Merge branch 'feature/entity-components' into develop

Sources/FirebladeECS/Entity.swift

@@ -125,6 +125,37 @@ public struct Entity {
     public var numChildren: Int {
         nexus.numChildren(for: self)
     }
+
+    /// Returns an iterator over all components of this entity.
+    @inlinable
+    public func makeComponentsIterator() -> ComponentsIterator {
+        ComponentsIterator(nexus: nexus, entityIdentifier: identifier)
+    }
+
+    /// Returns a sequence of all componenents of this entity.
+    @inlinable
+    public func allComponents() -> AnySequence<Component> {
+        AnySequence { self.makeComponentsIterator() }
+    }
+}
+
+extension Entity {
+    public struct ComponentsIterator: IteratorProtocol {
+        private var iterator: AnyIterator<Component>
+
+        @usableFromInline
+        init(nexus: Nexus, entityIdentifier: EntityIdentifier) {
+            if let comps = nexus.get(components: entityIdentifier) {
+                iterator = AnyIterator<Component>(comps.compactMap { nexus.get(component: $0, for: entityIdentifier) }.makeIterator())
+            } else {
+                iterator = AnyIterator { nil }
+            }
+        }
+
+        public mutating func next() -> Component? {
+            iterator.next()
+        }
+    }
 }
 
 extension Entity: Equatable {

Tests/FirebladeECSTests/EntityTests.swift

@@ -5,7 +5,6 @@
 //  Created by Christian Treffs on 22.10.17.
 //
 
-#if DEBUG
 @testable import FirebladeECS
 import XCTest
 
@@ -22,5 +21,33 @@ class EntityTests: XCTestCase {
         XCTAssertEqual(max, EntityIdentifier.invalid)
         XCTAssertEqual(max.id, Int(UInt32.max))
     }
+
+    func testAllComponentsOfEntity() {
+        let nexus = Nexus()
+
+        let pos = Position(x: 1, y: 2)
+        let name = Name(name: "Hello")
+        let vel = Velocity(a: 1.234)
+
+        let entity = nexus.createEntity()
+        entity.assign(pos)
+        entity.assign(name)
+        entity.assign(vel)
+
+        let expectedComponents: [Component] = [pos, name, vel]
+        let allComponents = entity.allComponents()
+
+        XCTAssertTrue(allComponents.elementsEqualUnordered(expectedComponents) { $0 === $1 })
+    }
+}
+
+extension Sequence {
+    func elementsEqualUnordered<OtherSequence>(_ other: OtherSequence, by areEquivalent: (Element, OtherSequence.Element) throws -> Bool) rethrows -> Bool where OtherSequence: Sequence {
+        for element in self {
+            if try !other.contains(where: { try areEquivalent(element, $0) }) {
+                return false
+            }
+        }
+        return true
+    }
 }
-#endif

Tests/FirebladeECSTests/FamilyTests.swift

@@ -5,7 +5,6 @@
 //  Created by Christian Treffs on 09.10.17.
 //
 
-#if DEBUG
 @testable import FirebladeECS
 import XCTest
 
@@ -186,4 +185,3 @@ class FamilyTests: XCTestCase {
         XCTAssertEqual(family.memberIds.count, count + (count / 2))
     }
 }
-#endif

Tests/FirebladeECSTests/HashingTests.swift

@@ -5,7 +5,6 @@
 //  Created by Christian Treffs on 16.10.17.
 //
 
-#if DEBUG
 @testable import FirebladeECS
 import XCTest
 
@@ -65,4 +64,3 @@ class HashingTests: XCTestCase {
 
     }
 }
-#endif

Tests/FirebladeECSTests/NexusTests.swift

@@ -5,7 +5,6 @@
 //  Created by Christian Treffs on 09.10.17.
 //
 
-#if DEBUG
 @testable import FirebladeECS
 import XCTest
 
@@ -156,4 +155,3 @@ class NexusTests: XCTestCase {
         XCTAssert(pB.y != pA.y)
     }
 }
-#endif

Tests/FirebladeECSTests/SingleTests.swift

@@ -5,7 +5,6 @@
 //  Created by Christian Treffs on 13.02.19.
 //
 
-#if DEBUG
 @testable import FirebladeECS
 import XCTest
 
@@ -63,4 +62,3 @@ class SingleTests: XCTestCase {
         XCTAssertTrue(singleGame === single.component)
     }
 }
-#endif

Tests/FirebladeECSTests/SparseSetTests.swift

@@ -5,7 +5,6 @@
 //  Created by Christian Treffs on 31.10.17.
 //
 
-#if DEBUG
 @testable import FirebladeECS
 import XCTest
 
@@ -540,4 +539,3 @@ class SparseSetTests: XCTestCase {
         XCTAssertEqual(mapped, ["C", "A", "B"])
     }
 }
-#endif

Tests/FirebladeECSTests/SystemsTests.swift

@@ -5,7 +5,6 @@
 //  Created by Christian Treffs on 10.05.18.
 //
 
-#if DEBUG
 @testable import FirebladeECS
 import XCTest
 
@@ -125,4 +124,3 @@ class SystemsTests: XCTestCase {
         }
     }
 }
-#endif

Tests/FirebladeECSTests/XCTestManifests.swift

@@ -25,6 +25,7 @@ extension EntityTests {
     //   `swift test --generate-linuxmain`
     // to regenerate.
     static let __allTests__EntityTests = [
+        ("testAllComponentsOfEntity", testAllComponentsOfEntity),
         ("testEntityIdentifierAndIndex", testEntityIdentifierAndIndex)
     ]
 }