mocking IUserPasswordStore

I have ChangePassword method where I have UserManager.ChangePasswordAsync(userId, oldPassword, newPassword); to change password'.

Problem: Above line gives the following error.

System.NotSupportedException: Store does not implement IUserPasswordStore.

ChangePassword method line of code

IdentityResult result = await UserManager.ChangePasswordAsync(userId, oldPassword, newPassword);

Unit Test

var mock = new Mock<MyController>();
mock.CallBase = true;
var obj = mock.Object;

obj.ControllerContext = new HttpControllerContext { Request = new HttpRequestMessage() };
obj.Request.SetOwinContext(CommonCodeHelper.mockOwinContext());

IPrincipal user = GetPrincipal();
obj.ControllerContext.RequestContext.Principal = user;
var result = await obj.ChangePassword(dto);

IOwinContext mocking code

public static IOwinContext mockOwinContext()
{
    var owinMock = new Mock<IOwinContext>();
    owinMock.Setup(o => o.Authentication.User).Returns(new ClaimsPrincipal());
    owinMock.Setup(o => o.Request).Returns(new Mock<OwinRequest>().Object);
    owinMock.Setup(o => o.Response).Returns(new Mock<OwinResponse>().Object);
    owinMock.Setup(o => o.Environment).Returns(new Dictionary<string, object> { { "key1", 123 } });
    var traceMock = new Mock<TextWriter>();
    owinMock.Setup(o => o.TraceOutput).Returns(traceMock.Object);

    var userStoreMock = new Mock<IUserStore<IfsUser>>();
    userStoreMock.Setup(s => s.FindByIdAsync("User1@ifstoolsuite.com")).ReturnsAsync(new ApplicationUser
    {
        Id = "User1@test.com",
        FirstName = "Test",
        LastName = "User1",
        Email = "User1@test.com",
        UserName = "User1@test.com",
    });
    var appManager = new ApplicationUserManager(userStoreMock.Object);
    owinMock.Setup(o => o.Get<ApplicationUserManager>(It.IsAny<string>())).Returns(appManager );
    return owinMock.Object;
}

After getting above error, i tried to mock IUserPassword inside IOwinContext code block (above method) using following line of code

var passwordManager = userStoreMock.As<IUserPasswordStore<ApplicationUser>>();

I think the above mocking code for IUserPassword isn't correct becuase now it gives exception

System.InvalidOperationException: UserId not found.

Any help how do i mock IUserPasswordStore<TUser>?