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=== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithObjectMembers5.ts ===
interface Base {
foo: string;
>foo : string
}
interface Derived extends Base {
bar: string;
>bar : string
}
// N and M have the same name, same accessibility, same optionality, and N is a subtype of M
// foo properties are valid, bar properties cause errors in the derived class declarations
module NotOptional {
>NotOptional : typeof NotOptional
interface A {
foo: Base;
>foo : Base
}
class B implements A {
>B : B
fooo: Derived; // error
>fooo : Derived
}
interface A2 {
1: Base;
>1 : Base
}
class B2 implements A2 {
>B2 : B2
2: Derived; // error
>2 : Derived
}
interface A3 {
'1': Base;
>'1' : Base
}
class B3 implements A3 {
>B3 : B3
'1.0': Derived; // error
>'1.0' : Derived
}
}
// same cases as above but with optional
module Optional {
>Optional : typeof Optional
interface A {
foo?: Base;
>foo : Base
}
class B implements A {
>B : B
fooo: Derived; // weak type error
>fooo : Derived
}
interface A2 {
1?: Base;
>1 : Base
}
class B2 implements A2 {
>B2 : B2
2: Derived; // weak type error
>2 : Derived
}
interface A3 {
'1'?: Base;
>'1' : Base
}
class B3 implements A3 {
>B3 : B3
'1.0': Derived; // weak type error
>'1.0' : Derived
}
}
|
