import { Modifier } from '@src/Modifier';
import { TypeAliasSpec } from '@src/TypeAliasSpec';
import { TypeNames } from '@src/TypeNames';

describe('TypeAliasSpec', () => {
  it('generates JavaDoc at before class definition', () => {
    const testAlias = TypeAliasSpec.create('Integer', TypeNames.NUMBER).addJavadoc('this is a comment\n');
    expect(emit(testAlias)).toMatchInlineSnapshot(`
"/**
 * this is a comment
 */
type Integer = number;
"
`);
  });

  it('generates modifiers in order', () => {
    const testAlias = TypeAliasSpec.create('Integer', TypeNames.NUMBER).addModifiers(Modifier.EXPORT);
    expect(emit(testAlias)).toMatchInlineSnapshot(`
"export type Integer = number;
"
`);
  });

  it('generates simple alias', () => {
    const testAlias = TypeAliasSpec.create('Integer', TypeNames.NUMBER);
    expect(emit(testAlias)).toMatchInlineSnapshot(`
"type Integer = number;
"
`);
  });

  it('generates generic alias', () => {
    const typeVar = TypeNames.typeVariable('A', TypeNames.bound(TypeNames.anyType('Test')));
    const testAlias = TypeAliasSpec.create('StringMap', TypeNames.mapType(TypeNames.STRING, typeVar)).addTypeVariable(
      typeVar
    );
    expect(emit(testAlias)).toMatchInlineSnapshot(`
"type StringMap<A extends Test> = Map<string, A>;
"
`);
  });
});

function emit(spec: TypeAliasSpec): string {
  return spec.toString();
}