No ObservableObject of type User found - xcode

Question

I am trying to understand #EnvironmentObject better so I wrote sample code below to replicate the issue i am facing
This is the class where i declare the array which needs to be accessed in multiple locations and be displayed and updated in ContentView
class User: ObservableObject {
#Published var array = [String]()
func diplayName(name: String){
self.array.append(name)
}
}
I want to be able to append my array in another class. Something like the below code
class myTests: ObservableObject {
#EnvironmentObject var user:User
func diplayMyName(name: String){
self.user.array.append(name)
}
}
When I call displayMyName function in myTests class i get an Error message as below
Fatal error: No ObservableObject of type User found.
A View.environmentObject(_:) for User may be missing as an ancestor of this view.
This is how my contentView looks like
struct ContentView: View {
#EnvironmentObject var user:User
var testing = myTests()
var body: some View {
VStack {
List(user.array, id: \.self){ x in
Text(x)
}
Button(action: {
self.user.diplayName(name: "Name1")
// self.testing.diplayMyName(name: "Name2")
}){
Text("Call Function")
}
}
}
}
This is how i declare my environment object in scene delegate
let contentView = ContentView().environmentObject(User())
I would really appreciate if someone can help me understand why am i getting the error when i append the published array from myTests class. Thank you.
UPDATE
To work around my issue i did the following adjustments
I returned an array in myTests class
class myTests {
var ar = [String]()
func displayMyName() -> [String] {
ar.removeAll()
ar.append(contentsOf: ["Name2", "Name3"])
return ar
}
}
And added it to the array in ContentView
struct ContentView: View {
#EnvironmentObject var user : User
var testing = myTests()
var body: some View {
VStack {
List(user.array, id: \.self){ x in
Text(x)
}
Button(action: {
self.user.array.append(contentsOf: self.testing.displayMyName())
}){
Text("Call Function")
}
}
}
}