Table test not working on Golang with Receiver Function - unit-testing

Question

I am trying to do some unit testing in Golang. I have this filter structure:
tests/
|_ rcv-func.go
|_ rcv-func_test.go
My rcv-func.go looks like this:
package main
import "fmt"
type Player struct {
health, maxHealth int
energy, maxEnergy int
name string
}
func (p *Player) modifyHealth(newHealth int) {
p.health = newHealth
}
func (p *Player) modifyEnergy(newEnergy int) {
p.energy = newEnergy
}
func main() {
player := Player{
health: 50,
maxHealth: 300,
energy: 20,
maxEnergy: 100,
name: "Jose",
}
fmt.Println("Before resting:", player)
(&player).modifyHealth(150)
(&player).modifyEnergy(100)
fmt.Println("After resting:", player)
}
And my rcv-func_test.go like this:
package main
import (
"fmt"
"testing"
)
var tests = []struct {
health int
energy int
expect int
name string
goal bool
}{
{200, 300, 50, "test1", true},
{100, 300, 0, "test2", true},
}
func TestModifyEnergy(t *testing.T) {
for _, tt := range tests {
(&tt).modifyEnergy(11)
}
}
When I try to test the receiver function .modifyEnergy(), the line (&tt).modifyEnergy(11) is giving me the following error:
(&tt).modifyEnergy undefined (type *struct{health int; energy int; expect int; name string; goal bool} has no field or method modifyEnergy) (exit status 2)
What would be the mistake here? It feels it is not defined but the method is clearly defined in the rcv-func.go file.
I tried making both receiver functions Public but to no avail.
Thank you in advance!