/**

* @license

* Copyright 2018 Google LLC. All Rights Reserved.

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

* =============================================================================

*/

import {upcastType} from './types';

describe('upcastType', () => {

it('upcasts bool to bool', () => {

expect(upcastType('bool', 'bool')).toBe('bool');

});

it('upcasts bool/int32 to int32', () => {

expect(upcastType('bool', 'int32')).toBe('int32');

expect(upcastType('int32', 'int32')).toBe('int32');

});

it('upcasts bool/int32/float32 to float32', () => {

expect(upcastType('bool', 'float32')).toBe('float32');

expect(upcastType('int32', 'float32')).toBe('float32');

expect(upcastType('float32', 'float32')).toBe('float32');

});

it('upcasts bool/int32/float32/complex64 to complex64', () => {

expect(upcastType('bool', 'complex64')).toBe('complex64');

expect(upcastType('int32', 'complex64')).toBe('complex64');

expect(upcastType('float32', 'complex64')).toBe('complex64');

expect(upcastType('complex64', 'complex64')).toBe('complex64');

});

it('fails to upcast anything other than string with string', () => {

expect(() => upcastType('bool', 'string')).toThrowError();

expect(() => upcastType('int32', 'string')).toThrowError();

expect(() => upcastType('float32', 'string')).toThrowError();

expect(() => upcastType('complex64', 'string')).toThrowError();

// Ok upcasting string to string.

expect(upcastType('string', 'string')).toBe('string');

});

});