Add more tests

Sources/FirebladeECS/EntityIdentifierGenerator.swift

@@ -12,8 +12,8 @@ internal final class EntityIdentifierGenerator {
         stack.count
     }
 
-    init() {
-        stack = [0]
+    convenience init() {
+        self.init([EntityIdentifier(0)])
     }
 
     init(_ entityIds: [EntityIdentifier]) {

Tests/FirebladeECSTests/EntityTests.swift

@@ -31,8 +31,7 @@ class EntityTests: XCTestCase {
 
         let entity = nexus.createEntity()
         entity.assign(pos)
-        entity.assign(name)
-        entity.assign(vel)
+        entity.assign(name, vel)
 
         let expectedComponents: [Component] = [pos, name, vel]
         let allComponents = entity.allComponents()
@@ -40,6 +39,25 @@ class EntityTests: XCTestCase {
         XCTAssertTrue(allComponents.elementsEqualUnordered(expectedComponents) { $0 === $1 })
     }
 
+    func testEntityEquality() {
+        let nexus = Nexus()
+
+        let entityA = nexus.createEntity()
+        let entityB = nexus.createEntity()
+
+        XCTAssertEqual(entityA, entityA)
+        XCTAssertNotEqual(entityA, entityB)
+    }
+
+    func testRemoveAllComponentsFromEntity() {
+        let nexus = Nexus()
+
+        let entity = nexus.createEntity(with: Position(x: 1, y: 2), Name(name: "MyEntity"))
+        XCTAssertEqual(entity.numComponents, 2)
+        entity.removeAll()
+        XCTAssertEqual(entity.numComponents, 0)
+    }
+
     func testEntityIdGenerator() {
         let generator = EntityIdentifierGenerator()
 

Tests/FirebladeECSTests/XCTestManifests.swift

@@ -26,8 +26,10 @@ extension EntityTests {
     // to regenerate.
     static let __allTests__EntityTests = [
         ("testAllComponentsOfEntity", testAllComponentsOfEntity),
+        ("testEntityEquality", testEntityEquality),
         ("testEntityIdentifierAndIndex", testEntityIdentifierAndIndex),
-        ("testEntityIdGenerator", testEntityIdGenerator)
+        ("testEntityIdGenerator", testEntityIdGenerator),
+        ("testRemoveAllComponentsFromEntity", testRemoveAllComponentsFromEntity)
     ]
 }