A MOAspects test case for instance object with class hierarchy

gistfile1.txt

- (void)testChildInstance
{
    NSString *string;
    MOAspectsTestChildObject* testChildObj = [[MOAspectsTestChildObject alloc] init];
    string = [testChildObj stringWithBOOL:YES];
    XCTAssertTrue([string isEqualToString:@"真"]);
    string = [testChildObj stringWithBOOL:NO];
    XCTAssertTrue([string isEqualToString:@"偽"]);
    
    __block NSString *hookedString;
    [MOAspects hookClassMethodForClass:[testChildObj class]
                              selector:@selector(stringWithBOOL:)
                       aspectsPosition:MOAspectsPositionBefore
                            usingBlock:^(id target, BOOL BOOLVar){
                                hookedString = BOOLVar ? @"真" : @"偽";
                            }];
    hookedString = nil;
    string = [testChildObj stringWithBOOL:YES];
    XCTAssertTrue([string isEqualToString:@"真"]);
    XCTAssertNotNil(hookedString);
    XCTAssertTrue([string isEqualToString:hookedString]);
    
    hookedString = nil;
    string = [testChildObj stringWithBOOL:NO];
    XCTAssertTrue([string isEqualToString:@"偽"]);
    XCTAssertNotNil(hookedString);
    XCTAssertTrue([string isEqualToString:hookedString]);
}