TestMeasurement.swift

// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//

#if !DARWIN_COMPATIBILITY_TESTS     // https://bugs.swift.org/browse/SR-10904
class CustomUnit: Unit {
    required init(symbol: String) {
        super.init(symbol: symbol)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    public static let bugs = CustomUnit(symbol: "bug")
    public static let features = CustomUnit(symbol: "feature")
}
#endif

class TestMeasurement: XCTestCase {
    func testHashing() {
        let lengths: [[Measurement<UnitLength>]] = [
            [
                Measurement(value: 5, unit: UnitLength.kilometers),
                Measurement(value: 5000, unit: UnitLength.meters),
                Measurement(value: 5000, unit: UnitLength.meters),
            ],
            [
                Measurement(value: 1, unit: UnitLength.kilometers),
                Measurement(value: 1000, unit: UnitLength.meters),
            ],
            [
                Measurement(value: 1, unit: UnitLength.meters),
                Measurement(value: 1000, unit: UnitLength.millimeters),
            ],
        ]
        checkHashableGroups(lengths)

        let durations: [[Measurement<UnitDuration>]] = [
            [
                Measurement(value: 3600, unit: UnitDuration.seconds),
                Measurement(value: 60, unit: UnitDuration.minutes),
                Measurement(value: 1, unit: UnitDuration.hours),
            ],
            [
                Measurement(value: 1800, unit: UnitDuration.seconds),
                Measurement(value: 30, unit: UnitDuration.minutes),
                Measurement(value: 0.5, unit: UnitDuration.hours),
            ]
        ]
        checkHashableGroups(durations)

#if !DARWIN_COMPATIBILITY_TESTS
        let custom: [Measurement<CustomUnit>] = [
            Measurement(value: 1, unit: CustomUnit.bugs),
            Measurement(value: 2, unit: CustomUnit.bugs),
            Measurement(value: 3, unit: CustomUnit.bugs),
            Measurement(value: 4, unit: CustomUnit.bugs),
            Measurement(value: 1, unit: CustomUnit.features),
            Measurement(value: 2, unit: CustomUnit.features),
            Measurement(value: 3, unit: CustomUnit.features),
            Measurement(value: 4, unit: CustomUnit.features),
        ]
        checkHashable(custom, equalityOracle: { $0 == $1 })
#endif
    }
    
    let fixtures = [
        Fixtures.zeroMeasurement,
        Fixtures.lengthMeasurement,
        Fixtures.frequencyMeasurement,
        Fixtures.angleMeasurement,
    ]

    func testCodingRoundtrip() throws {
        for fixture in fixtures {
            try fixture.assertValueRoundtripsInCoder()
        }
    }
    
    func testLoadedValuesMatch() throws {
        for fixture in fixtures {
            try fixture.assertLoadedValuesMatch()
        }
    }
    
    static let allTests = [
        ("testHashing", testHashing),
        ("testCodingRoundtrip", testCodingRoundtrip),
        ("testLoadedValuesMatch", testLoadedValuesMatch),
    ]
}