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+//
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+// FLEXTests.m
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+// FLEXTests
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+//
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+// Created by Tanner Bennett on 8/27/19.
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+// Copyright © 2019 Flipboard. All rights reserved.
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+//
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+
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+#import <XCTest/XCTest.h>
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+#import <objc/runtime.h>
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+#import "NSObject+Reflection.h"
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+#import "NSArray+Functional.h"
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+#import "FLEXPropertyAttributes.h"
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+#import "FLEXProperty.h"
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+#import "FLEXUtility.h"
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+#import "FLEXMethod.h"
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+
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+@interface Subclass : NSObject @end
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+@implementation Subclass @end
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+
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+@interface FLEXTests : XCTestCase
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+@property (nonatomic, setter=setMyFoo:) id foo;
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+@end
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+
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+@implementation FLEXTests
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+
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+- (void)testRuntimeAdditions {
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+ XCTAssertEqual(1, [NSObject flex_classHierarchy].count);
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+ XCTAssertEqual(4, [FLEXTests flex_classHierarchy].count);
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+ XCTAssertEqual([FLEXTests flex_classHierarchy].firstObject, [self class]);
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+ XCTAssertEqual([FLEXTests flex_classHierarchy].lastObject, [NSObject class]);
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+}
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+
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+- (void)testAssumptionsAboutClasses {
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+ Class cls = [self class];
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+ Class meta = objc_getMetaClass(NSStringFromClass(cls).UTF8String);
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+
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+ // Subsequent `class` calls yield self
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+ XCTAssertEqual(cls, [cls class]);
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+ XCTAssertEqual(meta, [meta class]);
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+ // A class's superclass is NOT a metaclass
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+ XCTAssertFalse(class_isMetaClass([cls superclass]));
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+ // A metaclass's superclass IS a metaclass
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+ XCTAssertTrue(class_isMetaClass([meta superclass]));
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+
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+ // Subsequent object_getClass calls yield metaclass
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+ XCTAssertEqual(object_getClass(cls), meta);
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+ XCTAssertEqual(object_getClass(meta), meta);
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+
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+ // Superclass of a root class is nil
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+ XCTAssertNil([NSObject superclass]);
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+}
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+
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+- (void)testAssumptionsAboutMessageSending {
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+ // "instances respond to selector" works with metaclasses targeting class objects
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+ Class meta = object_getClass(NSBundle.class);
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+ XCTAssertTrue([meta instancesRespondToSelector:@selector(mainBundle)]);
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+ XCTAssertFalse([meta respondsToSelector:@selector(mainBundle)]);
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+}
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+
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+- (void)testAssumptionsAboutRuntimeMethodFunctions {
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+ Class cls = [NSBundle class];
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+ Class meta = object_getClass(cls);
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+
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+ Method bundleID = class_getInstanceMethod(cls, @selector(bundleIdentifier));
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+ Method mainBundle = class_getClassMethod(cls, @selector(mainBundle));
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+
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+ // Preconditions...
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+ XCTAssert(class_isMetaClass(meta));
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+ XCTAssert(bundleID != nil);
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+ XCTAssert(mainBundle != nil);
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+
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+ // Metaclasses cannot find instance methods
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+ XCTAssertEqual(nil, class_getInstanceMethod(meta, @selector(bundleIdentifier)));
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+ // Metaclasses can find class methods as both class methods and instance methods,
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+ // and the methods found by metaclasses are equal regardless of which function is used
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+ XCTAssertEqual(mainBundle, class_getClassMethod(meta, @selector(mainBundle)));
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+ // Metaclasses can find class methods as instance methods
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+ XCTAssertEqual(mainBundle, class_getInstanceMethod(meta, @selector(mainBundle)));
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+}
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+
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+- (void)testAbilitiesOfKVC {
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+ [self setValue:@5 forKey:@"foo"];
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+ XCTAssertEqualObjects(self.foo, @5);
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+}
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+
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+- (void)testCPPTypeEncoding {
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+ const char *type = "{basic_string<char, std::__1::char_traits<char>, "
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+ "std::__1::allocator<char> >={__compressed_pair<std::__1::basic_string<char, "
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+ "std::__1::char_traits<char>, std::__1::allocator<char> >::__rep, "
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+ "std::__1::allocator<char> >={__rep}}}";
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+
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+ XCTAssertThrows(NSGetSizeAndAlignment(type, nil, nil));
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+}
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+
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+- (void)testGetClassProperties {
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+ NSArray *props = [NSBundle flex_allClassProperties];
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+ props = [props flex_filtered:^BOOL(FLEXProperty *obj, NSUInteger idx) {
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+ return [obj.name isEqualToString:@"mainBundle"];
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+ }];
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+ XCTAssert(props.count == 1);
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+}
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+
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+@end
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Tanner Bennett