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Add unit tests covering Data.init<T>(buffer: Unsafe{Mutable}BufferPointer<T>) #22528

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Merged
merged 1 commit into from
Feb 12, 2019
Merged

Add unit tests covering Data.init<T>(buffer: Unsafe{Mutable}BufferPointer<T>) #22528

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64 changes: 64 additions & 0 deletions test/stdlib/TestData.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -238,6 +238,68 @@ class TestData : TestDataSuper {
let data3 = Data(bytes: [1, 2, 3, 4, 5][1..<3])
expectEqual(2, data3.count)
}

func testInitializationWithBufferPointer() {
let nilBuffer = UnsafeBufferPointer<UInt8>(start: nil, count: 0)
let data = Data(buffer: nilBuffer)
expectEqual(data, Data())

let validPointer = UnsafeMutablePointer<UInt8>.allocate(capacity: 2)
validPointer[0] = 0xCA
validPointer[1] = 0xFE
defer { validPointer.deallocate() }

let emptyBuffer = UnsafeBufferPointer<UInt8>(start: validPointer, count: 0)
let data2 = Data(buffer: emptyBuffer)
expectEqual(data2, Data())

let shortBuffer = UnsafeBufferPointer<UInt8>(start: validPointer, count: 1)
let data3 = Data(buffer: shortBuffer)
expectEqual(data3, Data([0xCA]))

let fullBuffer = UnsafeBufferPointer<UInt8>(start: validPointer, count: 2)
let data4 = Data(buffer: fullBuffer)
expectEqual(data4, Data([0xCA, 0xFE]))

let tuple: (UInt16, UInt16, UInt16, UInt16) = (0xFF, 0xFE, 0xFD, 0xFC)
withUnsafeBytes(of: tuple) {
// If necessary, port this to big-endian.
let tupleBuffer: UnsafeBufferPointer<UInt8> = $0.bindMemory(to: UInt8.self)
let data5 = Data(buffer: tupleBuffer)
expectEqual(data5, Data([0xFF, 0x00, 0xFE, 0x00, 0xFD, 0x00, 0xFC, 0x00]))
}
}

func testInitializationWithMutableBufferPointer() {
let nilBuffer = UnsafeMutableBufferPointer<UInt8>(start: nil, count: 0)
let data = Data(buffer: nilBuffer)
expectEqual(data, Data())

let validPointer = UnsafeMutablePointer<UInt8>.allocate(capacity: 2)
validPointer[0] = 0xCA
validPointer[1] = 0xFE
defer { validPointer.deallocate() }

let emptyBuffer = UnsafeMutableBufferPointer<UInt8>(start: validPointer, count: 0)
let data2 = Data(buffer: emptyBuffer)
expectEqual(data2, Data())

let shortBuffer = UnsafeMutableBufferPointer<UInt8>(start: validPointer, count: 1)
let data3 = Data(buffer: shortBuffer)
expectEqual(data3, Data([0xCA]))

let fullBuffer = UnsafeMutableBufferPointer<UInt8>(start: validPointer, count: 2)
let data4 = Data(buffer: fullBuffer)
expectEqual(data4, Data([0xCA, 0xFE]))

var tuple: (UInt16, UInt16, UInt16, UInt16) = (0xFF, 0xFE, 0xFD, 0xFC)
withUnsafeMutableBytes(of: &tuple) {
// If necessary, port this to big-endian.
let tupleBuffer: UnsafeMutableBufferPointer<UInt8> = $0.bindMemory(to: UInt8.self)
let data5 = Data(buffer: tupleBuffer)
expectEqual(data5, Data([0xFF, 0x00, 0xFE, 0x00, 0xFD, 0x00, 0xFC, 0x00]))
}
}

func testMutableData() {
let hello = dataFrom("hello")
Expand Down Expand Up @@ -3742,6 +3804,8 @@ class TestData : TestDataSuper {
var DataTests = TestSuite("TestData")
DataTests.test("testBasicConstruction") { TestData().testBasicConstruction() }
DataTests.test("testInitializationWithArray") { TestData().testInitializationWithArray() }
DataTests.test("testInitializationWithBufferPointer") { TestData().testInitializationWithBufferPointer() }
DataTests.test("testInitializationWithMutableBufferPointer") { TestData().testInitializationWithMutableBufferPointer() }
DataTests.test("testMutableData") { TestData().testMutableData() }
DataTests.test("testCustomData") { TestData().testCustomData() }
DataTests.test("testBridgingDefault") { TestData().testBridgingDefault() }
Expand Down