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@@ -0,0 +1,130 @@
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+
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+import Foundation
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+import Testing
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+@testable import Trio
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+
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+/// These tests should be an exact copy of the JS tests here:
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+/// - https://github.com/kingst/trio-oref/blob/dev-fixes-for-swift-comparison/tests/determine-basal-glucose-falling-faster-than-expected.test.js
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+@Suite("DosingEngine.glucoseFallingFasterThanExpected") struct DetermineBasalGlucoseFallingFasterThanExpectedTests {
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+ private func defaultProfile() -> Profile {
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+ var profile = Profile()
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+ profile.minBg = 90
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+ profile.targetBg = 100
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+ profile.currentBasal = 1.0
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+ profile.maxDailyBasal = 1.3
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+ profile.maxBasal = 3.5
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+ profile.sens = 50
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+ profile.outUnits = .mgdL
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+ return profile
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+ }
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+
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+ private func defaultGlucoseStatus() -> GlucoseStatus {
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+ GlucoseStatus(
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+ delta: 5,
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+ glucose: 100,
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+ noise: 1,
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+ shortAvgDelta: 0,
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+ longAvgDelta: 0,
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+ date: Date(),
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+ lastCalIndex: nil,
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+ device: "test"
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+ )
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+ }
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+
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+ private func callGlucoseFallingFasterThanExpected(
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+ eventualGlucose: Decimal = 100,
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+ minGlucose: Decimal? = nil,
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+ minDelta: Decimal = 4,
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+ expectedDelta: Decimal = 5,
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+ glucoseStatus: GlucoseStatus? = nil,
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+ currentTemp: TempBasal = TempBasal(duration: 0, rate: 0, temp: .absolute, timestamp: Date()),
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+ basal: Decimal? = nil,
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+ smbIsEnabled: Bool = false,
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+ profile: Profile? = nil,
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+ determination: Determination? = nil
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+ ) throws -> (shouldSetTempBasal: Bool, determination: Determination) {
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+ let testProfile = profile ?? defaultProfile()
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+ let testDetermination = determination ?? Determination(
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+ id: nil,
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+ reason: "",
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+ units: nil,
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+ insulinReq: nil,
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+ eventualBG: nil,
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+ sensitivityRatio: nil,
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+ rate: nil,
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+ duration: nil,
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+ iob: nil,
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+ cob: nil,
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+ predictions: nil,
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+ deliverAt: nil,
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+ carbsReq: nil,
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+ temp: nil,
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+ bg: nil,
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+ reservoir: nil,
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+ isf: nil,
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+ timestamp: nil,
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+ tdd: nil,
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+ current_target: nil,
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+ minDelta: nil,
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+ expectedDelta: nil,
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+ minGuardBG: nil,
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+ minPredBG: nil,
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+ threshold: nil,
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+ carbRatio: nil,
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+ received: nil
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+ )
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+
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+ return try DosingEngine.glucoseFallingFasterThanExpected(
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+ eventualGlucose: eventualGlucose,
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+ minGlucose: minGlucose ?? testProfile.minBg!,
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+ minDelta: minDelta,
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+ expectedDelta: expectedDelta,
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+ glucoseStatus: glucoseStatus ?? defaultGlucoseStatus(),
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+ currentTemp: currentTemp,
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+ basal: basal ?? testProfile.currentBasal!,
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+ smbIsEnabled: smbIsEnabled,
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+ profile: testProfile,
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+ determination: testDetermination
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+ )
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+ }
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+
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+ @Test("Guard: minDelta not less than expectedDelta") func testMinDeltaNotLessThanExpected() throws {
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+ let (shouldSet, determination) = try callGlucoseFallingFasterThanExpected(minDelta: 5, expectedDelta: 5)
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+ #expect(shouldSet == false)
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+ #expect(determination.reason == "")
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+ }
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+
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+ @Test("Guard: SMB is enabled") func testSmbIsEnabled() throws {
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+ let (shouldSet, determination) = try callGlucoseFallingFasterThanExpected(smbIsEnabled: true)
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+ #expect(shouldSet == false)
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+ #expect(determination.reason == "")
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+ }
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+
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+ @Test("Continue current temp") func testContinueCurrentTemp() throws {
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+ let profile = defaultProfile()
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+ let currentTemp = TempBasal(duration: 20, rate: profile.currentBasal!, temp: .absolute, timestamp: Date())
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+ let (shouldSet, determination) = try callGlucoseFallingFasterThanExpected(
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+ currentTemp: currentTemp,
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+ basal: profile.currentBasal!,
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+ profile: profile
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+ )
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+ #expect(shouldSet == true)
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+ #expect(determination.rate == nil) // No change
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+ #expect(determination.reason.contains("temp \(currentTemp.rate) ~ req \(profile.currentBasal!)U/hr."))
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+ }
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+
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+ @Test("Set new temp") func testSetNewTemp() throws {
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+ let profile = defaultProfile()
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+ let currentTemp = TempBasal(duration: 10, rate: 1.0, temp: .absolute, timestamp: Date())
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+ let basal: Decimal = 1.2
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+ let (shouldSet, determination) = try callGlucoseFallingFasterThanExpected(
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+ currentTemp: currentTemp,
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+ basal: basal,
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+ profile: profile
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+ )
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+ #expect(shouldSet == true)
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+ #expect(determination.rate == basal)
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+ #expect(determination.duration == 30)
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+ #expect(determination.reason.contains("setting current basal of \(basal) as temp."))
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+ }
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+}
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Sam King