0.10.6

Tests/ChatTimelineEntryTests.swift

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+import XCTest
+@testable import Luma
+
+final class ChatTimelineEntryTests: XCTestCase {
+    func testDayBoundariesArePrecomputedOnceForStableRows() {
+        var calendar = Calendar(identifier: .gregorian)
+        calendar.timeZone = TimeZone(secondsFromGMT: 0)!
+        let first = ChatMessage(
+            id: "first",
+            conversationID: "friend@example.org",
+            senderJID: "friend@example.org",
+            body: "one",
+            timestamp: Date(timeIntervalSince1970: 1_704_067_200),
+            direction: .incoming,
+            delivery: .delivered,
+            security: .plaintext
+        )
+        var sameDay = first
+        sameDay.body = "two"
+        sameDay.timestamp = first.timestamp.addingTimeInterval(60)
+        let sameDayMessage = ChatMessage(
+            id: "same-day",
+            conversationID: sameDay.conversationID,
+            senderJID: sameDay.senderJID,
+            body: sameDay.body,
+            timestamp: sameDay.timestamp,
+            direction: sameDay.direction,
+            delivery: sameDay.delivery,
+            security: sameDay.security
+        )
+        let nextDay = ChatMessage(
+            id: "next-day",
+            conversationID: first.conversationID,
+            senderJID: first.senderJID,
+            body: "three",
+            timestamp: first.timestamp.addingTimeInterval(86_400),
+            direction: .incoming,
+            delivery: .delivered,
+            security: .plaintext
+        )
+
+        let entries = ChatTimelineEntry.make(
+            from: [first, sameDayMessage, nextDay],
+            calendar: calendar
+        )
+
+        XCTAssertEqual(entries.map(\.id), ["first", "same-day", "next-day"])
+        XCTAssertEqual(entries.map(\.startsNewDay), [true, false, true])
+    }
+}