Add exact countdown color boundary tests

Author: jubin-marut

MeetingBar/UI/StatusBar/StatusBarItemController.swift

@@ -540,13 +540,12 @@ func shortenTitle(title: String?, offset: Int) -> String {
     return eventTitle
 }
 
-func countdownColor(for event: MBEvent) -> NSColor {
-    let now = Date()
+func countdownColor(for event: MBEvent, now: Date = Date()) -> NSColor {
     let timeRemaining: TimeInterval
     if event.startDate <= now, event.endDate > now {
-        timeRemaining = event.endDate.timeIntervalSinceNow
+        timeRemaining = event.endDate.timeIntervalSince(now)
     } else {
-        timeRemaining = event.startDate.timeIntervalSinceNow
+        timeRemaining = event.startDate.timeIntervalSince(now)
     }
 
     if timeRemaining >= 15 * 60 {

MeetingBarTests/StatusBarItem/MenuBuilderTests.swift

@@ -257,6 +257,28 @@ final class MenuBuilderEventItemTests: BaseTestCase {
 @MainActor
 final class CountdownColorTests: BaseTestCase {
 
+    func test_countdownColorIsGreenWhenEventStartsExactlyFifteenMinutesFromNow() {
+        let now = Date()
+        let event = makeFakeEvent(
+            id: "GREEN_BOUNDARY",
+            start: now.addingTimeInterval(15 * 60),
+            end: now.addingTimeInterval(45 * 60)
+        )
+
+        XCTAssertEqual(countdownColor(for: event, now: now), .systemGreen)
+    }
+
+    func test_countdownColorIsYellowWhenEventStartsExactlyFiveMinutesFromNow() {
+        let now = Date()
+        let event = makeFakeEvent(
+            id: "YELLOW_BOUNDARY",
+            start: now.addingTimeInterval(5 * 60),
+            end: now.addingTimeInterval(35 * 60)
+        )
+
+        XCTAssertEqual(countdownColor(for: event, now: now), .systemYellow)
+    }
+
     func test_countdownColorIsGreenWhenEventStartsAtLeastFifteenMinutesFromNow() {
         let event = makeFakeEvent(
             id: "GREEN",