tests/cases/compiler/assignmentCompatability21.ts(9,1): error TS2322: Type 'interfaceWithPublicAndOptional<number, string>' is not assignable to type '{ two: string[]; }'.
  Types of property 'two' are incompatible.
    Type 'string' is not assignable to type 'string[]'.
      Property 'push' is missing in type 'String'.


==== tests/cases/compiler/assignmentCompatability21.ts (1 errors) ====
    module __test1__ {
        export interface interfaceWithPublicAndOptional<T,U> { one: T; two?: U; };  var obj4: interfaceWithPublicAndOptional<number,string> = { one: 1 };;
        export var __val__obj4 = obj4;
    }
    module __test2__ {
        export var obj = {two: ["1"]};
        export var __val__obj = obj;
    }
    __test2__.__val__obj = __test1__.__val__obj4
    ~~~~~~~~~~~~~~~~~~~~
!!! error TS2322: Type 'interfaceWithPublicAndOptional<number, string>' is not assignable to type '{ two: string[]; }'.
!!! error TS2322:   Types of property 'two' are incompatible.
!!! error TS2322:     Type 'string' is not assignable to type 'string[]'.
!!! error TS2322:       Property 'push' is missing in type 'String'.