Clamped with Range extension in Swift

Clamped.swift

import UIKit
import XCTest
import PlaygroundSupport

extension Int {
    func clamped(_ range: Range<Self>) -> Self {
        if range.contains(self) {
            return self
        }

        return self < range.lowerBound ? range.lowerBound : range.upperBound - 1
    }
}

extension Numeric where Self: Comparable {
    func clamped(_ range: ClosedRange<Self>) -> Self {
        if range.contains(self) {
            return self
        }

        return self < range.lowerBound ? range.lowerBound : range.upperBound
    }
}

class ClampedTest: XCTestCase {
    func testIntClosedRange() {
        XCTAssertEqual(0.clamped(1...10), 1)
        XCTAssertEqual(5.clamped(1...10), 5)
        XCTAssertEqual(15.clamped(1...10), 10)
    }

    func testIntRange() {
        XCTAssertEqual(0.clamped(1..<10), 1)
        XCTAssertEqual(5.clamped(1..<10), 5)
        XCTAssertEqual(15.clamped(1..<10), 9)
    }

    func testFloatClosedRange() {
        XCTAssertEqual(Float(0).clamped(1.1...11.1), 1.1)
        XCTAssertEqual(Float(5).clamped(1.1...11.1), 5)
        XCTAssertEqual(Float(15).clamped(1.1...11.1), 11.1)
    }

    func testCGFloatClosedRange() {
        XCTAssertEqual(CGFloat(0).clamped(1.1...11.1), 1.1)
        XCTAssertEqual(CGFloat(5).clamped(1.1...11.1), 5)
        XCTAssertEqual(CGFloat(15).clamped(1.1...11.1), 11.1)
    }
}

ClampedTest.defaultTestSuite.run()