The Solution I used for now is to inject the inforDictionary to my sut in the constructor
- (void)testAppPackageName
{
//fixture
NSDictionary* appInfo = @{ @"CFBundleIdentifier" : BUNDLE_IDENTIFIER};
sut = [[SomeClass alloc] initWithInfo:appInfo];
XCTAssertEqualObjects(sut.bundleIdentifier, BUNDLE_IDENTIFIER);
}