stream = KVO.stream(p, "input")
|> map { $0 as? String } // asStream(String?)
for key in Calculator.Key.allKeys() {
mapper[key] = stream
|> filter { $0 == key.rawValue }
|> map { _ -> Void in } // asStream(Void)
}
}
#if true
// REACT (debug print)
calculator.inputStream ~> { key in
println()
println("***************************")
println("pressed key = `\(key.rawValue)`")
}
// REACT (debug print)
calculator.outputStream ~> { output in
let output = output ?? "(nil)";
println("output = `\(output)`")
println()
}
// REACT (debug print)
calculator.expressionStream ~> { expression in
let expression = expression ?? "(nil)";
println("expression = `\(expression)`")
println()
}
#endif
// REACT (set after debug print)
(p, "expression") <~ calculator.expressionStream
}
describe("accumulate digits") {
context("digits") {
it("`1 2 3` should print `123`") {
p.input = "1"
expect(p.expression!).to(equal("1 "))
p.input = "2"
expect(p.expression!).to(equal("12 "))
p.input = "3"
expect(p.expression!).to(equal("123 "))
}
}
context("decimal point") {
it("`1 . 2 3` should print `1.23`") {
p.input = "1"
expect(p.expression!).to(equal("1 "))
p.input = "."
expect(p.expression!).to(equal("1 ")) // NOTE: outputStream sends "1."
p.input = "2"
expect(p.expression!).to(equal("1.2 "))
p.input = "3"
expect(p.expression!).to(equal("1.23 "))
}
it("`. 2 3` should print `0.23`") {
p.input = "."
expect(p.expression).to(equal("0 ")) // NOTE: outputStream sends "0."
p.input = "2"
expect(p.expression!).to(equal("0.2 "))
p.input = "3"
expect(p.expression!).to(equal("0.23 "))
}
}
}
describe(".Equal") {
it("`= =` should print `0 = ` then `0 = `") {
p.input = "="
expect(p.expression!).to(equal("0 = "))
p.input = "="
expect(p.expression!).to(equal("0 = "))
}
it("`1 = =` should print `1 = ` then `1 = `") {
p.input = "1"
expect(p.expression!).to(equal("1 "))
p.input = "="
expect(p.expression!).to(equal("1 = "))
p.input = "="
expect(p.expression!).to(equal("1 = "))
}
}
describe(".Clear") {
it("`2 + C = =`") {
p.input = "2"
expect(p.expression!).to(equal("2 "))
p.input = "+"
expect(p.expression!).to(equal("2 + "))
p.input = "C"
expect(p.expression!).to(equal("2 + 0 ")) // 0 is set
p.input = "="
expect(p.expression!).to(equal("2 + 0 = "))
p.input = "="
expect(p.expression!).to(equal("2 + 0 = "))
}
it("`2 + 3 C = =`") {
p.input = "2"
expect(p.expression!).to(equal("2 "))
p.input = "+"
expect(p.expression!).to(equal("2 + "))
p.input = "3"
expect(p.expression!).to(equal("2 + 3 "))
p.input = "C"
expect(p.expression!).to(equal("2 + 0 ")) // clear current only
p.input = "="
expect(p.expression!).to(equal("2 + 0 = "))
p.input = "="
expect(p.expression!).to(equal("2 + 0 = "))
}
it("`2 + 3 C 4 = =`") {
p.input = "2"
expect(p.expression!).to(equal("2 "))
p.input = "+"
expect(p.expression!).to(equal("2 + "))
p.input = "3"
expect(p.expression!).to(equal("2 + 3 "))
p.input = "C"
expect(p.expression!).to(equal("2 + 0 ")) // clear current only
p.input = "4"
expect(p.expression!).to(equal("2 + 4 "))
p.input = "="
expect(p.expression!).to(equal("2 + 4 = "))
p.input = "="
expect(p.expression!).to(equal("6 + 4 = "))
}
it("`2 + 3 = C = =`") {
p.input = "2"
expect(p.expression!).to(equal("2 "))
p.input = "+"
expect(p.expression!).to(equal("2 + "))
p.input = "3"
expect(p.expression!).to(equal("2 + 3 "))
p.input = "="
expect(p.expression!).to(equal("2 + 3 = ")) // last operation: +3
p.input = "C"
expect(p.expression!).to(equal("0 "))
p.input = "="
expect(p.expression!).to(equal("0 + 3 = "))
p.input = "="
expect(p.expression!).to(equal("3 + 3 = "))
}
}
}
}