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const {toLineHeight, toPadding, toFont, resolve, toTRBLCorners} = Chart.helpers;
describe('Chart.helpers.options', function() {
describe('toLineHeight', function() {
it ('should support keyword values', function() {
expect(toLineHeight('normal', 16)).toBe(16 * 1.2);
});
it ('should support unitless values', function() {
expect(toLineHeight(1.4, 16)).toBe(16 * 1.4);
expect(toLineHeight('1.4', 16)).toBe(16 * 1.4);
});
it ('should support length values', function() {
expect(toLineHeight('42px', 16)).toBe(42);
expect(toLineHeight('1.4em', 16)).toBe(16 * 1.4);
});
it ('should support percentage values', function() {
expect(toLineHeight('140%', 16)).toBe(16 * 1.4);
});
it ('should fallback to default (1.2) for invalid values', function() {
expect(toLineHeight(null, 16)).toBe(16 * 1.2);
expect(toLineHeight(undefined, 16)).toBe(16 * 1.2);
expect(toLineHeight('foobar', 16)).toBe(16 * 1.2);
});
});
describe('toTRBLCorners', function() {
it('should support number values', function() {
expect(toTRBLCorners(4)).toEqual(
{topLeft: 4, topRight: 4, bottomLeft: 4, bottomRight: 4});
expect(toTRBLCorners(4.5)).toEqual(
{topLeft: 4.5, topRight: 4.5, bottomLeft: 4.5, bottomRight: 4.5});
});
it('should support string values', function() {
expect(toTRBLCorners('4')).toEqual(
{topLeft: 4, topRight: 4, bottomLeft: 4, bottomRight: 4});
expect(toTRBLCorners('4.5')).toEqual(
{topLeft: 4.5, topRight: 4.5, bottomLeft: 4.5, bottomRight: 4.5});
});
it('should support object values', function() {
expect(toTRBLCorners({topLeft: 1, topRight: 2, bottomLeft: 3, bottomRight: 4})).toEqual(
{topLeft: 1, topRight: 2, bottomLeft: 3, bottomRight: 4});
expect(toTRBLCorners({topLeft: 1.5, topRight: 2.5, bottomLeft: 3.5, bottomRight: 4.5})).toEqual(
{topLeft: 1.5, topRight: 2.5, bottomLeft: 3.5, bottomRight: 4.5});
expect(toTRBLCorners({topLeft: '1', topRight: '2', bottomLeft: '3', bottomRight: '4'})).toEqual(
{topLeft: 1, topRight: 2, bottomLeft: 3, bottomRight: 4});
});
it('should fallback to 0 for invalid values', function() {
expect(toTRBLCorners({topLeft: 'foo', topRight: 'foo', bottomLeft: 'foo', bottomRight: 'foo'})).toEqual(
{topLeft: 0, topRight: 0, bottomLeft: 0, bottomRight: 0});
expect(toTRBLCorners({topLeft: null, topRight: null, bottomLeft: null, bottomRight: null})).toEqual(
{topLeft: 0, topRight: 0, bottomLeft: 0, bottomRight: 0});
expect(toTRBLCorners({})).toEqual(
{topLeft: 0, topRight: 0, bottomLeft: 0, bottomRight: 0});
expect(toTRBLCorners('foo')).toEqual(
{topLeft: 0, topRight: 0, bottomLeft: 0, bottomRight: 0});
expect(toTRBLCorners(null)).toEqual(
{topLeft: 0, topRight: 0, bottomLeft: 0, bottomRight: 0});
expect(toTRBLCorners(undefined)).toEqual(
{topLeft: 0, topRight: 0, bottomLeft: 0, bottomRight: 0});
});
});
describe('toPadding', function() {
it ('should support number values', function() {
expect(toPadding(4)).toEqual(
{top: 4, right: 4, bottom: 4, left: 4, height: 8, width: 8});
expect(toPadding(4.5)).toEqual(
{top: 4.5, right: 4.5, bottom: 4.5, left: 4.5, height: 9, width: 9});
});
it ('should support string values', function() {
expect(toPadding('4')).toEqual(
{top: 4, right: 4, bottom: 4, left: 4, height: 8, width: 8});
expect(toPadding('4.5')).toEqual(
{top: 4.5, right: 4.5, bottom: 4.5, left: 4.5, height: 9, width: 9});
});
it ('should support object values', function() {
expect(toPadding({top: 1, right: 2, bottom: 3, left: 4})).toEqual(
{top: 1, right: 2, bottom: 3, left: 4, height: 4, width: 6});
expect(toPadding({top: 1.5, right: 2.5, bottom: 3.5, left: 4.5})).toEqual(
{top: 1.5, right: 2.5, bottom: 3.5, left: 4.5, height: 5, width: 7});
expect(toPadding({top: '1', right: '2', bottom: '3', left: '4'})).toEqual(
{top: 1, right: 2, bottom: 3, left: 4, height: 4, width: 6});
});
it ('should fallback to 0 for invalid values', function() {
expect(toPadding({top: 'foo', right: 'foo', bottom: 'foo', left: 'foo'})).toEqual(
{top: 0, right: 0, bottom: 0, left: 0, height: 0, width: 0});
expect(toPadding({top: null, right: null, bottom: null, left: null})).toEqual(
{top: 0, right: 0, bottom: 0, left: 0, height: 0, width: 0});
expect(toPadding({})).toEqual(
{top: 0, right: 0, bottom: 0, left: 0, height: 0, width: 0});
expect(toPadding('foo')).toEqual(
{top: 0, right: 0, bottom: 0, left: 0, height: 0, width: 0});
expect(toPadding(null)).toEqual(
{top: 0, right: 0, bottom: 0, left: 0, height: 0, width: 0});
expect(toPadding(undefined)).toEqual(
{top: 0, right: 0, bottom: 0, left: 0, height: 0, width: 0});
});
it('should support x / y shorthands', function() {
expect(toPadding({x: 1, y: 2})).toEqual(
{top: 2, right: 1, bottom: 2, left: 1, height: 4, width: 2});
expect(toPadding({x: 1, left: 0})).toEqual(
{top: 0, right: 1, bottom: 0, left: 0, height: 0, width: 1});
expect(toPadding({y: 5, bottom: 0})).toEqual(
{top: 5, right: 0, bottom: 0, left: 0, height: 5, width: 0});
});
});
describe('toFont', function() {
it('should return a font with default values', function() {
const defaultFont = Object.assign({}, Chart.defaults.font);
Object.assign(Chart.defaults.font, {
family: 'foobar',
size: 42,
style: 'oblique 9deg',
lineHeight: 1.5
});
expect(toFont({})).toEqual({
family: 'foobar',
lineHeight: 63,
size: 42,
string: 'oblique 9deg 42px foobar',
style: 'oblique 9deg',
weight: null
});
Object.assign(Chart.defaults.font, defaultFont);
});
it ('should return a font with given values', function() {
expect(toFont({
family: 'bla',
lineHeight: 8,
size: 21,
style: 'oblique -90deg'
})).toEqual({
family: 'bla',
lineHeight: 8 * 21,
size: 21,
string: 'oblique -90deg 21px bla',
style: 'oblique -90deg',
weight: null
});
});
it ('should handle a string font size', function() {
expect(toFont({
family: 'bla',
lineHeight: 8,
size: '21',
style: 'italic'
})).toEqual({
family: 'bla',
lineHeight: 8 * 21,
size: 21,
string: 'italic 21px bla',
style: 'italic',
weight: null
});
});
it('should return null as a font string if size or family are missing', function() {
const fontFamily = Chart.defaults.font.family;
const fontSize = Chart.defaults.font.size;
delete Chart.defaults.font.family;
delete Chart.defaults.font.size;
expect(toFont({
style: 'italic',
size: 12
}).string).toBeNull();
expect(toFont({
style: 'italic',
family: 'serif'
}).string).toBeNull();
Chart.defaults.font.family = fontFamily;
Chart.defaults.font.size = fontSize;
});
it('font.style should be optional for font strings', function() {
const fontStyle = Chart.defaults.font.style;
delete Chart.defaults.font.style;
expect(toFont({
size: 12,
family: 'serif'
}).string).toBe('12px serif');
Chart.defaults.font.style = fontStyle;
});
});
describe('resolve', function() {
it ('should fallback to the first defined input', function() {
expect(resolve([42])).toBe(42);
expect(resolve([42, 'foo'])).toBe(42);
expect(resolve([undefined, 42, 'foo'])).toBe(42);
expect(resolve([42, 'foo', undefined])).toBe(42);
expect(resolve([undefined])).toBe(undefined);
});
it ('should correctly handle empty values (null, 0, "")', function() {
expect(resolve([0, 'foo'])).toBe(0);
expect(resolve(['', 'foo'])).toBe('');
expect(resolve([null, 'foo'])).toBe(null);
});
it ('should support indexable options if index is provided', function() {
var input = [42, 'foo', 'bar'];
expect(resolve([input], undefined, 0)).toBe(42);
expect(resolve([input], undefined, 1)).toBe('foo');
expect(resolve([input], undefined, 2)).toBe('bar');
});
it ('should fallback if an indexable option value is undefined', function() {
var input = [42, undefined, 'bar'];
expect(resolve([input], undefined, 1)).toBe(undefined);
expect(resolve([input, 'foo'], undefined, 1)).toBe('foo');
});
it ('should loop if an indexable option index is out of bounds', function() {
var input = [42, undefined, 'bar'];
expect(resolve([input], undefined, 3)).toBe(42);
expect(resolve([input, 'foo'], undefined, 4)).toBe('foo');
expect(resolve([input, 'foo'], undefined, 5)).toBe('bar');
});
it ('should not handle indexable options if index is undefined', function() {
var array = [42, 'foo', 'bar'];
expect(resolve([array])).toBe(array);
expect(resolve([array], undefined, undefined)).toBe(array);
});
it ('should support scriptable options if context is provided', function() {
var input = function(context) {
return context.v * 2;
};
expect(resolve([42], {v: 42})).toBe(42);
expect(resolve([input], {v: 42})).toBe(84);
});
it ('should fallback if a scriptable option returns undefined', function() {
var input = function() {};
expect(resolve([input], {v: 42})).toBe(undefined);
expect(resolve([input, 'foo'], {v: 42})).toBe('foo');
expect(resolve([input, undefined, 'foo'], {v: 42})).toBe('foo');
});
it ('should not handle scriptable options if context is undefined', function() {
var input = function(context) {
return context.v * 2;
};
expect(resolve([input])).toBe(input);
expect(resolve([input], undefined)).toBe(input);
});
it ('should handle scriptable and indexable option', function() {
var input = function(context) {
return [context.v, undefined, 'bar'];
};
expect(resolve([input, 'foo'], {v: 42}, 0)).toBe(42);
expect(resolve([input, 'foo'], {v: 42}, 1)).toBe('foo');
expect(resolve([input, 'foo'], {v: 42}, 5)).toBe('bar');
expect(resolve([input, ['foo', 'bar']], {v: 42}, 1)).toBe('bar');
});
});
});
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