Fix GraphHostTests on Ubuntu

Author: Dark-Existed

Tests/OpenSwiftUITests/Core/Graph/GraphHostTests.swift

@@ -8,6 +8,7 @@ import Testing
 struct GraphHostTests {
     @Test
     func setTimeTest() {
+        #if canImport(Darwin)
         let graphHost = GraphHost(data: .init())
         #expect(graphHost.data.time.seconds == 0.0)
 
@@ -17,10 +18,10 @@ struct GraphHostTests {
         graphHost.setTime(Time.infinity)
         #expect(graphHost.data.time.seconds == Time.infinity.seconds)
 
-        #if canImport(QuartzCore)
         let timeNow = Time.now
         graphHost.setTime(timeNow)
         #expect(graphHost.data.time.seconds == timeNow.seconds)
         #endif
     }
 }
+