Increase coverage + cleanups

README.md

@@ -3,8 +3,8 @@
 [![github CI](https://github.com/fireblade-engine/ecs/workflows/CI/badge.svg)](https://github.com/fireblade-engine/ecs/actions?query=workflow%3ACI)
 [![codecov](https://codecov.io/gh/fireblade-engine/ecs/branch/master/graph/badge.svg)](https://codecov.io/gh/fireblade-engine/ecs)
 [![documentation](https://github.com/fireblade-engine/ecs/workflows/Documentation/badge.svg)](https://github.com/fireblade-engine/ecs/wiki)  
-[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Ffireblade-engine%2Fecs%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/fireblade-engine/ecs)
+[![spi-swift-versions](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Ffireblade-engine%2Fecs%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/fireblade-engine/ecs)
-[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Ffireblade-engine%2Fecs%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/fireblade-engine/ecs)
+[![spi-swift-platforms](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Ffireblade-engine%2Fecs%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/fireblade-engine/ecs)
 [![platform-webassembly](https://img.shields.io/badge/Platform-WebAssembly-blue.svg)](https://github.com/swiftwasm/swift#swiftwasm)
 
 This is a **dependency free**, **lightweight**, **fast** and **easy to use** [Entity-Component System](https://en.wikipedia.org/wiki/Entity_component_system) implementation in Swift. It is developed and maintained as part of the [Fireblade Game Engine project](https://github.com/fireblade-engine).

Sources/FirebladeECS/EntityIdentifierGenerator.swift

@@ -65,12 +65,11 @@ public struct LinearIncrementingEntityIdGenerator: EntityIdentifierGenerator {
 
         @usableFromInline
         func nextId() -> EntityIdentifier {
-            if stack.count == 1 {
+            guard stack.count == 1 else {
-                defer { stack[0] += 1 }
-                return EntityIdentifier(stack[0])
-            } else {
                 return EntityIdentifier(stack.removeLast())
             }
+            defer { stack[0] += 1 }
+            return EntityIdentifier(stack[0])
         }
 
         @usableFromInline

Sources/FirebladeECS/Hashing.swift

@@ -45,15 +45,6 @@ public func hash(combine seed: Int, _ value: Int) -> Int {
     return Int(bitPattern: uSeed)
 }
 
-/// Calculates the combined hash value of the elements. This implementation is based on boost::hash_range.
-/// Is sensitive to the order of the elements.
-/// - Parameter hashValues: sequence of hash values to combine.
-/// - Returns: combined hash value.
-public func hash<S: Sequence>(combine hashValues: S) -> Int where S.Element == Int {
-    /// http://www.boost.org/doc/libs/1_65_1/doc/html/hash/reference.html#boost.hash_range_idp517643120
-    hashValues.reduce(0) { hash(combine: $0, $1) }
-}
-
 /// Calculates the combined hash value of the elements. This implementation is based on boost::hash_range.
 /// Is sensitive to the order of the elements.
 /// - Parameter hashValues: sequence of hash values to combine.

Sources/FirebladeECS/Nexus+Internal.swift

@@ -59,10 +59,6 @@ extension Nexus {
         componentIdsByEntity[entityId]!.insert(componentId)
     }
 
-    func assign(_ componentIds: Set<ComponentIdentifier>, _ entityId: EntityIdentifier) {
-        componentIdsByEntity[entityId]!.formUnion(componentIds)
-    }
-
     func update(familyMembership entityId: EntityIdentifier) {
         // FIXME: iterating all families is costly for many families
         // FIXME: this could be parallelized

Sources/FirebladeECS/UnorderedSparseSet.swift

@@ -75,10 +75,7 @@ public struct UnorderedSparseSet<Element, Key: Hashable & Codable> {
                 return nil
             }
             let entry = self.dense[denseIndex]
-            guard entry.key == key else {
+            assert(entry.key == key, "entry.key and findIndex(at: key) must be equal!")
-                return nil
-            }
-
             return entry.element
         }
 

Tests/FirebladeECSTests/FamilyTests.swift

@@ -35,6 +35,8 @@ class FamilyTests: XCTestCase {
         XCTAssertEqual(nexus.numFamilies, 1)
         XCTAssertEqual(nexus.numComponents, 0)
         XCTAssertEqual(nexus.numEntities, 0)
+        XCTAssertFalse(family.traits.description.isEmpty)
+        XCTAssertFalse(family.traits.debugDescription.isEmpty)
 
         let traits = FamilyTraitSet(requiresAll: [Position.self], excludesAll: [Name.self])
         XCTAssertEqual(family.traits, traits)

Tests/FirebladeECSTests/NexusTests.swift

@@ -33,6 +33,7 @@ class NexusTests: XCTestCase {
 
         XCTAssert(e1.identifier.id == 1)
         XCTAssert(nexus.numEntities == 2)
+        XCTAssertFalse(nexus.debugDescription.isEmpty)
     }
 
     func testEntityDestroy() {