From 058f9070ada20ab92f05b24e4fcdc68af9261862 Mon Sep 17 00:00:00 2001
From: a dinosaur <dino@a-dinosaur.com>
Date: Sat, 5 Jul 2025 23:25:08 +1000
Subject: [PATCH] Unit tests for index digest

---
 Tests/darwin-apk-tests/IndexDigestTests.swift | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 Tests/darwin-apk-tests/IndexDigestTests.swift

diff --git a/Tests/darwin-apk-tests/IndexDigestTests.swift b/Tests/darwin-apk-tests/IndexDigestTests.swift
new file mode 100644
index 0000000..b1d7b66
--- /dev/null
+++ b/Tests/darwin-apk-tests/IndexDigestTests.swift
@@ -0,0 +1,47 @@
+/*
+ * darwin-apk © 2025 Gay Pizza Specifications
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import Testing
+import Foundation
+@testable import darwin_apk
+
+@Test func testDataHexExtensions() {
+  let dat = Data([
+    252, 197, 0, 65, 100, 194, 41, 76, 236, 129,
+    67, 184, 142, 139, 24, 46, 124, 214, 197, 60])
+
+  #expect(Data(hexEncoded: "BAD") == nil, "Uneven length")
+  #expect(Data(hexEncoded: "fcc5004164c2294cec8143b88e8b182e7cd6c53c") == dat)
+  #expect(Data(hexEncoded: "FCC5004164C2294CEC8143B88E8B182E7CD6C53C") == dat)
+  #expect(dat.asHexString == "FCC5004164C2294CEC8143B88E8B182E7CD6C53C")
+}
+
+@Test func testIndexDigestDecode() {
+  let randomData = { len in
+    Data((0..<len).map { _ in UInt8.random(in: UInt8.min...UInt8.max) })
+  }
+  #expect(ApkIndexDigest(type: .md5, data: randomData(16)) != nil, "MD5 manual constructor")
+  #expect(ApkIndexDigest(type: .sha1, data: randomData(20)) != nil, "SHA-1 manual constructor")
+  #expect(ApkIndexDigest(type: .sha256, data: randomData(32)) != nil, "SHA-2 256 manual constructor")
+
+  #expect(ApkIndexDigest(decode: "X16aafecbf0ab3b0b4946a15197c0976c6bdcb1c89")
+    == .init(type: .sha1, data: Data([
+      106, 175, 236, 191, 10, 179, 176, 180, 148, 106,
+      21, 25, 124, 9, 118, 198, 189, 203, 28, 137])),
+      "Hex (legacy) SHA-1 checksum decoding")
+  #expect(ApkIndexDigest(decode: "Q1agYuAjvQz131ugrr0WQtZBmSbcM=")
+    == .init(type: .sha1, data: Data([
+      106, 6, 46, 2, 59, 208, 207, 93, 245, 186,
+      10, 235, 209, 100, 45, 100, 25, 146, 109, 195])),
+      "Base64 SHA-1 checksum decoding")
+  #expect(ApkIndexDigest(decode: "Q2RgDygGjQ6TBE38nLvdy9txh/PuRqm9bfmPppU6fCBqQ=")
+    == .init(type: .sha256, data: Data([
+      70, 0, 242, 128, 104, 208, 233, 48, 68, 223, 201, 203, 189, 220, 189, 183,
+      24, 127, 62, 228, 106, 155, 214, 223, 152, 250, 105, 83, 167, 194, 6, 164])),
+      "Base64 SHA-256 checksum decoding")
+
+  #expect(ApkIndexDigest(decode: "Q1fAC5FUAUZuBpW1uE01XS4pCKcYg=")?.description
+    == "[SHA-1] 7C00B915401466E0695B5B84D355D2E2908A7188", "Decode to description")
+}