Fix regression where be and beIdenticalTo matchers stopped matching against AnyObject protocols (#1183)

* Fix regression where be and beIdenticalTo matchers stopped matching against AnyObject protocols

* Fix build issue on older versions of swift

Author: younata

Sources/Nimble/Matchers/BeIdenticalTo.swift

@@ -1,6 +1,16 @@
 /// A Nimble matcher that succeeds when the actual value is the same instance
 /// as the expected instance.
 public func beIdenticalTo<T: AnyObject>(_ expected: T?) -> Matcher<T> {
+    _beIdenticalTo(expected)
+}
+
+/// A Nimble matcher that succeeds when the actual value is the same instance
+/// as the expected instance.
+public func beIdenticalTo(_ expected: AnyObject?) -> Matcher<AnyObject> {
+    _beIdenticalTo(expected)
+}
+
+private func _beIdenticalTo<T: AnyObject>(_ expected: T?) -> Matcher<T> {
     return Matcher.define { actualExpression in
         let actual = try actualExpression.evaluate()
 
@@ -36,7 +46,15 @@ public func !== (lhs: AsyncExpectation<AnyObject>, rhs: AnyObject?) async {
 ///
 /// Alias for "beIdenticalTo".
 public func be<T: AnyObject>(_ expected: T?) -> Matcher<T> {
-    return beIdenticalTo(expected)
+    return _beIdenticalTo(expected)
+}
+
+/// A Nimble matcher that succeeds when the actual value is the same instance
+/// as the expected instance.
+///
+/// Alias for "beIdenticalTo".
+public func be(_ expected: AnyObject?) -> Matcher<AnyObject> {
+    return _beIdenticalTo(expected)
 }
 
 #if canImport(Darwin)

Tests/NimbleTests/Matchers/BeIdenticalToObjectTest.swift

@@ -12,10 +12,21 @@ final class BeIdenticalToObjectTest: XCTestCase {
 
     func testBeIdenticalToPositive() {
         expect(self.testObjectA).to(beIdenticalTo(testObjectA))
+    }
+
+    func testbeIdenticalToAsSubmatcher() {
         // check that the typing works out when used as a submatcher.
+        expect(self.testObjectA).to(map({ $0 }, be(testObjectA)))
         expect(self.testObjectA).to(map({ $0 }, beIdenticalTo(testObjectA)))
     }
 
+    func testBeIdenticalToAnyObjectProtocol() {
+        let object = AnObjectImplementation()
+
+        expect(object as AnObjectProtocol).to(be(object))
+        expect(object as AnObjectProtocol).to(beIdenticalTo(object))
+    }
+
     func testBeIdenticalToNegative() {
         expect(self.testObjectA).toNot(beIdenticalTo(testObjectB))
     }
@@ -54,5 +65,9 @@ final class BeIdenticalToObjectTest: XCTestCase {
         expect(self.testObjectA) === testObjectA
         expect(self.testObjectA) !== testObjectB
     }
+}
 
+private protocol AnObjectProtocol: AnyObject {}
+private final class AnObjectImplementation: AnObjectProtocol {
+    init() {}
 }