Add regression tests for glucose smoothing window limits and update dependencies

Adds tests to ensure fetchGlucose prioritizes the most recent 350 readings when more than 24 hours of data exists. This prevents a bug where the current blood glucose value would be excluded from the smoothing window. Also updates Package.resolved to version 3 with updated dependency pins.

Trio.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -1,6 +1,169 @@
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+        "version" : "1.2024072200.0"
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/google/app-check.git",
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+        "version" : "11.2.0"
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/Kitura/BlueCryptor.git",
+      "state" : {
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+        "version" : "2.0.2"
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+      "location" : "https://github.com/Kitura/BlueECC.git",
+      "state" : {
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+        "version" : "1.2.201"
+      }
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/Kitura/BlueRSA.git",
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+        "version" : "1.0.203"
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+      "location" : "https://github.com/garmin/connectiq-companion-app-sdk-ios",
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+      "location" : "https://github.com/krzyzanowskim/CryptoSwift",
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/googleads/google-ads-on-device-conversion-ios-sdk",
+      "state" : {
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+      "location" : "https://github.com/google/GoogleAppMeasurement.git",
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+      "location" : "https://github.com/google/GoogleDataTransport.git",
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/google/grpc-binary.git",
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+    {
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/google/gtm-session-fetcher.git",
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/Kitura/KituraContracts.git",
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       "kind" : "remoteSourceControl",
       "location" : "https://github.com/maxkonovalov/MKRingProgressView.git",
@@ -10,6 +173,33 @@
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/firebase/nanopb.git",
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+        "version" : "2.30910.0"
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/google/promises.git",
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+        "version" : "2.4.0"
+      }
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/no-comment/SlideButton",
+      "state" : {
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+        "revision" : "5eacebba4d7deeb693592bc9a62ab2d2181e133b"
+      }
+    },
+    {
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       "kind" : "remoteSourceControl",
       "location" : "https://github.com/apple/swift-algorithms",
@@ -19,6 +209,24 @@
       }
     },
     {
+      "identity" : "swift-jwt",
+      "kind" : "remoteSourceControl",
+      "location" : "http://github.com/Kitura/Swift-JWT.git",
+      "state" : {
+        "revision" : "f68ec28fbd90a651597e9e825ea7f315f8d52a1f",
+        "version" : "4.0.1"
+      }
+    },
+    {
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-log.git",
+      "state" : {
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+        "version" : "1.12.0"
+      }
+    },
+    {
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       "kind" : "remoteSourceControl",
       "location" : "https://github.com/apple/swift-numerics",
@@ -28,6 +236,15 @@
       }
     },
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+      "identity" : "swift-protobuf",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-protobuf.git",
+      "state" : {
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+        "version" : "1.37.0"
+      }
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       "kind" : "remoteSourceControl",
       "location" : "https://github.com/ivanschuetz/SwiftCharts.git",
@@ -64,5 +281,5 @@
       }
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   ],
-  "version" : 2
+  "version" : 3
 }

TrioTests/GlucoseSmoothingTests.swift

@@ -217,6 +217,73 @@ import Testing
         }
     }
 
+    // MARK: - fetchGlucose Window Tests
+
+    @Test(
+        "fetchGlucose retains the most recent 350 readings (not the oldest) when 24h holds more than 350"
+    ) func testFetchGlucoseKeepsMostRecentWhenOverLimit() async throws {
+        // GIVEN: 360 readings within the last 24h (3 min spacing => ~18h span).
+        // Each reading carries a unique glucose value so we can verify which subset survives the limit.
+        let count = 360
+        let values: [Int16] = (0 ..< count).map { Int16(100 + $0) }
+        await createGlucoseSequence(values: values, interval: 3 * 60, isManual: false)
+
+        // WHEN
+        let objectIDs = try await fetchGlucoseManager.fetchGlucose(context: testContext)
+
+        // THEN
+        #expect(objectIDs.count == 350, "fetchGlucose should respect the 350 limit, got \(objectIDs.count).")
+
+        await testContext.perform {
+            let fetched = objectIDs.compactMap { self.testContext.object(with: $0) as? GlucoseStored }
+            #expect(fetched.count == 350, "All returned object IDs must resolve to GlucoseStored instances.")
+
+            // Returned order must be oldest-first (chronological) — the smoother walks the array this way.
+            let dates = fetched.compactMap(\.date)
+            #expect(dates == dates.sorted(), "fetchGlucose must return readings in chronological (ascending) order.")
+
+            // The most recent reading (current BG) must be the LAST element after the chronological reverse.
+            #expect(
+                fetched.last?.glucose == Int16(100 + count - 1),
+                "Most recent reading (current BG) must be retained after the 350-limit truncation."
+            )
+
+            // The oldest 10 readings must be dropped — verify the limit cut from the OLD end, not the recent end.
+            let returnedGlucoseValues = Set(fetched.map(\.glucose))
+            #expect(
+                !returnedGlucoseValues.contains(Int16(100)),
+                "Oldest reading must be excluded by the limit (truncation should cut old, not recent)."
+            )
+            #expect(
+                returnedGlucoseValues.contains(Int16(100 + count - 1)),
+                "Newest reading must be included after truncation."
+            )
+        }
+    }
+
+    @Test(
+        "Exponential smoothing writes a smoothed value for the current BG when 24h holds more than 350 readings"
+    ) func testExponentialSmoothingCoversCurrentBGAboveLimit() async throws {
+        // GIVEN: 360 contiguous CGM readings within the last 24h (3 min spacing, no gaps).
+        let count = 360
+        let values: [Int16] = (0 ..< count).map { _ in Int16(120) }
+        await createGlucoseSequence(values: values, interval: 3 * 60, isManual: false)
+
+        // WHEN
+        await fetchGlucoseManager.exponentialSmoothingGlucose(context: testContext)
+
+        // THEN: the most recent reading must have received a smoothed value.
+        // Regression test for the bug where ascending+fetchLimit kept the OLDEST 350 readings,
+        // so the current BG fell outside the smoothing window and was never written.
+        let ascending = try await fetchAndSortGlucose()
+        #expect(ascending.count == count)
+
+        #expect(
+            ascending.last?.smoothedGlucose != nil,
+            "Most recent reading (current BG) must receive a smoothed value when over the 350-row limit."
+        )
+    }
+
     // MARK: - OpenAPS Glucose Selection Tests
 
     @Test("Algorithm uses smoothed glucose when enabled") func testAlgorithmUsesSmoothedGlucose() async throws {