MathFont and MathTable added, both do not rely on existing SwifthMath code.

Tests/SwiftMathTests/MathFontTests.swift

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+import XCTest
+@testable import SwiftMath
+
+//
+//  MathFontTests.swift
+//  
+//
+//  Created by Peter Tang on 12/9/2023.
+//
+
+final class MathFontTests: XCTestCase {
+    func testMathFontScript() throws {
+        // for family in UIFont.familyNames.sorted() {
+        //     let names = UIFont.fontNames(forFamilyName: family)
+        //     print("Family: \(family) Font names: \(names)")
+        // }
+        let size = Int.random(in: 20 ... 40)
+        MathFont.allCases.forEach {
+            // print("\(#function) cgfont \($0.cgFont())")
+            // print("\(#function) ctfont \($0.ctFont(withSize: CGFloat(size)))")
+            XCTAssertNotNil($0.cgFont())
+            XCTAssertNotNil($0.ctFont(withSize: CGFloat(size)))
+            XCTAssertEqual($0.ctFont(withSize: CGFloat(size))?.fontSize, CGFloat(size), "ctFont fontSize test")
+        }
+    }
+}

Tests/SwiftMathTests/MathTableTests.swift

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+import XCTest
+@testable import SwiftMath
+
+//
+//  MathTableTests.swift
+//
+//
+//  Created by Peter Tang on 12/9/2023.
+//
+
+final class MathTableTests: XCTestCase {
+    func testMathFontScript() throws {
+        let size = Int.random(in: 20 ... 40)
+        MathFont.allCases.forEach {
+            // print("\(#function) cgfont \($0.cgFont())")
+            // print("\(#function) ctfont \($0.ctFont(withSize: CGFloat(size)))")
+            // XCTAssertNotNil($0.cgFont())
+            // XCTAssertNotNil($0.ctFont(withSize: CGFloat(size)))
+            // XCTAssertEqual($0.ctFont(withSize: CGFloat(size))?.fontSize, CGFloat(size), "ctFont fontSize test")
+            let ctFont = $0.ctFont(withSize: CGFloat(size))
+            if let unitsPerEm = ctFont?.unitsPerEm {
+                let mathTable = MathTable(withFont: $0, fontSize: CGFloat(size), unitsPerEm: unitsPerEm)
+                
+                let values = [
+                mathTable.fractionNumeratorDisplayStyleShiftUp,
+                mathTable.fractionNumeratorShiftUp,
+                mathTable.fractionDenominatorDisplayStyleShiftDown,
+                mathTable.fractionDenominatorShiftDown,
+                mathTable.fractionNumeratorDisplayStyleGapMin,
+                mathTable.fractionNumeratorGapMin,
+                ]
+                print("\(ctFont) -> \(values)")
+            }
+        }
+    }
+}