Add identifier tests

Tests/FirebladeECSPerformanceTests/TypeIdentifierPerformanceTests.swift

@@ -0,0 +1,73 @@
+//
+//  TypeIdentifierPerformanceTests.swift
+//  
+//
+//  Created by Christian Treffs on 05.10.19.
+//
+
+import XCTest
+
+final class TypeIdentifierPerformanceTests: XCTestCase {
+    let maxIterations: Int = 100_000
+    
+    // 0.056 sec
+    func testPerformanceObjectIdentifier() {
+        measure {
+            for _ in 0..<maxIterations {
+                _ = ObjectIdentifier(Color.self)
+                _ = ObjectIdentifier(EmptyComponent.self)
+                _ = ObjectIdentifier(Name.self)
+                _ = ObjectIdentifier(Party.self)
+                _ = ObjectIdentifier(Position.self)
+                _ = ObjectIdentifier(SingleGameState.self)
+                _ = ObjectIdentifier(Velocity.self)
+            }
+        }
+    }
+    
+    // 1.451 sec
+    func testPerformanceStringDescribing() {
+        measure {
+            for _ in 0..<maxIterations {
+                _ = String(describing: Color.self)
+                _ = String(describing: EmptyComponent.self)
+                _ = String(describing: Name.self)
+                _ = String(describing: Party.self)
+                _ = String(describing: Position.self)
+                _ = String(describing: SingleGameState.self)
+                _ = String(describing: Velocity.self)
+            }
+        }
+    }
+    
+    // 1.587 sec
+    func testPerformanceStringReflecting() {
+        measure {
+            for _ in 0..<maxIterations {
+                _ = String(reflecting: Color.self)
+                _ = String(reflecting: EmptyComponent.self)
+                _ = String(reflecting: Name.self)
+                _ = String(reflecting: Party.self)
+                _ = String(reflecting: Position.self)
+                _ = String(reflecting: SingleGameState.self)
+                _ = String(reflecting: Velocity.self)
+            }
+        }
+    }
+    
+    // 2.817 sec
+    func testPerformanceMirrorReflectingDescription() {
+        measure {
+            for _ in 0..<maxIterations {
+                _ = Mirror(reflecting: Color.self).description
+                _ = Mirror(reflecting: EmptyComponent.self).description
+                _ = Mirror(reflecting: Name.self).description
+                _ = Mirror(reflecting: Party.self).description
+                _ = Mirror(reflecting: Position.self).description
+                _ = Mirror(reflecting: SingleGameState.self).description
+                _ = Mirror(reflecting: Velocity.self).description
+            }
+        }
+    }
+    
+}

Tests/FirebladeECSTests/ComponentIdentifierTests.swift

@@ -0,0 +1,23 @@
+//
+//  ComponentIdentifierTests.swift
+//  
+//
+//  Created by Christian Treffs on 05.10.19.
+//
+import XCTest
+
+final class ComponentIdentifierTests: XCTestCase {
+    
+    func testMirrorAsStableIdentifier() {
+        let m = String(reflecting: Position.self)
+        let identifier: String = m
+        XCTAssertEqual(identifier, "FirebladeECSTests.Position")
+    }
+    
+    func testStringDescribingAsStableIdentifier() {
+        let s = String(describing: Position.self)
+        let identifier: String = s
+        XCTAssertEqual(identifier, "Position")
+    }
+}
+