preserve sort integrity between executions to calculate heads raw

minor
automerge · Jul 12, 2024 · 84896a2 · 84896a2
1 parent 5fa3988
commit 84896a2
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Showing 2 changed files with 3 additions and 3 deletions.
diff --git a/Sources/Automerge/ChangeHash.swift b/Sources/Automerge/ChangeHash.swift
@@ -18,7 +18,7 @@ public extension Set<ChangeHash> {
     /// and retrieval of document states.
     func raw() -> Data {
         let rawBytes = map(\.bytes).sorted { lhs, rhs in
-            lhs.hashValue > rhs.hashValue
+            lhs.debugDescription > rhs.debugDescription
         }
         return Data(rawBytes.joined())
     }
@@ -28,7 +28,7 @@ public extension Data {
 
     /// Returns the related set of changes of a state representation within an Automerge document.
     func heads() -> Set<ChangeHash>? {
-        let rawBytes = Array(self)
+        let rawBytes: [UInt8] = Array(self)
         guard rawBytes.count % 32 == 0 else { return nil }
         let totalHashes = rawBytes.count / 32
         let heads = (0..<totalHashes).map { index in

diff --git a/Tests/AutomergeTests/TestChanges.swift b/Tests/AutomergeTests/TestChanges.swift
@@ -113,7 +113,7 @@ class ChangeSetTests: XCTestCase {
         try doc.merge(other: doc2)
         try doc.merge(other: doc3)
 
-        let rawHashes = (0..<100).map { _ in doc.heads().raw().hashValue }
+        let rawHashes = (0..<500).map { _ in doc.heads().raw() }
 
         XCTAssertEqual(Set(rawHashes).count, 1)
     }