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[Base64] Add new encoding options #1195

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75 changes: 71 additions & 4 deletions Sources/FoundationEssentials/Data/Data+Base64.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -146,6 +146,64 @@ extension Base64 {
UInt8(ascii: "6"), UInt8(ascii: "7"), UInt8(ascii: "8"), UInt8(ascii: "9"), UInt8(ascii: "+"), UInt8(ascii: "/"),
]

static let encoding0url: [UInt8] = [
UInt8(ascii: "A"), UInt8(ascii: "A"), UInt8(ascii: "A"), UInt8(ascii: "A"), UInt8(ascii: "B"), UInt8(ascii: "B"), UInt8(ascii: "B"), UInt8(ascii: "B"), UInt8(ascii: "C"), UInt8(ascii: "C"),
UInt8(ascii: "C"), UInt8(ascii: "C"), UInt8(ascii: "D"), UInt8(ascii: "D"), UInt8(ascii: "D"), UInt8(ascii: "D"), UInt8(ascii: "E"), UInt8(ascii: "E"), UInt8(ascii: "E"), UInt8(ascii: "E"),
UInt8(ascii: "F"), UInt8(ascii: "F"), UInt8(ascii: "F"), UInt8(ascii: "F"), UInt8(ascii: "G"), UInt8(ascii: "G"), UInt8(ascii: "G"), UInt8(ascii: "G"), UInt8(ascii: "H"), UInt8(ascii: "H"),
UInt8(ascii: "H"), UInt8(ascii: "H"), UInt8(ascii: "I"), UInt8(ascii: "I"), UInt8(ascii: "I"), UInt8(ascii: "I"), UInt8(ascii: "J"), UInt8(ascii: "J"), UInt8(ascii: "J"), UInt8(ascii: "J"),
UInt8(ascii: "K"), UInt8(ascii: "K"), UInt8(ascii: "K"), UInt8(ascii: "K"), UInt8(ascii: "L"), UInt8(ascii: "L"), UInt8(ascii: "L"), UInt8(ascii: "L"), UInt8(ascii: "M"), UInt8(ascii: "M"),
UInt8(ascii: "M"), UInt8(ascii: "M"), UInt8(ascii: "N"), UInt8(ascii: "N"), UInt8(ascii: "N"), UInt8(ascii: "N"), UInt8(ascii: "O"), UInt8(ascii: "O"), UInt8(ascii: "O"), UInt8(ascii: "O"),
UInt8(ascii: "P"), UInt8(ascii: "P"), UInt8(ascii: "P"), UInt8(ascii: "P"), UInt8(ascii: "Q"), UInt8(ascii: "Q"), UInt8(ascii: "Q"), UInt8(ascii: "Q"), UInt8(ascii: "R"), UInt8(ascii: "R"),
UInt8(ascii: "R"), UInt8(ascii: "R"), UInt8(ascii: "S"), UInt8(ascii: "S"), UInt8(ascii: "S"), UInt8(ascii: "S"), UInt8(ascii: "T"), UInt8(ascii: "T"), UInt8(ascii: "T"), UInt8(ascii: "T"),
UInt8(ascii: "U"), UInt8(ascii: "U"), UInt8(ascii: "U"), UInt8(ascii: "U"), UInt8(ascii: "V"), UInt8(ascii: "V"), UInt8(ascii: "V"), UInt8(ascii: "V"), UInt8(ascii: "W"), UInt8(ascii: "W"),
UInt8(ascii: "W"), UInt8(ascii: "W"), UInt8(ascii: "X"), UInt8(ascii: "X"), UInt8(ascii: "X"), UInt8(ascii: "X"), UInt8(ascii: "Y"), UInt8(ascii: "Y"), UInt8(ascii: "Y"), UInt8(ascii: "Y"),
UInt8(ascii: "Z"), UInt8(ascii: "Z"), UInt8(ascii: "Z"), UInt8(ascii: "Z"), UInt8(ascii: "a"), UInt8(ascii: "a"), UInt8(ascii: "a"), UInt8(ascii: "a"), UInt8(ascii: "b"), UInt8(ascii: "b"),
UInt8(ascii: "b"), UInt8(ascii: "b"), UInt8(ascii: "c"), UInt8(ascii: "c"), UInt8(ascii: "c"), UInt8(ascii: "c"), UInt8(ascii: "d"), UInt8(ascii: "d"), UInt8(ascii: "d"), UInt8(ascii: "d"),
UInt8(ascii: "e"), UInt8(ascii: "e"), UInt8(ascii: "e"), UInt8(ascii: "e"), UInt8(ascii: "f"), UInt8(ascii: "f"), UInt8(ascii: "f"), UInt8(ascii: "f"), UInt8(ascii: "g"), UInt8(ascii: "g"),
UInt8(ascii: "g"), UInt8(ascii: "g"), UInt8(ascii: "h"), UInt8(ascii: "h"), UInt8(ascii: "h"), UInt8(ascii: "h"), UInt8(ascii: "i"), UInt8(ascii: "i"), UInt8(ascii: "i"), UInt8(ascii: "i"),
UInt8(ascii: "j"), UInt8(ascii: "j"), UInt8(ascii: "j"), UInt8(ascii: "j"), UInt8(ascii: "k"), UInt8(ascii: "k"), UInt8(ascii: "k"), UInt8(ascii: "k"), UInt8(ascii: "l"), UInt8(ascii: "l"),
UInt8(ascii: "l"), UInt8(ascii: "l"), UInt8(ascii: "m"), UInt8(ascii: "m"), UInt8(ascii: "m"), UInt8(ascii: "m"), UInt8(ascii: "n"), UInt8(ascii: "n"), UInt8(ascii: "n"), UInt8(ascii: "n"),
UInt8(ascii: "o"), UInt8(ascii: "o"), UInt8(ascii: "o"), UInt8(ascii: "o"), UInt8(ascii: "p"), UInt8(ascii: "p"), UInt8(ascii: "p"), UInt8(ascii: "p"), UInt8(ascii: "q"), UInt8(ascii: "q"),
UInt8(ascii: "q"), UInt8(ascii: "q"), UInt8(ascii: "r"), UInt8(ascii: "r"), UInt8(ascii: "r"), UInt8(ascii: "r"), UInt8(ascii: "s"), UInt8(ascii: "s"), UInt8(ascii: "s"), UInt8(ascii: "s"),
UInt8(ascii: "t"), UInt8(ascii: "t"), UInt8(ascii: "t"), UInt8(ascii: "t"), UInt8(ascii: "u"), UInt8(ascii: "u"), UInt8(ascii: "u"), UInt8(ascii: "u"), UInt8(ascii: "v"), UInt8(ascii: "v"),
UInt8(ascii: "v"), UInt8(ascii: "v"), UInt8(ascii: "w"), UInt8(ascii: "w"), UInt8(ascii: "w"), UInt8(ascii: "w"), UInt8(ascii: "x"), UInt8(ascii: "x"), UInt8(ascii: "x"), UInt8(ascii: "x"),
UInt8(ascii: "y"), UInt8(ascii: "y"), UInt8(ascii: "y"), UInt8(ascii: "y"), UInt8(ascii: "z"), UInt8(ascii: "z"), UInt8(ascii: "z"), UInt8(ascii: "z"), UInt8(ascii: "0"), UInt8(ascii: "0"),
UInt8(ascii: "0"), UInt8(ascii: "0"), UInt8(ascii: "1"), UInt8(ascii: "1"), UInt8(ascii: "1"), UInt8(ascii: "1"), UInt8(ascii: "2"), UInt8(ascii: "2"), UInt8(ascii: "2"), UInt8(ascii: "2"),
UInt8(ascii: "3"), UInt8(ascii: "3"), UInt8(ascii: "3"), UInt8(ascii: "3"), UInt8(ascii: "4"), UInt8(ascii: "4"), UInt8(ascii: "4"), UInt8(ascii: "4"), UInt8(ascii: "5"), UInt8(ascii: "5"),
UInt8(ascii: "5"), UInt8(ascii: "5"), UInt8(ascii: "6"), UInt8(ascii: "6"), UInt8(ascii: "6"), UInt8(ascii: "6"), UInt8(ascii: "7"), UInt8(ascii: "7"), UInt8(ascii: "7"), UInt8(ascii: "7"),
UInt8(ascii: "8"), UInt8(ascii: "8"), UInt8(ascii: "8"), UInt8(ascii: "8"), UInt8(ascii: "9"), UInt8(ascii: "9"), UInt8(ascii: "9"), UInt8(ascii: "9"), UInt8(ascii: "-"), UInt8(ascii: "-"),
UInt8(ascii: "-"), UInt8(ascii: "-"), UInt8(ascii: "_"), UInt8(ascii: "_"), UInt8(ascii: "_"), UInt8(ascii: "_"),
]

static let encoding1url: [UInt8] = [
UInt8(ascii: "A"), UInt8(ascii: "B"), UInt8(ascii: "C"), UInt8(ascii: "D"), UInt8(ascii: "E"), UInt8(ascii: "F"), UInt8(ascii: "G"), UInt8(ascii: "H"), UInt8(ascii: "I"), UInt8(ascii: "J"),
UInt8(ascii: "K"), UInt8(ascii: "L"), UInt8(ascii: "M"), UInt8(ascii: "N"), UInt8(ascii: "O"), UInt8(ascii: "P"), UInt8(ascii: "Q"), UInt8(ascii: "R"), UInt8(ascii: "S"), UInt8(ascii: "T"),
UInt8(ascii: "U"), UInt8(ascii: "V"), UInt8(ascii: "W"), UInt8(ascii: "X"), UInt8(ascii: "Y"), UInt8(ascii: "Z"), UInt8(ascii: "a"), UInt8(ascii: "b"), UInt8(ascii: "c"), UInt8(ascii: "d"),
UInt8(ascii: "e"), UInt8(ascii: "f"), UInt8(ascii: "g"), UInt8(ascii: "h"), UInt8(ascii: "i"), UInt8(ascii: "j"), UInt8(ascii: "k"), UInt8(ascii: "l"), UInt8(ascii: "m"), UInt8(ascii: "n"),
UInt8(ascii: "o"), UInt8(ascii: "p"), UInt8(ascii: "q"), UInt8(ascii: "r"), UInt8(ascii: "s"), UInt8(ascii: "t"), UInt8(ascii: "u"), UInt8(ascii: "v"), UInt8(ascii: "w"), UInt8(ascii: "x"),
UInt8(ascii: "y"), UInt8(ascii: "z"), UInt8(ascii: "0"), UInt8(ascii: "1"), UInt8(ascii: "2"), UInt8(ascii: "3"), UInt8(ascii: "4"), UInt8(ascii: "5"), UInt8(ascii: "6"), UInt8(ascii: "7"),
UInt8(ascii: "8"), UInt8(ascii: "9"), UInt8(ascii: "-"), UInt8(ascii: "_"), UInt8(ascii: "A"), UInt8(ascii: "B"), UInt8(ascii: "C"), UInt8(ascii: "D"), UInt8(ascii: "E"), UInt8(ascii: "F"),
UInt8(ascii: "G"), UInt8(ascii: "H"), UInt8(ascii: "I"), UInt8(ascii: "J"), UInt8(ascii: "K"), UInt8(ascii: "L"), UInt8(ascii: "M"), UInt8(ascii: "N"), UInt8(ascii: "O"), UInt8(ascii: "P"),
UInt8(ascii: "Q"), UInt8(ascii: "R"), UInt8(ascii: "S"), UInt8(ascii: "T"), UInt8(ascii: "U"), UInt8(ascii: "V"), UInt8(ascii: "W"), UInt8(ascii: "X"), UInt8(ascii: "Y"), UInt8(ascii: "Z"),
UInt8(ascii: "a"), UInt8(ascii: "b"), UInt8(ascii: "c"), UInt8(ascii: "d"), UInt8(ascii: "e"), UInt8(ascii: "f"), UInt8(ascii: "g"), UInt8(ascii: "h"), UInt8(ascii: "i"), UInt8(ascii: "j"),
UInt8(ascii: "k"), UInt8(ascii: "l"), UInt8(ascii: "m"), UInt8(ascii: "n"), UInt8(ascii: "o"), UInt8(ascii: "p"), UInt8(ascii: "q"), UInt8(ascii: "r"), UInt8(ascii: "s"), UInt8(ascii: "t"),
UInt8(ascii: "u"), UInt8(ascii: "v"), UInt8(ascii: "w"), UInt8(ascii: "x"), UInt8(ascii: "y"), UInt8(ascii: "z"), UInt8(ascii: "0"), UInt8(ascii: "1"), UInt8(ascii: "2"), UInt8(ascii: "3"),
UInt8(ascii: "4"), UInt8(ascii: "5"), UInt8(ascii: "6"), UInt8(ascii: "7"), UInt8(ascii: "8"), UInt8(ascii: "9"), UInt8(ascii: "-"), UInt8(ascii: "_"), UInt8(ascii: "A"), UInt8(ascii: "B"),
UInt8(ascii: "C"), UInt8(ascii: "D"), UInt8(ascii: "E"), UInt8(ascii: "F"), UInt8(ascii: "G"), UInt8(ascii: "H"), UInt8(ascii: "I"), UInt8(ascii: "J"), UInt8(ascii: "K"), UInt8(ascii: "L"),
UInt8(ascii: "M"), UInt8(ascii: "N"), UInt8(ascii: "O"), UInt8(ascii: "P"), UInt8(ascii: "Q"), UInt8(ascii: "R"), UInt8(ascii: "S"), UInt8(ascii: "T"), UInt8(ascii: "U"), UInt8(ascii: "V"),
UInt8(ascii: "W"), UInt8(ascii: "X"), UInt8(ascii: "Y"), UInt8(ascii: "Z"), UInt8(ascii: "a"), UInt8(ascii: "b"), UInt8(ascii: "c"), UInt8(ascii: "d"), UInt8(ascii: "e"), UInt8(ascii: "f"),
UInt8(ascii: "g"), UInt8(ascii: "h"), UInt8(ascii: "i"), UInt8(ascii: "j"), UInt8(ascii: "k"), UInt8(ascii: "l"), UInt8(ascii: "m"), UInt8(ascii: "n"), UInt8(ascii: "o"), UInt8(ascii: "p"),
UInt8(ascii: "q"), UInt8(ascii: "r"), UInt8(ascii: "s"), UInt8(ascii: "t"), UInt8(ascii: "u"), UInt8(ascii: "v"), UInt8(ascii: "w"), UInt8(ascii: "x"), UInt8(ascii: "y"), UInt8(ascii: "z"),
UInt8(ascii: "0"), UInt8(ascii: "1"), UInt8(ascii: "2"), UInt8(ascii: "3"), UInt8(ascii: "4"), UInt8(ascii: "5"), UInt8(ascii: "6"), UInt8(ascii: "7"), UInt8(ascii: "8"), UInt8(ascii: "9"),
UInt8(ascii: "-"), UInt8(ascii: "_"), UInt8(ascii: "A"), UInt8(ascii: "B"), UInt8(ascii: "C"), UInt8(ascii: "D"), UInt8(ascii: "E"), UInt8(ascii: "F"), UInt8(ascii: "G"), UInt8(ascii: "H"),
UInt8(ascii: "I"), UInt8(ascii: "J"), UInt8(ascii: "K"), UInt8(ascii: "L"), UInt8(ascii: "M"), UInt8(ascii: "N"), UInt8(ascii: "O"), UInt8(ascii: "P"), UInt8(ascii: "Q"), UInt8(ascii: "R"),
UInt8(ascii: "S"), UInt8(ascii: "T"), UInt8(ascii: "U"), UInt8(ascii: "V"), UInt8(ascii: "W"), UInt8(ascii: "X"), UInt8(ascii: "Y"), UInt8(ascii: "Z"), UInt8(ascii: "a"), UInt8(ascii: "b"),
UInt8(ascii: "c"), UInt8(ascii: "d"), UInt8(ascii: "e"), UInt8(ascii: "f"), UInt8(ascii: "g"), UInt8(ascii: "h"), UInt8(ascii: "i"), UInt8(ascii: "j"), UInt8(ascii: "k"), UInt8(ascii: "l"),
UInt8(ascii: "m"), UInt8(ascii: "n"), UInt8(ascii: "o"), UInt8(ascii: "p"), UInt8(ascii: "q"), UInt8(ascii: "r"), UInt8(ascii: "s"), UInt8(ascii: "t"), UInt8(ascii: "u"), UInt8(ascii: "v"),
UInt8(ascii: "w"), UInt8(ascii: "x"), UInt8(ascii: "y"), UInt8(ascii: "z"), UInt8(ascii: "0"), UInt8(ascii: "1"), UInt8(ascii: "2"), UInt8(ascii: "3"), UInt8(ascii: "4"), UInt8(ascii: "5"),
UInt8(ascii: "6"), UInt8(ascii: "7"), UInt8(ascii: "8"), UInt8(ascii: "9"), UInt8(ascii: "-"), UInt8(ascii: "_"),
]

static func encodeToBytes<Buffer: Collection>(bytes: Buffer, options: Data.Base64EncodingOptions)
-> [UInt8] where Buffer.Element == UInt8
{
Expand Down Expand Up @@ -212,7 +270,7 @@ extension Base64 {
return self._encodeWithLineBreaks(input: input, buffer: buffer, length: &length, options: options)
}

let omitPaddingCharacter = false
let omitPaddingCharacter = options.contains(.omitPaddingCharacter)

Self.withUnsafeEncodingTablesAsBufferPointers(options: options) { (e0, e1) throws(Never) -> Void in
let to = input.count / 3 * 3
Expand Down Expand Up @@ -382,7 +440,16 @@ extension Base64 {
}

static func encodeComputeCapacity(bytes: Int, options: Data.Base64EncodingOptions) -> Int {
let capacityWithoutBreaks = ((bytes + 2) / 3) * 4
let capacityWithoutBreaks = if options.contains(.omitPaddingCharacter) {
switch bytes % 3 {
case 0: ((bytes + 2) / 3) * 4
case 1: ((bytes + 2) / 3) * 4 - 2
case 2: ((bytes + 2) / 3) * 4 - 1
default: fatalError()
}
} else {
((bytes + 2) / 3) * 4
}

guard options.contains(.lineLength64Characters) || options.contains(.lineLength76Characters) else {
return capacityWithoutBreaks
Expand All @@ -400,8 +467,8 @@ extension Base64 {
}

static func withUnsafeEncodingTablesAsBufferPointers<R>(options: Data.Base64EncodingOptions, _ body: (UnsafeBufferPointer<UInt8>, UnsafeBufferPointer<UInt8>) -> R) -> R {
let encoding0 = Self.encoding0
let encoding1 = Self.encoding1
let encoding0 = options.contains(.base64URLAlphabet) ? Self.encoding0url : Self.encoding0
let encoding1 = options.contains(.base64URLAlphabet) ? Self.encoding1url : Self.encoding1

assert(encoding0.count == 256)
assert(encoding1.count == 256)
Expand Down
8 changes: 8 additions & 0 deletions Sources/FoundationEssentials/Data/Data.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -2766,6 +2766,14 @@ extension Data {
public static let endLineWithCarriageReturn = Base64EncodingOptions(rawValue: 1 << 4)
/// When a maximum line length is set, specify that the line ending to insert should include a line feed.
public static let endLineWithLineFeed = Base64EncodingOptions(rawValue: 1 << 5)

/// Use the base64url alphabet to encode the data
@available(FoundationPreview 6.2, *)
public static let base64URLAlphabet = Base64EncodingOptions(rawValue: 1 << 6)

/// Omit the `=` padding characters in the end of the base64 encoded result
@available(FoundationPreview 6.2, *)
public static let omitPaddingCharacter = Base64EncodingOptions(rawValue: 1 << 7)
}

@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
Expand Down
48 changes: 48 additions & 0 deletions Tests/FoundationEssentialsTests/DataTests.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -1804,17 +1804,65 @@ extension DataTests {
XCTAssertEqual(Data().base64EncodedData(), Data())
}

func test_base64Encode_allBytesSequentially() {
let input = UInt8(0) ... UInt8(255)

XCTAssertEqual(
Data(input).base64EncodedString(),
"""
AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4OTo7PD0+P0B\
BQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fn+AgY\
KDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmqq6ytrq+wsbKztLW2t7i5uru8vb6/wMHCw\
8TFxsfIycrLzM3Oz9DR0tPU1dbX2Nna29zd3t/g4eLj5OXm5+jp6uvs7e7v8PHy8/T19vf4+fr7/P3+/w==
"""
)
XCTAssertEqual(
Data(input).base64EncodedString(options: .omitPaddingCharacter),
"""
AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4OTo7PD0+P0B\
BQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fn+AgY\
KDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmqq6ytrq+wsbKztLW2t7i5uru8vb6/wMHCw\
8TFxsfIycrLzM3Oz9DR0tPU1dbX2Nna29zd3t/g4eLj5OXm5+jp6uvs7e7v8PHy8/T19vf4+fr7/P3+/w
"""
)
XCTAssertEqual(
Data(input).base64EncodedString(options: [.base64URLAlphabet]),
"""
AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4OTo7PD0-P0B\
BQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fn-AgY\
KDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmqq6ytrq-wsbKztLW2t7i5uru8vb6_wMHCw\
8TFxsfIycrLzM3Oz9DR0tPU1dbX2Nna29zd3t_g4eLj5OXm5-jp6uvs7e7v8PHy8_T19vf4-fr7_P3-_w==
"""
)
XCTAssertEqual(
Data(input).base64EncodedString(options: [.omitPaddingCharacter, .base64URLAlphabet]),
"""
AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4OTo7PD0-P0B\
BQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fn-AgY\
KDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmqq6ytrq-wsbKztLW2t7i5uru8vb6_wMHCw\
8TFxsfIycrLzM3Oz9DR0tPU1dbX2Nna29zd3t_g4eLj5OXm5-jp6uvs7e7v8PHy8_T19vf4-fr7_P3-_w
"""
)
}

func test_base64Encode_arrayOfNulls() {
let input = Data(repeating: 0, count: 10)
XCTAssertEqual(input.base64EncodedString(), "AAAAAAAAAAAAAA==")
XCTAssertEqual(input.base64EncodedData(), Data("AAAAAAAAAAAAAA==".utf8))

XCTAssertEqual(input.base64EncodedString(options: .omitPaddingCharacter), "AAAAAAAAAAAAAA")
XCTAssertEqual(input.base64EncodedData(options: .omitPaddingCharacter), Data("AAAAAAAAAAAAAA".utf8))
}

func test_base64Encode_differentPaddingNeeds() {
XCTAssertEqual(Data([1, 2, 3, 4]).base64EncodedString(), "AQIDBA==")
XCTAssertEqual(Data([1, 2, 3, 4, 5]).base64EncodedString(), "AQIDBAU=")
XCTAssertEqual(Data([1, 2, 3, 4, 5, 6]).base64EncodedString(), "AQIDBAUG")

XCTAssertEqual(Data([1, 2, 3, 4]).base64EncodedString(options: .omitPaddingCharacter), "AQIDBA")
XCTAssertEqual(Data([1, 2, 3, 4, 5]).base64EncodedString(options: .omitPaddingCharacter), "AQIDBAU")
XCTAssertEqual(Data([1, 2, 3, 4, 5, 6]).base64EncodedString(options: .omitPaddingCharacter), "AQIDBAUG")

XCTAssertEqual(Data([1, 2, 3, 4]).base64EncodedString(options: [.lineLength64Characters]), "AQIDBA==")
XCTAssertEqual(Data([1, 2, 3, 4, 5]).base64EncodedString(options: [.lineLength64Characters]), "AQIDBAU=")
XCTAssertEqual(Data([1, 2, 3, 4, 5, 6]).base64EncodedString(options: [.lineLength64Characters]), "AQIDBAUG")
Expand Down