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GameLabSpriteTest.js
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GameLabSpriteTest.js
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/* @file Test of our p5.play Sprite wrapper object */
/* global p5 */
import {expect} from '../../util/configuredChai';
import {
forEveryBooleanPermutation,
sandboxDocumentBody
} from '../../util/testUtils';
import createGameLabP5, {
createStatefulGameLabP5,
expectAnimationsAreClones
} from '../../util/gamelab/TestableGameLabP5';
describe('GameLabSprite', function() {
let gameLabP5, createSprite;
// Using the aggressive sandbox here because the P5 library generates
// a default canvas when it's not attached to an existing one.
sandboxDocumentBody();
beforeEach(function() {
gameLabP5 = createGameLabP5();
createSprite = gameLabP5.p5.createSprite.bind(gameLabP5.p5);
});
describe('property aliases', function() {
let testSprite;
beforeEach(function() {
testSprite = createSprite();
});
it('aliases position.x to positionX', function() {
testSprite.position.x = 1;
expect(testSprite.position.x).to.equal(testSprite.x);
const newValue = 2;
testSprite.x = newValue;
expect(testSprite.position.x)
.to.equal(testSprite.x)
.to.equal(newValue);
});
it('aliases position.y to positionY', function() {
testSprite.position.y = 1;
expect(testSprite.position.y).to.equal(testSprite.y);
const newValue = 2;
testSprite.y = newValue;
expect(testSprite.position.y)
.to.equal(testSprite.y)
.to.equal(newValue);
});
it('aliases velocity.x to velocityX', function() {
testSprite.velocity.x = 1;
expect(testSprite.velocity.x).to.equal(testSprite.velocityX);
const newValue = 2;
testSprite.velocityX = newValue;
expect(testSprite.velocity.x)
.to.equal(testSprite.velocityX)
.to.equal(newValue);
});
it('aliases velocity.y to velocityY', function() {
testSprite.velocity.y = 1;
expect(testSprite.velocity.y).to.equal(testSprite.velocityY);
const newValue = 2;
testSprite.velocityY = newValue;
expect(testSprite.velocity.y)
.to.equal(testSprite.velocityY)
.to.equal(newValue);
});
it('aliases life to lifetime', function() {
testSprite.life = 1;
expect(testSprite.life).to.equal(testSprite.lifetime);
const newValue = 2;
testSprite.lifetime = newValue;
expect(testSprite.life)
.to.equal(testSprite.lifetime)
.to.equal(newValue);
});
it('aliases restitution to bounciness', function() {
testSprite.restitution = 1;
expect(testSprite.restitution).to.equal(testSprite.bounciness);
const newValue = 2;
testSprite.bounciness = newValue;
expect(testSprite.restitution)
.to.equal(testSprite.bounciness)
.to.equal(newValue);
});
});
describe('isTouching', function() {
it('returns false if the collider and colliding sprite dont overlap', function() {
var sprite1 = createSprite(0, 0, 100, 100);
var sprite2 = createSprite(200, 200, 100, 100);
var isTouching1to2 = sprite1.isTouching(sprite2);
var isTouching2to1 = sprite2.isTouching(sprite1);
expect(isTouching1to2)
.to.equal(false)
.and.to.equal(isTouching2to1);
});
it('returns true if the collider and colliding sprite overlap', function() {
var sprite3 = createSprite(150, 150, 100, 100);
var sprite4 = createSprite(200, 200, 100, 100);
var isTouching3to4 = sprite3.isTouching(sprite4);
sprite4.isTouching(sprite3);
expect(isTouching3to4)
.to.equal(true)
.and.to.equal(isTouching3to4);
var sprite5 = createSprite(101, 101, 100, 100);
var sprite6 = createSprite(200, 200, 100, 100);
var isTouching5to6 = sprite5.isTouching(sprite6);
sprite6.isTouching(sprite5);
expect(isTouching5to6)
.to.equal(true)
.and.to.equal(isTouching5to6);
});
it('does not affect the location of the sprite', function() {
var sprite1 = createSprite(170, 170, 100, 100);
var sprite2 = createSprite(200, 200, 100, 100);
var isTouching1to2 = sprite1.isTouching(sprite2);
expect(isTouching1to2).to.equal(true);
expect(sprite1.x).to.equal(170);
expect(sprite1.y).to.equal(170);
expect(sprite2.x).to.equal(200);
expect(sprite2.y).to.equal(200);
});
it('does not affect the velocity of the sprites', function() {
var sprite1 = createSprite(170, 170, 100, 100);
var sprite2 = createSprite(200, 200, 100, 100);
sprite1.velocityX = 1;
sprite1.velocityY = 1;
sprite2.velocityX = 0;
sprite2.velocityY = 0;
var isTouching1to2 = sprite1.isTouching(sprite2);
expect(isTouching1to2).to.equal(true);
expect(sprite1.velocityX).to.equal(1);
expect(sprite1.velocityY).to.equal(1);
expect(sprite2.velocityX).to.equal(0);
expect(sprite2.velocityY).to.equal(0);
});
});
describe('width, height', function() {
describe('sprites without animations', function() {
var sprite1;
beforeEach(function() {
sprite1 = createSprite(200, 200);
});
it('defaults to 100 by 100 when no width or height are set', function() {
expect(sprite1.width).to.equal(100);
expect(sprite1.height).to.equal(100);
});
it('gets and sets the same value', function() {
sprite1.width = 200;
sprite1.height = 450;
expect(sprite1.width).to.equal(200);
expect(sprite1.height).to.equal(450);
});
it('gets unscaled width and height', function() {
sprite1.width = 200;
sprite1.height = 450;
sprite1.scale = 2;
expect(sprite1.width).to.equal(200);
expect(sprite1.height).to.equal(450);
expect(sprite1.scale).to.equal(2);
sprite1.scale = 0.5;
expect(sprite1.width).to.equal(200);
expect(sprite1.height).to.equal(450);
expect(sprite1.scale).to.equal(0.5);
sprite1.width = 100;
expect(sprite1.width).to.equal(100);
});
});
describe('sprites with animations', function() {
var sprite;
beforeEach(function() {
var image = new p5.Image(100, 100, gameLabP5.p5);
var frames = [{name: 0, frame: {x: 0, y: 0, width: 50, height: 50}}];
var sheet = new gameLabP5.p5.SpriteSheet(image, frames);
var animation = new gameLabP5.p5.Animation(sheet);
sprite = createSprite(0, 0);
sprite.addAnimation('label', animation);
});
it('defaults to image height and width when no width or height are set', function() {
expect(sprite.width).to.equal(50);
expect(sprite.height).to.equal(50);
});
it('gets and sets the same value', function() {
sprite.width = 150;
sprite.height = 200;
expect(sprite.width).to.equal(150);
expect(sprite.height).to.equal(200);
});
it('gets unscaled width and height', function() {
sprite.width = 200;
sprite.height = 450;
sprite.scale = 2;
expect(sprite.width).to.equal(200);
expect(sprite.height).to.equal(450);
expect(sprite.scale).to.equal(2);
sprite.scale = 0.5;
expect(sprite.width).to.equal(200);
expect(sprite.height).to.equal(450);
expect(sprite.scale).to.equal(0.5);
sprite.width = 100;
expect(sprite.width).to.equal(100);
});
});
});
describe('getScaledWidth, getScaledHeight', function() {
describe('sprites without animations', function() {
it('returns width and height when no scale is set', function() {
var sprite1 = createSprite(200, 200);
expect(sprite1.getScaledWidth()).to.equal(100);
expect(sprite1.getScaledHeight()).to.equal(100);
sprite1.width = 200;
sprite1.height = 400;
expect(sprite1.getScaledWidth()).to.equal(200);
expect(sprite1.getScaledHeight()).to.equal(400);
});
it('gets scaled values', function() {
var sprite1 = createSprite(200, 200);
sprite1.width = 200;
sprite1.height = 450;
sprite1.scale = 2;
expect(sprite1.getScaledWidth()).to.equal(400);
expect(sprite1.getScaledHeight()).to.equal(900);
expect(sprite1.scale).to.equal(2);
sprite1.scale = 0.5;
expect(sprite1.getScaledWidth()).to.equal(100);
expect(sprite1.getScaledHeight()).to.equal(225);
expect(sprite1.width).to.equal(200);
expect(sprite1.height).to.equal(450);
expect(sprite1.scale).to.equal(0.5);
sprite1.width = 100;
expect(sprite1.getScaledWidth()).to.equal(50);
});
});
describe('sprites with animations', function() {
var sprite1;
beforeEach(function() {
sprite1 = createSprite(0, 0);
sprite1.addAnimation('label', createTestAnimation());
});
it('returns width and height when no scale is set', function() {
expect(sprite1.getScaledWidth()).to.equal(50);
expect(sprite1.getScaledHeight()).to.equal(50);
sprite1.width = 200;
sprite1.height = 400;
expect(sprite1.getScaledWidth()).to.equal(200);
expect(sprite1.getScaledHeight()).to.equal(400);
});
it('gets scaled values', function() {
sprite1.width = 200;
sprite1.height = 450;
sprite1.scale = 2;
expect(sprite1.getScaledWidth()).to.equal(400);
expect(sprite1.getScaledHeight()).to.equal(900);
expect(sprite1.scale).to.equal(2);
sprite1.scale = 0.5;
expect(sprite1.getScaledWidth()).to.equal(100);
expect(sprite1.getScaledHeight()).to.equal(225);
expect(sprite1.width).to.equal(200);
expect(sprite1.height).to.equal(450);
expect(sprite1.scale).to.equal(0.5);
sprite1.width = 100;
expect(sprite1.getScaledWidth()).to.equal(50);
});
it('gets scaled values regardless of colliders', function() {
var sprite2 = createSprite(0, 0);
sprite2.addAnimation('label', createTestAnimation());
sprite1.width = 200;
sprite1.height = 400;
sprite1.scale = 2;
expect(sprite1.getScaledWidth()).to.equal(400);
expect(sprite1.getScaledHeight()).to.equal(800);
sprite1.collide(sprite2);
expect(sprite1.getScaledWidth()).to.equal(400);
expect(sprite1.getScaledHeight()).to.equal(800);
});
});
});
describe('setAnimation(label)', function() {
const ANIMATION_LABEL = 'animation1',
SECOND_ANIMATION_LABEL = 'animation2';
let sprite, projectAnimations;
beforeEach(function() {
sprite = createSprite(0, 0);
// We manually preload animations onto p5._predefinedSpriteAnimations for the use of
// setAnimation.
projectAnimations = {
[ANIMATION_LABEL]: createTestAnimation(8),
[SECOND_ANIMATION_LABEL]: createTestAnimation(10)
};
gameLabP5.p5._predefinedSpriteAnimations = projectAnimations;
});
it('throws if the named animation is not found in the project', function() {
expect(() => {
sprite.setAnimation('fakeAnimation');
}).to.throw(
`Unable to find an animation named "fakeAnimation". Please make sure the animation exists.`
);
});
it('makes the named animaiton the current animation, if the animation is found', function() {
sprite.setAnimation(ANIMATION_LABEL);
// Current animation label should be animation label
expect(sprite.getAnimationLabel()).to.equal(ANIMATION_LABEL);
// Current animation will be a clone of the project animation:
expectAnimationsAreClones(
sprite.animation,
projectAnimations[ANIMATION_LABEL]
);
});
it('changes the animation to first frame and plays it by default', function() {
sprite.setAnimation(ANIMATION_LABEL);
// Animation is at frame 1
expect(sprite.animation.getFrame()).to.equal(0);
// Animation is playing
expect(sprite.animation.playing).to.be.true;
});
describe('repeat call', function() {
beforeEach(function() {
// Set first animation and advance a few frames, to simulate an
// animation in the middle of playback.
sprite.setAnimation(ANIMATION_LABEL);
sprite.animation.changeFrame(3);
});
it('resets the current frame if called with a new animation', function() {
expect(sprite.getAnimationLabel()).to.equal(ANIMATION_LABEL);
expect(sprite.animation.getFrame()).to.equal(3);
sprite.setAnimation(SECOND_ANIMATION_LABEL);
expect(sprite.getAnimationLabel()).to.equal(SECOND_ANIMATION_LABEL);
expect(sprite.animation.getFrame()).to.equal(0);
});
it('does not reset the current frame if called with the current animation', function() {
expect(sprite.getAnimationLabel()).to.equal(ANIMATION_LABEL);
expect(sprite.animation.getFrame()).to.equal(3);
sprite.setAnimation(ANIMATION_LABEL);
expect(sprite.getAnimationLabel()).to.equal(ANIMATION_LABEL);
expect(sprite.animation.getFrame()).to.equal(3);
});
it('unpasuses a paused sprite if called with a new animation', function() {
sprite.pause();
expect(sprite.getAnimationLabel()).to.equal(ANIMATION_LABEL);
expect(sprite.animation.playing).to.be.false;
sprite.setAnimation(SECOND_ANIMATION_LABEL);
expect(sprite.getAnimationLabel()).to.equal(SECOND_ANIMATION_LABEL);
expect(sprite.animation.playing).to.be.true;
});
it('does not unpause a paused sprite if called with the current animation', function() {
expect(sprite.animation.playing).to.be.true;
sprite.pause();
expect(sprite.getAnimationLabel()).to.equal(ANIMATION_LABEL);
expect(sprite.animation.playing).to.be.false;
sprite.setAnimation(ANIMATION_LABEL);
expect(sprite.getAnimationLabel()).to.equal(ANIMATION_LABEL);
expect(sprite.animation.playing).to.be.false;
});
// Applies to both cases, so unify them
forEveryBooleanPermutation(same => {
const description = `called with ${
same ? 'the current' : 'a new'
} animation`;
const label = same ? ANIMATION_LABEL : SECOND_ANIMATION_LABEL;
it(`does not pause a playing sprite if ${description}`, function() {
expect(sprite.getAnimationLabel()).to.equal(ANIMATION_LABEL);
expect(sprite.animation.playing).to.be.true;
sprite.setAnimation(label);
expect(sprite.getAnimationLabel()).to.equal(label);
expect(sprite.animation.playing).to.be.true;
});
});
});
});
describe('play()', function() {
// Plays/resumes the sprite's current animation.
// If the animation is currently playing, this has no effect.
// If the animation is stopped at the last frame, this will restart the
// animation from the beginning.
// If the animation is stopped at any other frame, this will resume playing
// the animation at that frame.
const LOOPING_ANIMATION = 'looping-animation',
NON_LOOPING_ANIMATION = 'non-looping-animation';
let sprite;
beforeEach(function() {
sprite = createSprite(0, 0);
// Manually preload animations onto p5._predefinedSpriteAnimations
gameLabP5.p5._predefinedSpriteAnimations = {
[LOOPING_ANIMATION]: createTestAnimation(3, true),
[NON_LOOPING_ANIMATION]: createTestAnimation(3, false)
};
});
it('has no effect on a playing, looping animation', function() {
sprite.setAnimation(LOOPING_ANIMATION);
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(0);
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(0);
sprite.update(); // The test animation frameDelay=1, so this advances a frame.
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(1);
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(1);
sprite.update();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(2);
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(2);
sprite.update();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(0);
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(0);
});
it('has no effect on a playing, non-looping animation until it reaches the final frame', function() {
sprite.setAnimation(NON_LOOPING_ANIMATION);
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(0);
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(0);
sprite.update(); // The test animation frameDelay=1, so this advances a frame.
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(1);
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(1);
sprite.update();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(2);
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(2);
// No more frames to play for a non-looping animation
sprite.update();
expect(sprite.animation.playing).to.be.false;
expect(sprite.animation.getFrame()).to.equal(2);
// Restart the animation
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(0);
sprite.update();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(1);
});
it('resumes a stopped, looping animation at the current frame', function() {
sprite.setAnimation(LOOPING_ANIMATION);
for (var i = 0; i < 3; i++) {
sprite.animation.changeFrame(i);
sprite.pause();
expect(sprite.animation.playing).to.be.false;
expect(sprite.animation.getFrame()).to.equal(i);
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(i);
}
});
it('resumes a stopped, non-looping animation at the current frame if at a nonterminal frame', function() {
sprite.setAnimation(NON_LOOPING_ANIMATION);
for (var i = 0; i < 2; i++) {
sprite.animation.changeFrame(i);
sprite.pause();
expect(sprite.animation.playing).to.be.false;
expect(sprite.animation.getFrame()).to.equal(i);
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(i);
}
});
it('resumes a stopped, non-looping animation at the first frame if at the terminal frame', function() {
sprite.setAnimation(NON_LOOPING_ANIMATION);
sprite.animation.changeFrame(2);
sprite.pause();
expect(sprite.animation.playing).to.be.false;
expect(sprite.animation.getFrame()).to.equal(2);
sprite.play();
expect(sprite.animation.playing).to.be.true;
expect(sprite.animation.getFrame()).to.equal(0);
});
});
describe('collision types using AABBOps', function() {
let sprite, spriteTarget;
beforeEach(function() {
// sprite in to the left, moving right
// spriteTarget in to the right, stationary
sprite = createSprite(281, 100, 20, 20);
spriteTarget = createSprite(300, 100, 20, 20);
sprite.velocity.x = 3;
spriteTarget.velocity.x = 0;
expect(sprite.velocity.x).to.equal(3);
expect(spriteTarget.velocity.x).to.equal(0);
});
it('stops movement of colliding sprite when sprites bounce', function() {
// sprite stops moving, spriteTarget moves right
const bounce = sprite.bounce(spriteTarget);
expect(bounce).to.equal(true);
expect(sprite.position.x).to.equal(280); // move back to not overlap with spriteTarget
expect(spriteTarget.position.x).to.equal(300);
expect(sprite.velocity.x).to.equal(0);
expect(spriteTarget.velocity.x).to.equal(3);
sprite.update();
spriteTarget.update();
expect(sprite.position.x).to.equal(280);
expect(spriteTarget.position.x).to.equal(303);
expect(sprite.velocity.x).to.equal(0);
expect(spriteTarget.velocity.x).to.equal(3);
sprite.bounce(spriteTarget);
expect(sprite.position.x).to.equal(280);
expect(spriteTarget.position.x).to.equal(303);
expect(sprite.velocity.x).to.equal(0);
expect(spriteTarget.velocity.x).to.equal(3);
});
it('stops movement of colliding sprite when sprites collide', function() {
// sprite stops moving, spriteTarget stops moving
const collide = sprite.collide(spriteTarget);
expect(collide).to.equal(true);
expect(sprite.position.x).to.equal(280);
expect(spriteTarget.position.x).to.equal(300);
expect(sprite.velocity.x).to.equal(0);
expect(spriteTarget.velocity.x).to.equal(0);
});
it('continues movement of colliding sprite when sprites displace', function() {
// sprite continues moving, spriteTarget gets pushed by sprite
const displace = sprite.displace(spriteTarget);
expect(displace).to.equal(true);
expect(sprite.position.x).to.equal(281);
expect(spriteTarget.position.x).to.equal(301);
expect(sprite.velocity.x).to.equal(3);
expect(spriteTarget.velocity.x).to.equal(0);
sprite.update();
spriteTarget.update();
expect(sprite.position.x).to.equal(284);
expect(spriteTarget.position.x).to.equal(301);
expect(sprite.velocity.x).to.equal(3);
expect(spriteTarget.velocity.x).to.equal(0);
// Displace is true again, since sprite keeps moving into spriteTarget
const displace2 = sprite.displace(spriteTarget);
expect(displace2).to.be.true;
});
it('reverses direction of colliding sprite when sprites bounceOff', function() {
// sprite reverses direction of movement, spriteTarget remains in its location
const bounceOff = sprite.bounceOff(spriteTarget);
expect(bounceOff).to.equal(true);
expect(sprite.position.x).to.equal(280);
expect(spriteTarget.position.x).to.equal(300);
expect(sprite.velocity.x).to.equal(-3);
expect(spriteTarget.velocity.x).to.equal(0);
sprite.update();
spriteTarget.update();
expect(bounceOff).to.equal(true);
expect(sprite.position.x).to.equal(277);
expect(spriteTarget.position.x).to.equal(300);
expect(sprite.velocity.x).to.equal(-3);
expect(spriteTarget.velocity.x).to.equal(0);
sprite.bounceOff(spriteTarget);
expect(bounceOff).to.equal(true);
expect(sprite.position.x).to.equal(277);
expect(spriteTarget.position.x).to.equal(300);
expect(sprite.velocity.x).to.equal(-3);
expect(spriteTarget.velocity.x).to.equal(0);
});
it('continues movement of colliding sprite when sprites overlap', function() {
// sprite continues moving, spriteTarget remains in it's location
const overlap = sprite.overlap(spriteTarget);
expect(overlap).to.equal(true);
expect(sprite.position.x).to.equal(281);
expect(spriteTarget.position.x).to.equal(300);
expect(sprite.velocity.x).to.equal(3);
expect(spriteTarget.velocity.x).to.equal(0);
sprite.update();
spriteTarget.update();
expect(overlap).to.equal(true);
expect(sprite.position.x).to.equal(284);
expect(spriteTarget.position.x).to.equal(300);
expect(sprite.velocity.x).to.equal(3);
expect(spriteTarget.velocity.x).to.equal(0);
sprite.overlap(spriteTarget);
expect(overlap).to.equal(true);
expect(sprite.position.x).to.equal(284);
expect(spriteTarget.position.x).to.equal(300);
expect(sprite.velocity.x).to.equal(3);
expect(spriteTarget.velocity.x).to.equal(0);
});
it('destroyed sprites do not collide', function() {
expect(sprite.overlap(spriteTarget)).to.equal(true);
spriteTarget.remove();
expect(sprite.overlap(spriteTarget)).to.equal(false);
expect(spriteTarget.overlap(sprite)).to.equal(false);
});
});
describe('collisions with groups', function() {
let sprite, spriteTarget1, spriteTarget2, group;
let gameLabP5Stateful, createStatefulGroup, createStatefulSprite;
beforeEach(function() {
gameLabP5Stateful = createStatefulGameLabP5();
createStatefulGroup = gameLabP5Stateful.p5.createGroup.bind(
gameLabP5Stateful.p5
);
createStatefulSprite = gameLabP5Stateful.p5.createSprite.bind(
gameLabP5Stateful.p5
);
spriteTarget1 = createStatefulSprite(0, 0, 100, 100);
spriteTarget2 = createStatefulSprite(400, 400, 100, 100);
sprite = createStatefulSprite(200, 200, 100, 100);
group = createStatefulGroup();
group.add(spriteTarget1);
group.add(spriteTarget2);
});
it('isTouching returns false when sprite touches nothing in the group', function() {
let result;
for (let i = 0; i < group.length + 1; i++) {
result = sprite.isTouching(group);
}
expect(result).to.equal(false);
});
it('isTouching returns true when sprite touches anything in the group', function() {
spriteTarget1.x = sprite.x;
spriteTarget1.y = sprite.y;
let result2;
for (let i = 0; i < group.length + 1; i++) {
result2 = sprite.isTouching(group);
}
expect(result2).to.equal(true);
});
it('collide returns false when sprite touches nothing in the group', function() {
let result;
for (let i = 0; i < group.length + 1; i++) {
result = sprite.collide(group);
}
expect(result).to.equal(false);
});
it('collide returns true when sprite touches anything in the group', function() {
spriteTarget1.x = sprite.x;
spriteTarget1.y = sprite.y;
let result2;
for (let i = 0; i < group.length + 1; i++) {
result2 = sprite.collide(group);
}
expect(result2).to.equal(true);
});
it('bounce returns false when sprite touches nothing in the group', function() {
let result;
for (let i = 0; i < group.length + 1; i++) {
result = sprite.bounce(group);
}
expect(result).to.equal(false);
});
it('bounce returns true when sprite touches anything in the group', function() {
spriteTarget1.x = sprite.x;
spriteTarget1.y = sprite.y;
let result2;
for (let i = 0; i < group.length + 1; i++) {
result2 = sprite.bounce(group);
}
expect(result2).to.equal(true);
});
it('bounceOff returns false when sprite touches nothing in the group', function() {
let result;
for (let i = 0; i < group.length + 1; i++) {
result = sprite.bounceOff(group);
}
expect(result).to.equal(false);
});
it('bounceOff returns true when sprite touches anything in the group', function() {
spriteTarget1.x = sprite.x;
spriteTarget1.y = sprite.y;
let result2;
for (let i = 0; i < group.length + 1; i++) {
result2 = sprite.bounceOff(group);
}
expect(result2).to.equal(true);
});
it('displace returns false when sprite touches nothing in the group', function() {
let result;
for (let i = 0; i < group.length + 1; i++) {
result = sprite.displace(group);
}
expect(result).to.equal(false);
});
it('displace returns true when sprite touches anything in the group', function() {
spriteTarget1.x = sprite.x;
spriteTarget1.y = sprite.y;
let result2;
for (let i = 0; i < group.length + 1; i++) {
result2 = sprite.displace(group);
}
expect(result2).to.equal(true);
});
it('overlap returns false when sprite touches nothing in the group', function() {
let result;
for (let i = 0; i < group.length + 1; i++) {
result = sprite.overlap(group);
}
expect(result).to.equal(false);
});
it('overlap returns true when sprite touches anything in the group', function() {
spriteTarget1.x = sprite.x;
spriteTarget1.y = sprite.y;
let result2;
for (let i = 0; i < group.length + 1; i++) {
result2 = sprite.overlap(group);
}
expect(result2).to.equal(true);
});
});
describe('sprite.collide(sprite)', function() {
var SIZE = 10;
var pInst;
var spriteA, spriteB;
var callCount, pairs;
function testCallback(a, b) {
callCount++;
pairs.push([a.name, b.name]);
}
function moveAToB(a, b) {
a.position.x = b.position.x;
}
beforeEach(function() {
pInst = new p5(function() {});
callCount = 0;
pairs = [];
function createTestSprite(letter, position) {
var sprite = pInst.createSprite(position, 0, SIZE, SIZE);
sprite.name = 'sprite' + letter;
return sprite;
}
spriteA = createTestSprite('A', 2 * SIZE);
spriteB = createTestSprite('B', 4 * SIZE);
// Assert initial test state:
// - Two total sprites
// - no two sprites overlap
expect(pInst.allSprites.length).to.equal(2);
pInst.allSprites.forEach(function(caller) {
pInst.allSprites.forEach(function(callee) {
expect(caller.overlap(callee)).to.be.false;
});
});
});
afterEach(function() {
pInst.remove();
});
it('false if sprites do not overlap', function() {
expect(spriteA.collide(spriteB)).to.be.false;
expect(spriteB.collide(spriteA)).to.be.false;
});
it('true if sprites overlap', function() {
moveAToB(spriteA, spriteB);
expect(spriteA.collide(spriteB)).to.be.true;
moveAToB(spriteA, spriteB);
expect(spriteB.collide(spriteA)).to.be.true;
});
it('calls callback once if sprites overlap', function() {
expect(callCount).to.equal(0);
moveAToB(spriteA, spriteB);
spriteA.collide(spriteB, testCallback);
expect(callCount).to.equal(1);
moveAToB(spriteA, spriteB);
spriteB.collide(spriteA, testCallback);
expect(callCount).to.equal(2);
});
it('does not call callback if sprites do not overlap', function() {
expect(callCount).to.equal(0);
spriteA.collide(spriteB, testCallback);
expect(callCount).to.equal(0);
spriteB.collide(spriteA, testCallback);
expect(callCount).to.equal(0);
});
describe('passes collider and collidee to callback', function() {
it('A-B', function() {
moveAToB(spriteA, spriteB);
spriteA.collide(spriteB, testCallback);
expect(pairs).to.deep.equal([[spriteA.name, spriteB.name]]);
});
it('B-A', function() {
moveAToB(spriteA, spriteB);
spriteB.collide(spriteA, testCallback);
expect(pairs).to.deep.equal([[spriteB.name, spriteA.name]]);
});
});
it('does not reposition either sprite when sprites do not overlap', function() {
var initialPositionA = spriteA.position.copy();
var initialPositionB = spriteB.position.copy();
spriteA.collide(spriteB);
expectVectorsAreClose(spriteA.position, initialPositionA);
expectVectorsAreClose(spriteB.position, initialPositionB);
spriteB.collide(spriteA);
expectVectorsAreClose(spriteA.position, initialPositionA);
expectVectorsAreClose(spriteB.position, initialPositionB);
});
describe('displaces the caller out of collision when sprites do overlap', function() {
it('to the left', function() {
spriteA.position.x = spriteB.position.x - 1;
var expectedPositionA = spriteB.position.copy().add(-SIZE, 0);
var expectedPositionB = spriteB.position.copy();
spriteA.collide(spriteB);
expectVectorsAreClose(spriteA.position, expectedPositionA);
expectVectorsAreClose(spriteB.position, expectedPositionB);
});
it('to the right', function() {
spriteA.position.x = spriteB.position.x + 1;
var expectedPositionA = spriteB.position.copy().add(SIZE, 0);
var expectedPositionB = spriteB.position.copy();
spriteA.collide(spriteB);
expectVectorsAreClose(spriteA.position, expectedPositionA);
expectVectorsAreClose(spriteB.position, expectedPositionB);
});
it('caller and callee reversed', function() {
spriteA.position.x = spriteB.position.x + 1;
var expectedPositionA = spriteA.position.copy();
var expectedPositionB = spriteA.position.copy().add(-SIZE, 0);
spriteB.collide(spriteA);
expectVectorsAreClose(spriteA.position, expectedPositionA);
expectVectorsAreClose(spriteB.position, expectedPositionB);
});
});
it('does not change velocity of either sprite when sprites do not overlap', function() {
var initialVelocityA = spriteA.velocity.copy();
var initialVelocityB = spriteB.velocity.copy();
spriteA.collide(spriteB);
expectVectorsAreClose(spriteA.velocity, initialVelocityA);
expectVectorsAreClose(spriteB.velocity, initialVelocityB);
spriteB.collide(spriteA);
expectVectorsAreClose(spriteA.velocity, initialVelocityA);
expectVectorsAreClose(spriteB.velocity, initialVelocityB);
});
describe('matches caller velocity to callee velocity when sprites do overlap', function() {
it('when callee velocity is zero', function() {
spriteA.position.x = spriteB.position.x - 1;
spriteA.velocity.x = 2;
spriteB.velocity.x = 0;