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layout.spec.ts
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layout.spec.ts
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/* eslint-disable @typescript-eslint/no-explicit-any, @typescript-eslint/no-unsafe-return, @typescript-eslint/no-unsafe-call, @typescript-eslint/no-unsafe-member-access */
import { expect, getLayoutFixture, detectMisalignment } from '../src';
describe('Layout matchers', function () {
describe('detect placement', function () {
it('with .insideOf() and .outsideOf()', function () {
const { a, b, c, x } = getLayoutFixture(`
x--------------------x
| | c--c
| a-----a | | |
| | | b--|--b c--c
| | | | | |
| a-----a | | |
| b--|--b
| |
| |
x--------------------x
`);
expect(a).to.be.insideOf(x);
expect(a).not.to.be.outsideOf(x);
expect(() => expect(a).to.be.outsideOf(x)).to.throw(
"Expected element to be outside of the other, but it wasn't.",
);
expect(() => expect(a).not.to.be.insideOf(x)).to.throw(
'Expected element not to be inside of the other, but it was.',
);
expect(b).not.to.be.insideOf(x);
expect(b).not.to.be.outsideOf(x);
expect(c).to.be.outsideOf(x);
expect(c).not.to.be.insideOf(x);
expect(() => expect(c).to.be.insideOf(x)).to.throw(
"Expected element to be inside of the other, but it wasn't.",
);
expect(() => expect(c).not.to.be.outsideOf(x)).to.throw(
'Expected element not to be outside of the other, but it was.',
);
});
});
describe('measure box properties', function () {
let a: Element, b: Element, c: Element;
before(function () {
({ a, b, c } = getLayoutFixture(`
b----b c---------c
| | | |
| | | |
| | | |
a-------------a | | | |
| | | | | |
a-------------a b----b c---------c
`));
});
function assertBoxProp(element: Element, propName: string, correctValue: number, incorrectValue: number) {
(expect(element).to.have as any)[propName].equal(correctValue);
(expect(element).not.to.have as any)[propName].equal(incorrectValue);
expect(() => (expect(element).to.have as any)[propName].equal(incorrectValue)).to.throw(
`expected ${correctValue} to equal ${incorrectValue}`,
);
expect(() => (expect(element).not.to.have as any)[propName].equal(correctValue)).to.throw(
`expected ${correctValue} to not equal ${correctValue}`,
);
}
it('asserting width', function () {
assertBoxProp(a, 'width', 15, 14);
});
it('asserting height', function () {
assertBoxProp(a, 'height', 3, 4);
});
it('asserting left', function () {
assertBoxProp(a, 'left', 9, 15);
});
it('asserting right', function () {
assertBoxProp(a, 'right', 24, 30);
});
it('asserting top', function () {
assertBoxProp(b, 'top', 2, 10);
});
it('asserting bottom', function () {
assertBoxProp(b, 'bottom', 9, 10);
});
it('comparing them', function () {
expect(a).to.have.width.greaterThan(10);
expect(a).to.have.width.greaterThan(b);
expect(a).not.to.have.width.lessThan(b);
expect(a).to.have.height.lessThan(5);
expect(a).not.to.have.height.greaterThan(5);
expect(() => expect(a).to.have.height.greaterThan(5)).to.throw(`expected 3 to be above 5`);
expect(a).to.have.height.lessThan(b);
expect(b).to.have.height.at.least(7);
expect(() => expect(b).not.to.have.height.at.least(7)).to.throw(`expected 7 to be below 7`);
expect(b).to.have.height.at.least(c);
expect(b).to.have.height.at.most(c);
expect(b).to.be.with.left.above(a);
expect(() => expect(b).to.be.with.left.above(700)).to.throw(`expected 28 to be above 700`);
expect(b).to.be.with.right.below(c);
});
});
describe('detects alignment', function () {
describe('detectMisalignment() returns indices of misaligned items', function () {
it('for integer edges (some misaligned)', function () {
expect(detectMisalignment([5, 5, 7, 5, 2])).to.eql([2, 4]);
});
it('integer edges (all aligned)', function () {
expect(detectMisalignment([5, 5, 5, 5, 5])).to.eql([]);
});
it('integer edges (all wildly dispersed, the 1st one considered baseline', function () {
expect(detectMisalignment([5, 7, 3, 1, 4])).to.eql([1, 2, 3, 4]);
});
it('real edges (some misaligned)', function () {
expect(detectMisalignment([5.2, 5.2, 7.3, 5.2, 2.4])).to.eql([2, 4]);
});
it('real edges with tolerance value (some misaligned)', function () {
expect(detectMisalignment([5.2, 4.9, 7.3, 5.4, 2.4], 0.5)).to.eql([2, 4]);
});
});
it('will throw an error when input list of elements is of length zero or one', () => {
const { a } = getLayoutFixture(`
a---a
| |
| |
| |
a---a
`);
const verticalAlignments: VerticalAlignment[] = ['top', 'bottom', 'center'];
const horizontalAlignments: HorizontalAlignment[] = ['left', 'right', 'center'];
verticalAlignments.forEach((alignment) => {
expect(() => expect([]).to.be.verticallyAligned(alignment)).to.throw(
`Expected elements to be vertically aligned to "${alignment}" but element list was empty`,
);
expect(() => expect([a]).to.be.verticallyAligned(alignment)).to.throw(
`Expected elements to be vertically aligned to "${alignment}" but element list had only one element`,
);
});
horizontalAlignments.forEach((alignment) => {
expect(() => expect([]).to.be.horizontallyAligned(alignment)).to.throw(
`Expected elements to be horizontally aligned to "${alignment}" but element list was empty`,
);
expect(() => expect([a]).to.be.horizontallyAligned(alignment)).to.throw(
`Expected elements to be horizontally aligned to "${alignment}" but element list had only one element`,
);
});
});
it('(vertical top)', function () {
const { a, b, c, d } = getLayoutFixture(`
----a---a------b---b------d----d---------
| | | | | |
| | b---b c--c | |
| | | | d----d
a---a | |
c--c
`);
expect([a, b, d]).to.be.verticallyAligned('top');
expect([a, b, c, d]).not.to.be.verticallyAligned('top');
expect([a, b, c, d]).to.be.verticallyAligned('top', 2.0);
expect(() => expect([a, b, c, d]).to.be.verticallyAligned('top')).to.throw(
'Expected elements to be vertically aligned to "top" but some weren\'t. ([2])',
);
expect(() => expect([a, b, d]).not.to.be.verticallyAligned('top')).to.throw(
'Expected elements not to be vertically aligned to "top" but they were.',
);
});
it('(vertical center)', function () {
const { a, b, c, d } = getLayoutFixture(`
a---a c--c
| | | |d----d
| | b---b c--c| |
----| |------| |------| |---------
| | b---b | |
| | d----d
a---a
`);
expect([a, b, d]).to.be.verticallyAligned('center');
expect([a, b, c, d]).not.to.be.verticallyAligned('center');
expect([a, b, c, d]).to.be.verticallyAligned('center', 2.0);
expect(() => expect([a, b, c, d]).to.be.verticallyAligned('center')).to.throw(
'Expected elements to be vertically aligned to "center" but some weren\'t. ([2])',
);
expect(() => expect([a, b, d]).not.to.be.verticallyAligned('center')).to.throw(
'Expected elements not to be vertically aligned to "center" but they were.',
);
});
it('(vertical bottom)', function () {
const { a, b, c, d } = getLayoutFixture(`
d----d
a---a c--c| |
| | b---b | || |
| | | | c--c| |
----a---a------b---b------d----d---------
`);
expect([a, b, d]).to.be.verticallyAligned('bottom');
expect([a, b, c, d]).not.to.be.verticallyAligned('bottom');
expect([a, b, c, d]).to.be.verticallyAligned('bottom', 1.0);
expect(() => expect([a, b, c, d]).to.be.verticallyAligned('bottom')).to.throw(
'Expected elements to be vertically aligned to "bottom" but some weren\'t. ([2])',
);
expect(() => expect([a, b, d]).not.to.be.verticallyAligned('bottom')).to.throw(
'Expected elements not to be vertically aligned to "bottom" but they were.',
);
});
it('(horizontal left)', function () {
const { a, b, c, d } = getLayoutFixture(`
|
a---------a
| |
a---------a
|
b-----b
b-----b
|
| c----------c
| | |
| c----------c
d----d
d----d
|
|
`);
expect([a, b, d]).to.be.horizontallyAligned('left');
expect([a, b, c, d]).not.to.be.horizontallyAligned('left');
expect([a, b, c, d]).to.be.horizontallyAligned('left', 4.0);
expect(() => expect([a, b, c, d]).to.be.horizontallyAligned('left')).to.throw(
'Expected elements to be horizontally aligned to "left" but some weren\'t. ([2])',
);
expect(() => expect([a, b, d]).not.to.be.horizontallyAligned('left')).to.throw(
'Expected elements not to be horizontally aligned to "left" but they were.',
);
});
it('(horizontal center)', function () {
const { a, b, c, d } = getLayoutFixture(`
|
a---------a
| |
a---------a
|
b-----b
b-----b
|
c----------c
| |
c----------c
d-------d
d-------d
|
|
`);
expect([a, b, d]).to.be.horizontallyAligned('center');
expect([a, b, c, d]).not.to.be.horizontallyAligned('center');
expect([a, b, c, d]).to.be.horizontallyAligned('center', 5.0);
expect(() => expect([a, b, c, d]).to.be.horizontallyAligned('center')).to.throw(
'Expected elements to be horizontally aligned to "center" but some weren\'t. ([2])',
);
expect(() => expect([a, b, d]).not.to.be.horizontallyAligned('center')).to.throw(
'Expected elements not to be horizontally aligned to "center" but they were.',
);
});
it('(horizontal right)', function () {
const { a, b, c, d } = getLayoutFixture(`
|
a---------a
| |
a---------a
|
b-----b
b-----b
|
c----------c |
| | |
c----------c |
d----d
d----d
|
|
`);
expect([a, b, d]).to.be.horizontallyAligned('right');
expect([a, b, c, d]).not.to.be.horizontallyAligned('right');
expect([a, b, c, d]).to.be.horizontallyAligned('right', 7.0);
expect(() => expect([a, b, c, d]).to.be.horizontallyAligned('right')).to.throw(
'Expected elements to be horizontally aligned to "right" but some weren\'t. ([2])',
);
expect(() => expect([a, b, d]).not.to.be.horizontallyAligned('right')).to.throw(
'Expected elements not to be horizontally aligned to "right" but they were.',
);
});
});
describe('Detect sequence of elements', function () {
it('horizontally', function () {
const { a, b, c, d } = getLayoutFixture(`
b--b d----d
a----a | | | |
| | b--bc-----------c | |
| | | | d----d
a----a c-----------c
`);
expect([a, b, c]).to.be.inHorizontalSequence();
expect([a, b, c, d]).not.to.be.inHorizontalSequence();
expect([a, b, c, d]).to.be.inHorizontalSequence({ tolerance: 4.0 });
expect(() => expect([a, b, c, d]).to.be.inHorizontalSequence()).to.throw(
"Expected elements to form horizontal sequence, but they didn't. (3)",
);
expect(() => expect([a, b, c]).not.to.be.inHorizontalSequence()).to.throw(
'Expected elements not to form horizontal sequence, but they did.',
);
expect(() => expect([]).to.be.inHorizontalSequence()).to.throw(
'Expected elements to form horizontal sequence, but element list was empty',
);
});
it('vertically', function () {
const { a, b, c, d } = getLayoutFixture(`
a-------a
| |
| |
a-------a
b------b
| |
b------b
c-------------c
| |
| |
| |
c-------------c
d---------d
| |
d---------d
`);
expect([a, b, c]).to.be.inVerticalSequence();
expect([a, b, c, d]).not.to.be.inVerticalSequence();
expect([a, b, c, d]).to.be.inVerticalSequence({ tolerance: 4.0 });
expect(() => expect([a, b, c, d]).to.be.inVerticalSequence()).to.throw(
"Expected elements to form vertical sequence, but they didn't. (3)",
);
expect(() => expect([a, b, c]).not.to.be.inVerticalSequence()).to.throw(
'Expected elements not to form vertical sequence, but they did.',
);
expect(() => expect([]).to.be.inVerticalSequence()).to.throw(
'Expected elements to form vertical sequence, but element list was empty',
);
});
it('with specified distance between horizontal elements', function () {
const { a, b, c, d } = getLayoutFixture(`
b--b d----d
a----a | | | |
| | b--b c-----------c | |
| | | | d----d
a----a c-----------c
`);
expect([a, b, c]).to.be.inHorizontalSequence({ tolerance: 0, distance: 3 });
expect([a, b, c, d]).to.not.be.inHorizontalSequence({ tolerance: 0, distance: 2 });
expect([a, b, c]).to.not.be.inHorizontalSequence({ tolerance: 0, distance: 1 });
expect([a, b, c, d]).to.be.inHorizontalSequence({ tolerance: 2, distance: 2 });
});
it('with specified distance between vertical elements', function () {
const { a, b, c, d } = getLayoutFixture(`
a-------a
| |
| |
a-------a
b------b
| |
b------b
c-------------c
| |
| |
| |
c-------------c
d---------d
| |
d---------d
`);
expect([a, b, c]).to.be.inVerticalSequence({ tolerance: 0, distance: 1 });
expect([a, b, c, d]).to.not.be.inVerticalSequence({ tolerance: 0, distance: 3 });
expect([a, b, c, d]).to.not.be.inVerticalSequence({ tolerance: 0, distance: 1 });
expect([a, b, c, d]).to.be.inVerticalSequence({ tolerance: 1, distance: 1 });
});
});
});