copy constructor vs copy assingment operator

#include<iostream>
using namespace std;

class Test
{
public:
Test() {}
Test(const Test &t)
{
cout<<"Copy constructor called "<<endl;
}

Test& operator = (const Test &t)
{
cout<<"Assignment operator called "<<endl;
return *this;
}
};

// Driver code
int main()
{
Test t1, t2;
t2 = t1;
Test t3 = t1;
return 0;
}