42055d6f50
This change should have no user impact. `NSData#isAnimatedPngData` detects whether something is an animated PNG. Its tests don't actually check a real APNG, though. This adds such a test.
54 lines
1.7 KiB
Swift
54 lines
1.7 KiB
Swift
//
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// Copyright (c) 2022 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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import XCTest
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@testable import SignalServiceKit
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class NSDataImageTests: XCTestCase {
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func testIsAnimatedPngData_png() {
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let image = UIImage(color: .red, size: CGSize(width: 1, height: 1))
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let data = image.pngData()!
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let isApng = (data as NSData).isAnimatedPngData()
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XCTAssertEqual(isApng?.boolValue, false)
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}
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func testIsAnimatedPngData_apng() {
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let data: Data = {
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let testBundle = Bundle(for: Self.self)
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let url = testBundle.url(forResource: "test-apng", withExtension: "png")!
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return try! Data(contentsOf: url)
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}()
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let isApng = (data as NSData).isAnimatedPngData()
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XCTAssertEqual(isApng?.boolValue, true)
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}
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func testIsAnimatedPngData_invalid() {
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do {
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let data = Randomness.generateRandomBytes(0)
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let isApng: NSNumber? = (data as NSData).isAnimatedPngData()
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XCTAssertNil(isApng)
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}
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do {
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let data = Randomness.generateRandomBytes(1)
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let isApng: NSNumber? = (data as NSData).isAnimatedPngData()
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XCTAssertNil(isApng)
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}
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do {
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let data = Randomness.generateRandomBytes(64)
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let isApng: NSNumber? = (data as NSData).isAnimatedPngData()
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Logger.verbose("isApng: \(String(describing: isApng))")
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XCTAssertNil(isApng)
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}
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do {
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let data = Randomness.generateRandomBytes(1024)
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let isApng: NSNumber? = (data as NSData).isAnimatedPngData()
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Logger.verbose("isApng: \(String(describing: isApng))")
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XCTAssertNil(isApng)
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}
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}
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}
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