ui/src/base/geom_unittest.ts

// Copyright (C) 2024 The Android Open Source Project
//
// 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 {Vector2D, Rect2D, Bounds2D} from './geom';

describe('Vector2D', () => {
  test('add', () => {
    const vector1 = new Vector2D({x: 1, y: 2});
    const vector2 = new Vector2D({x: 3, y: 4});
    const result = vector1.add(vector2);
    expect(result.x).toBe(4);
    expect(result.y).toBe(6);
  });

  test('sub', () => {
    const vector1 = new Vector2D({x: 5, y: 7});
    const vector2 = new Vector2D({x: 2, y: 3});
    const result = vector1.sub(vector2);
    expect(result.x).toBe(3);
    expect(result.y).toBe(4);
  });

  test('scale', () => {
    const vector = new Vector2D({x: 2, y: 3});
    const result = vector.scale(2);
    expect(result.x).toBe(4);
    expect(result.y).toBe(6);
  });
});

describe('Rect2D', () => {
  test('intersect', () => {
    const a = new Rect2D({left: 1, top: 1, right: 4, bottom: 4});
    const b = {left: 2, top: 2, right: 5, bottom: 5};
    const result = a.intersect(b);
    expect(result).toMatchObject({left: 2, top: 2, right: 4, bottom: 4});
    // Note: Non-overlapping rects are UB and thus not tested
    // TODO(stevegolton): Work out what to do here.
  });

  test('expand', () => {
    const rect = new Rect2D({left: 1, top: 1, right: 3, bottom: 3});
    const result = rect.expand(1);
    expect(result).toMatchObject({left: 0, top: 0, right: 4, bottom: 4});
  });

  test('reframe', () => {
    const rect = new Rect2D({left: 2, top: 2, right: 5, bottom: 5});
    const result = rect.reframe({x: 1, y: 1});
    expect(result).toMatchObject({left: 1, top: 1, right: 4, bottom: 4});
  });

  test('size', () => {
    const rect = new Rect2D({left: 1, top: 1, right: 4, bottom: 3});
    expect(rect).toMatchObject({width: 3, height: 2});
  });

  it('translate', () => {
    const rect = new Rect2D({left: 2, top: 2, right: 5, bottom: 5});
    const result = rect.translate({x: 3, y: 4});
    expect(result).toMatchObject({left: 5, top: 6, right: 8, bottom: 9});
  });

  it('contains', () => {
    const outerRect = new Rect2D({left: 0, top: 0, right: 10, bottom: 10});
    const innerRect: Bounds2D = {left: 2, top: 2, right: 8, bottom: 8};
    expect(outerRect.contains(innerRect)).toBe(true);

    const nonContainedRect: Bounds2D = {left: 2, top: 2, right: 12, bottom: 8};
    expect(outerRect.contains(nonContainedRect)).toBe(false);
  });
});