[Swift 6]: Update Exercises batch 4 (#788)

* Update Swift tools version to 6.0 and refactor tests for Collatz Conjecture

* Re-generate test files

Author: meatball133

exercises/practice/clock/.meta/template.swift

@@ -1,31 +1,33 @@
-import XCTest
+import Testing
+import Foundation
 @testable import {{exercise|camelCase}}
-class {{exercise|camelCase}}Tests: XCTestCase {
-    let runAll = Bool(ProcessInfo.processInfo.environment["RUNALL", default: "false"]) ?? false
 
+let RUNALL = Bool(ProcessInfo.processInfo.environment["RUNALL", default: "false"]) ?? false
+
+@Suite struct {{exercise|camelCase}}Tests {
     {% outer: for case in cases %}
         {%- for subCases in case.cases %}
         {%- if forloop.outer.first and forloop.first %}
-            func test{{subCases.description |camelCase }}() {
+            @Test("{{subCases.description}}")
         {%- else %}
-            func test{{subCases.description |camelCase }}() throws {
-            try XCTSkipIf(true && !runAll) // change true to false to run this test
+            @Test("{{subCases.description}}", .enabled(if: RUNALL))
         {%- endif %}
+            func test{{subCases.description |camelCase }}() {
         {%- if subCases.property == "create" %}
-            XCTAssertEqual(Clock(hours: {{subCases.input.hour}}, minutes: {{subCases.input.minute}}).description, "{{subCases.expected}}")
+            #expect(Clock(hours: {{subCases.input.hour}}, minutes: {{subCases.input.minute}}).description == "{{subCases.expected}}")
         {%- elif subCases.property == "add"%}
             let clock = Clock(hours: {{subCases.input.hour}}, minutes: {{subCases.input.minute}}).add(minutes: {{subCases.input.value}})
-            XCTAssertEqual(clock.description, "{{subCases.expected}}")
+            #expect(clock.description == "{{subCases.expected}}")
         {%- elif subCases.property == "subtract" %}
             let clock = Clock(hours: {{subCases.input.hour}}, minutes: {{subCases.input.minute}}).subtract(minutes: {{subCases.input.value}})
-            XCTAssertEqual(clock.description, "{{subCases.expected}}")
+            #expect(clock.description == "{{subCases.expected}}")
         {%- elif subCases.property == "equal" %}
             let clock1 = Clock(hours: {{subCases.input.clock1.hour}}, minutes: {{subCases.input.clock1.minute}})
             let clock2 = Clock(hours: {{subCases.input.clock2.hour}}, minutes: {{subCases.input.clock2.minute}})
             {%- if subCases.expected %}
-            XCTAssertEqual(clock1, clock2)
+            #expect(clock1 == clock2)
             {%- else %}
-            XCTAssertNotEqual(clock1, clock2)
+            #expect(clock1 != clock2)
             {%- endif %}
         {%- endif %}
         }

exercises/practice/clock/Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.3
+// swift-tools-version:6.0
 
 import PackageDescription