[Swift] Migrate to use Swift Testing (#9076)

* Migrating from Xctests to swift testing

This migrates to the new Swift testing framework,
which would allow us to always use the latest tech
from swift moving forward.

* Updates flag to make sure that Wasm testing works

tests/swift/Tests/Flatbuffers/FlatBuffersUnionTests.swift

@@ -14,12 +14,14 @@
  * limitations under the License.
  */
 
-import XCTest
+import Foundation
+import Testing
 
 @testable import FlatBuffers
 
-final class FlatBuffersUnionTests: XCTestCase {
+struct FlatBuffersUnionTests {
 
+  @Test
   func testCreateMonstor() {
 
     var b = FlatBufferBuilder(initialSize: 20)
@@ -36,8 +38,8 @@ final class FlatBuffersUnionTests: XCTestCase {
     b.finish(offset: root)
     let buffer = b.sizedByteArray
     // swiftformat:disable all
-    XCTAssertEqual(
-      buffer,
+    #expect(
+      buffer ==
       [
         16, 0, 0, 0, 0, 0, 10, 0, 16, 0, 8, 0, 7, 0, 12, 0, 10, 0, 0, 0, 0, 0, 0, 1, 8, 0, 0, 0, 20,
         0, 0, 0, 1, 0, 0, 0, 12, 0, 0, 0, 8, 0, 12, 0, 8, 0, 6, 0, 8, 0, 0, 0, 0, 0, 5, 0, 4, 0, 0,
@@ -45,15 +47,16 @@ final class FlatBuffersUnionTests: XCTestCase {
       ])
     // swiftformat:enable all
     let monster = LocalMonster.getRootAsMonster(bb: ByteBuffer(bytes: buffer))
-    XCTAssertEqual(monster.weapon(at: 0)?.dmg, dmg)
-    XCTAssertEqual(monster.weapon(at: 0)?.name, str)
-    XCTAssertEqual(monster.weapon(at: 0)?.nameVector, [65, 120, 101])
+    #expect(monster.weapon(at: 0)?.dmg == dmg)
+    #expect(monster.weapon(at: 0)?.name == str)
+    #expect(monster.weapon(at: 0)?.nameVector == [65, 120, 101])
     let p: Weapon? = monster.equiped()
-    XCTAssertEqual(p?.dmg, dmg)
-    XCTAssertEqual(p?.name, str)
-    XCTAssertEqual(p?.nameVector, [65, 120, 101])
+    #expect(p?.dmg == dmg)
+    #expect(p?.name == str)
+    #expect(p?.nameVector == [65, 120, 101])
   }
 
+  @Test
   func testEndTableFinish() {
     var builder = FlatBufferBuilder(initialSize: 20)
     let sword = builder.create(string: "Sword")
@@ -84,8 +87,8 @@ final class FlatBuffersUnionTests: XCTestCase {
       path: path)
     builder.finish(offset: orc)
     // swiftformat:disable all
-    XCTAssertEqual(
-      builder.sizedByteArray,
+    #expect(
+      builder.sizedByteArray ==
       [
         32, 0, 0, 0, 0, 0, 26, 0, 48, 0, 36, 0, 0, 0, 34, 0, 28, 0, 0, 0, 24, 0, 23, 0, 16, 0, 15,
         0, 8, 0, 4, 0, 26, 0, 0, 0, 44, 0, 0, 0, 104, 0, 0, 0, 0, 0, 0, 1, 60, 0, 0, 0, 0, 0, 0, 0,
@@ -99,6 +102,7 @@ final class FlatBuffersUnionTests: XCTestCase {
     // swiftformat:enable all
   }
 
+  @Test
   func testEnumVector() {
     let vectorOfEnums: [ColorsNameSpace.RGB] = [.blue, .green]
 
@@ -109,8 +113,8 @@ final class FlatBuffersUnionTests: XCTestCase {
     let end = ColorsNameSpace.Monster.endMonster(&builder, start: start)
     builder.finish(offset: end)
     // swiftformat:disable all
-    XCTAssertEqual(
-      builder.sizedByteArray,
+    #expect(
+      builder.sizedByteArray ==
       [
         12, 0, 0, 0, 0, 0, 6, 0, 8, 0, 4, 0, 6, 0, 0, 0, 4, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 1, 0,
         0, 0,
@@ -118,12 +122,13 @@ final class FlatBuffersUnionTests: XCTestCase {
     // swiftformat:enable all
     let monster = ColorsNameSpace.Monster
       .getRootAsMonster(bb: builder.sizedBuffer)
-    XCTAssertEqual(monster.colorsCount, 2)
+    #expect(monster.colorsCount == 2)
     let colors = monster.colors
-    XCTAssertEqual(colors[0], .blue)
-    XCTAssertEqual(colors[1], .green)
+    #expect(colors[0] == .blue)
+    #expect(colors[1] == .green)
   }
 
+  @Test
   func testUnionVector() {
     var fb = FlatBufferBuilder()
 
@@ -149,30 +154,30 @@ final class FlatBuffersUnionTests: XCTestCase {
 
     var buffer = fb.sizedBuffer
     let movie: Movie = getRoot(byteBuffer: &buffer)
-    XCTAssertEqual(movie.charactersType.count, characterType.count)
-    XCTAssertEqual(movie.characters.count, characters.count)
+    #expect(movie.charactersType.count == characterType.count)
+    #expect(movie.characters.count == characters.count)
 
     let bufferCharactersType = movie.charactersType
     for (index, element) in bufferCharactersType.enumerated() {
-      XCTAssertEqual(element, characterType[index])
+      #expect(element == characterType[index])
     }
 
-    XCTAssertEqual(
-      movie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead,
-      7)
-    XCTAssertEqual(
-      movie.characters(at: 1, type: Attacker.self)?.swordAttackDamage,
-      swordDmg)
-    XCTAssertEqual(
-      movie.characters(at: 2, type: BookReader_Mutable.self)?.booksRead,
-      2)
+    #expect(
+      movie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead ==
+        7)
+    #expect(
+      movie.characters(at: 1, type: Attacker.self)?.swordAttackDamage ==
+        swordDmg)
+    #expect(
+      movie.characters(at: 2, type: BookReader_Mutable.self)?.booksRead ==
+        2)
 
     var objc: MovieT? = movie.unpack()
-    XCTAssertEqual(
-      movie.charactersType.count, objc?.characters.count ?? 0)
-    XCTAssertEqual(
-      movie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead,
-      (objc?.characters[0]?.value as? BookReader)?.booksRead)
+    #expect(
+      movie.charactersType.count == objc?.characters.count ?? 0)
+    #expect(
+      movie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead ==
+        (objc?.characters[0]?.value as? BookReader)?.booksRead)
     fb.clear()
     let newMovie = Movie.pack(&fb, obj: &objc)
     fb.finish(offset: newMovie)
@@ -180,17 +185,18 @@ final class FlatBuffersUnionTests: XCTestCase {
     var _buffer = fb.sizedBuffer
     let packedMovie: Movie = getRoot(byteBuffer: &_buffer)
 
-    XCTAssertEqual(
-      packedMovie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead,
-      movie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead)
-    XCTAssertEqual(
-      packedMovie.characters(at: 1, type: Attacker.self)?.swordAttackDamage,
-      movie.characters(at: 1, type: Attacker.self)?.swordAttackDamage)
-    XCTAssertEqual(
-      packedMovie.characters(at: 2, type: BookReader_Mutable.self)?.booksRead,
-      movie.characters(at: 2, type: BookReader_Mutable.self)?.booksRead)
+    #expect(
+      packedMovie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead ==
+        movie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead)
+    #expect(
+      packedMovie.characters(at: 1, type: Attacker.self)?.swordAttackDamage ==
+        movie.characters(at: 1, type: Attacker.self)?.swordAttackDamage)
+    #expect(
+      packedMovie.characters(at: 2, type: BookReader_Mutable.self)?.booksRead ==
+        movie.characters(at: 2, type: BookReader_Mutable.self)?.booksRead)
   }
 
+  @Test
   func testStringUnion() {
     let string = "Awesome \\\\t\t\nstring!"
     var fb = FlatBufferBuilder()
@@ -214,30 +220,31 @@ final class FlatBuffersUnionTests: XCTestCase {
 
     var buffer = fb.sizedBuffer
     let movie: Movie = getRoot(byteBuffer: &buffer)
-    XCTAssertEqual(movie.mainCharacter(type: String.self), string)
-    XCTAssertEqual(
-      movie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead,
-      7)
-    XCTAssertEqual(movie.characters(at: 1, type: String.self), string)
+    #expect(movie.mainCharacter(type: String.self) == string)
+    #expect(
+      movie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead ==
+        7)
+    #expect(movie.characters(at: 1, type: String.self) == string)
 
     var objc: MovieT? = movie.unpack()
-    XCTAssertEqual(objc?.mainCharacter?.value as? String, string)
-    XCTAssertEqual((objc?.characters[0]?.value as? BookReader)?.booksRead, 7)
-    XCTAssertEqual(objc?.characters[1]?.value as? String, string)
+    #expect(objc?.mainCharacter?.value as? String == string)
+    #expect((objc?.characters[0]?.value as? BookReader)?.booksRead == 7)
+    #expect(objc?.characters[1]?.value as? String == string)
     fb.clear()
     let newMovie = Movie.pack(&fb, obj: &objc)
     fb.finish(offset: newMovie)
 
     var _buffer = fb.sizedBuffer
     let packedMovie: Movie = getRoot(byteBuffer: &_buffer)
-    XCTAssertEqual(packedMovie.mainCharacter(type: String.self), string)
-    XCTAssertEqual(
-      packedMovie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead,
-      7)
-    XCTAssertEqual(packedMovie.characters(at: 1, type: String.self), string)
+    #expect(packedMovie.mainCharacter(type: String.self) == string)
+    #expect(
+      packedMovie.characters(at: 0, type: BookReader_Mutable.self)?.booksRead ==
+        7)
+    #expect(packedMovie.characters(at: 1, type: String.self) == string)
   }
 
-  func testEncoding() {
+  @Test
+  func testEncoding() throws {
     let string = "Awesome \\\\t\t\nstring!"
     var fb = FlatBufferBuilder()
 
@@ -265,16 +272,12 @@ final class FlatBuffersUnionTests: XCTestCase {
     Movie.finish(&fb, end: end)
 
     var sizedBuffer = fb.sizedBuffer
-    do {
-      let reader: Movie = try getCheckedRoot(byteBuffer: &sizedBuffer)
-      let encoder = JSONEncoder()
-      encoder.keyEncodingStrategy = .convertToSnakeCase
-      encoder.outputFormatting = [.sortedKeys]
-      let data = try encoder.encode(reader)
-      XCTAssertEqual(String(data: data, encoding: .utf8), jsonData)
-    } catch {
-      XCTFail(error.localizedDescription)
-    }
+    let reader: Movie = try getCheckedRoot(byteBuffer: &sizedBuffer)
+    let encoder = JSONEncoder()
+    encoder.keyEncodingStrategy = .convertToSnakeCase
+    encoder.outputFormatting = [.sortedKeys]
+    let data = try encoder.encode(reader)
+    #expect(String(data: data, encoding: .utf8) == jsonData)
   }
 
   var jsonData: String {