test(mobile/ios): run Swift push tests in CI

Co-authored-by: Tom Brow <tomb@block.xyz>
Signed-off-by: Tom Brow <tomb@block.xyz>

.github/workflows/ci.yml

@@ -64,6 +64,7 @@ jobs:
               - 'scripts/check-file-sizes-core.mjs'
               - 'scripts/check-file-sizes-core.test.mjs'
               - 'mobile/**'
+              - 'crates/buzz-push-gateway/tests/vectors/**'
               - 'scripts/mobile-release.sh'
               - 'scripts/mobile-worktree-overrides.sh'
               - 'scripts/mobile-worktree-clean.sh'
@@ -849,6 +850,19 @@ jobs:
       - name: Build Android debug APK
         run: just mobile-build-android
 
+  mobile-swift:
+    name: Mobile Swift
+    runs-on: macos-latest
+    timeout-minutes: 10
+    needs: [changes]
+    if: needs.changes.outputs.mobile == 'true'
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
+      - name: Build
+        run: swift build --package-path mobile/ios/BuzzPushKit
+      - name: Test
+        run: swift test --package-path mobile/ios/BuzzPushKit
+
   security:
     name: Security
     runs-on: ubuntu-latest

mobile/ios/BuzzPushKit/Package.swift

@@ -15,6 +15,10 @@ let package = Package(
             name: "BuzzPushKit",
             dependencies: [.product(name: "P256K", package: "swift-secp256k1")]
         ),
-        .testTarget(name: "BuzzPushKitTests", dependencies: ["BuzzPushKit"]),
+        .testTarget(
+            name: "BuzzPushKitTests",
+            dependencies: ["BuzzPushKit"],
+            resources: [.copy("Fixtures/app_attest_transcripts.json")]
+        ),
     ]
 )

mobile/ios/BuzzPushKit/Tests/BuzzPushKitTests/BuzzDevPushEnrollmentDriverTests.swift

@@ -470,13 +470,14 @@
     }
 
     private static func fixture() throws -> Fixture {
-      let here = URL(fileURLWithPath: #filePath)
-      let repoRoot = (0..<6).reduce(here) { value, _ in value.deletingLastPathComponent() }
-      let data = try Data(
-        contentsOf: repoRoot.appendingPathComponent(
-          "crates/buzz-push-gateway/tests/vectors/app_attest_transcripts.json"
-        )
+      let path = try XCTUnwrap(
+        Bundle.module.url(
+          forResource: "app_attest_transcripts",
+          withExtension: "json"
+        ),
+        "missing bundled gateway transcript fixture app_attest_transcripts.json in \(Bundle.module.bundleURL.path)"
       )
+      let data = try Data(contentsOf: path)
       return try JSONDecoder().decode(Fixture.self, from: data)
     }
 

mobile/ios/BuzzPushKit/Tests/BuzzPushKitTests/BuzzPushTranscriptTests.swift

@@ -23,21 +23,22 @@ final class BuzzPushTranscriptTests: XCTestCase {
         let vectors: [Vector]
     }
 
-    static let fixture: Fixture = {
-        // Tests/BuzzPushKitTests/… → repo root is five levels up from this file's dir.
-        let here = URL(fileURLWithPath: #filePath)
-        let repoRoot = here
-            .deletingLastPathComponent() // BuzzPushKitTests
-            .deletingLastPathComponent() // Tests
-            .deletingLastPathComponent() // BuzzPushKit
-            .deletingLastPathComponent() // ios
-            .deletingLastPathComponent() // mobile
-            .deletingLastPathComponent() // repo root
-        let path = repoRoot
-            .appendingPathComponent("crates/buzz-push-gateway/tests/vectors/app_attest_transcripts.json")
-        let data = try! Data(contentsOf: path)
-        return try! JSONDecoder().decode(Fixture.self, from: data)
-    }()
+    static func fixture(
+        file: StaticString = #filePath,
+        line: UInt = #line
+    ) throws -> Fixture {
+        let path = try XCTUnwrap(
+            Bundle.module.url(
+                forResource: "app_attest_transcripts",
+                withExtension: "json"
+            ),
+            "missing bundled gateway transcript fixture app_attest_transcripts.json in \(Bundle.module.bundleURL.path)",
+            file: file,
+            line: line
+        )
+        let data = try Data(contentsOf: path)
+        return try JSONDecoder().decode(Fixture.self, from: data)
+    }
 
     // Deterministic inputs mirroring the fixture's `inputs` block.
     static let challengeId = UUID(uuidString: "11111111-1111-4111-8111-111111111111")!
@@ -52,7 +53,7 @@ final class BuzzPushTranscriptTests: XCTestCase {
 
     private func assertMatchesVector(_ name: String, _ bytes: Data,
                                      file: StaticString = #filePath, line: UInt = #line) throws {
-        guard let vector = Self.fixture.vectors.first(where: { $0.name == name }) else {
+        guard let vector = try Self.fixture(file: file, line: line).vectors.first(where: { $0.name == name }) else {
             XCTFail("missing fixture vector \(name)", file: file, line: line)
             return
         }
@@ -123,9 +124,9 @@ final class BuzzPushTranscriptTests: XCTestCase {
         ))
     }
 
-    func testAllFixtureVectorsCovered() {
+    func testAllFixtureVectorsCovered() throws {
         XCTAssertEqual(
-            Set(Self.fixture.vectors.map(\.name)),
+            Set(try Self.fixture().vectors.map(\.name)),
             ["enroll", "delegate", "rotate_endpoint", "revoke_delegation", "revoke_installation"],
             "fixture gained or lost a vector; add/remove the matching known-answer test"
         )

mobile/ios/BuzzPushKit/Tests/BuzzPushKitTests/Fixtures

@@ -0,0 +1 @@
+../../../../../crates/buzz-push-gateway/tests/vectors