import XCTest
@testable import Util

let allScalars = Unicode.Scalar.allScalars

class AllScalarsTests: XCTestCase {
  func testCollectionConformance() {
    let calculatedCount = (0...0xD7FF).count + (0xE000...0x10FFFF).count
    XCTAssertEqual(calculatedCount, allScalars.count)
    XCTAssertEqual(calculatedCount, allScalars.reduce(0, { sum, _ in sum + 1 }))
  }
  
  func testIndexOf() throws {
    for scalar in "béड🥰 \u{0} \u{D7FF} \u{E000} \u{10FFFF}".unicodeScalars {
      let i = try XCTUnwrap(allScalars.firstIndex(of: scalar))
      XCTAssertEqual(scalar, allScalars[i])
    }
  }
  
  func testProperties() throws {
    let whitespaces = allScalars.filter { $0.properties.isWhitespace }
    XCTAssertEqual(25, whitespaces.count)
    
    let numericIndices = allScalars
      .indices
      .filter { allScalars[$0].properties.numericType == .decimal }
    XCTAssertEqual(650, numericIndices.count)
    
    let digitSum = try numericIndices
      .map { try XCTUnwrap(allScalars[$0].properties.numericValue) }
      .reduce(0, +)
    XCTAssertEqual(2925, digitSum)
    XCTAssertEqual(4.5, digitSum / Double(numericIndices.count))
  }
}

Add unit tests for AllScalars
Add unit tests for AllScalars
