Concatenate.swift

//===--- Concatenate.swift - Tests for lazy/eager concatenate -------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
// RUN: %target-run-simple-swift
// REQUIRES: executable_test

import StdlibUnittest

var ConcatenateTests = TestSuite("ConcatenateTests")

// Help the type checker (<rdar://problem/17897413> Slow type deduction)
typealias X = (Range<Int>, ContiguousArray<Range<Int>>)

let samples: ContiguousArray<X> = [
  (0..<8, [ 1..<1, 0..<5, 7..<7, 5..<7, 7..<8 ] as ContiguousArray<Range<Int>>),
  (0..<8, [ 0..<5, 7..<7, 5..<7, 7..<8 ] as ContiguousArray<Range<Int>>),
  (0..<8, [ 1..<1, 0..<5, 7..<7, 5..<7, 7..<8, 11..<11 ] as ContiguousArray<Range<Int>>),
  (0..<8, [ 0..<5, 7..<7, 5..<7, 7..<8, 11..<11 ] as ContiguousArray<Range<Int>>),
  (0..<0, [ 11..<11 ] as ContiguousArray<Range<Int>>),
  (0..<0, [ 3..<3, 11..<11 ] as ContiguousArray<Range<Int>>),
  (0..<0, [] as ContiguousArray<Range<Int>>),
]

let expected = ContiguousArray(0..<8)

for (expected, source) in samples {
  ConcatenateTests.test("forward-\(source)") {
    checkBidirectionalCollection(
      expected,
      _lazyConcatenate(source),
      SourceLocStack().withCurrentLoc())
  }

  ConcatenateTests.test("reverse-\(source)") {
    // FIXME: separate 'expected' and 'reversed' variables are a workaround
    // for: <rdar://problem/20789500>
    let expected = ContiguousArray(lazy(expected).reverse())
    let reversed = _lazyConcatenate(source).reverse()
    checkBidirectionalCollection(
      expected,
      reversed,
      SourceLocStack().withCurrentLoc())
  }

  ConcatenateTests.test("sequence-\(source)") {
    checkSequence(
      ContiguousArray(expected),
      _lazyConcatenate(AnySequence(source)),
      SourceLocStack().withCurrentLoc())
  }
}

runAllTests()