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index.test.js
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index.test.js
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const postcss = require('postcss')
const plugin = require('./')
const Color = require('color');
async function run(input, output, opts = {}) {
let result = await postcss([plugin(opts)]).process(input, {
from: undefined
})
expect(result.css.trim()).toEqual(output.trim())
expect(result.warnings()).toHaveLength(0)
}
let base = `
@lumen themes;
@lumen components;
`
it('creates CSS rules for themes', async () => {
let configuration = {
themes: {
default: {},
dark: {}
}
};
let expected = `
:root {}
[data-theme="dark"] {}`
await run(base, expected, configuration)
})
it('creates design tokens', async () => {
let configuration = {
themes: {
default: {
tokens: {
primary: '#000000',
secondary: '#ffffff'
}
},
dark: {
tokens: {
primary: '#ffffff',
secondary: '#000000'
}
}
}
};
let expected = `
:root {
--primary: #000000;
--secondary: #ffffff
}
[data-theme="dark"] {
--primary: #ffffff;
--secondary: #000000
}`
await run(base, expected, configuration)
})
it('creates CSS rules for component variants', async () => {
let configuration = {
themes: {
default: {},
dark: {}
},
components: {
button: {
success: {
default: {
},
dark: {
}
}
}
}
};
let expected = `
:root {}
[data-theme="dark"] {}
.lds-button.success {}
[data-theme="dark"] .lds-button.success {}`
await run(base, expected, configuration)
})
it('applies generator functions', async () => {
let configuration = {
generators: [
{
component: 'button',
property: 'bg',
run:
(value, theme) => {
let template = /\{([a-zA-Z0-9\-_]*)\}/g.exec(value);
let bg;
if (template) {
bg = theme.tokens[template[1]];
} else {
bg = value;
}
let
borderPrimary,
borderSecondary,
bg_hover,
borderPrimary_hover,
borderSecondary_hover,
bg_active,
borderPrimary_active;
const color = Color(bg);
if (theme.mode == "dark") {
borderPrimary = color.lighten(0.1).hsl();
borderSecondary = color.lighten(0.2).hsl();
bg_hover = color.lighten(0.25).hsl();
borderPrimary_hover = color.lighten(0.3).hsl();
borderSecondary_hover = color.lighten(0.4).hsl();
bg_active = color.lighten(0.15).hsl();
borderPrimary_active = color.lighten(0.2).hsl();
} else {
borderPrimary = color.darken(0.1).hsl();
borderSecondary = color.darken(0.2).hsl();
bg_hover = color.darken(0.25).hsl();
borderPrimary_hover = color.darken(0.3).hsl();
borderSecondary_hover = color.darken(0.4).hsl();
bg_active = color.darken(0.15).hsl();
borderPrimary_active = color.darken(0.2).hsl();
}
return [
{ prop: '--lds-borderPrimary-preset', value: borderPrimary.string() },
{ prop: '--lds-borderSecondary-preset', value: borderSecondary.string() },
{ prop: '--lds-bg_hover-preset', value: bg_hover.string() },
{ prop: '--lds-borderPrimary_hover-preset', value: borderPrimary_hover.string() },
{ prop: '--lds-borderSecondary_hover-preset', value: borderSecondary_hover.string() },
{ prop: '--lds-bg_active-preset', value: bg_active.string() },
{ prop: '--lds-borderPrimary_active-preset', value: borderPrimary_active.string() },
]
}
}
],
themes: {
default: {},
dark: {}
},
components: {
button: {
success: {
default: {
bg: 'green',
borderSecondary: 'lime'
},
dark: {
bg: 'darkgreen'
}
}
}
}
};
let expected = `
:root {}
[data-theme="dark"] {}
.lds-button.success {
--lds-bg: green;
--lds-borderPrimary-preset: hsl(120, 100%, 22.6%);
--lds-borderSecondary-preset: hsl(120, 100%, 20.1%);
--lds-bg_hover-preset: hsl(120, 100%, 18.8%);
--lds-borderPrimary_hover-preset: hsl(120, 100%, 17.6%);
--lds-borderSecondary_hover-preset: hsl(120, 100%, 15.1%);
--lds-bg_active-preset: hsl(120, 100%, 21.3%);
--lds-borderPrimary_active-preset: hsl(120, 100%, 20.1%);
--lds-borderSecondary: lime
}
[data-theme="dark"] .lds-button.success {
--lds-bg: darkgreen;
--lds-borderPrimary-preset: hsl(120, 100%, 17.6%);
--lds-borderSecondary-preset: hsl(120, 100%, 15.7%);
--lds-bg_hover-preset: hsl(120, 100%, 14.7%);
--lds-borderPrimary_hover-preset: hsl(120, 100%, 13.7%);
--lds-borderSecondary_hover-preset: hsl(120, 100%, 11.8%);
--lds-bg_active-preset: hsl(120, 100%, 16.7%);
--lds-borderPrimary_active-preset: hsl(120, 100%, 15.7%)
}`
await run(base, expected, configuration)
})
it('creates CSS declarations with reference values', async () => {
// E.g. converting "{green-500}" to "var(--green-500)"
let configuration = {
themes: {
default: {
mode: "light",
tokens: {
red: '#ff0000',
redDark: '#de1212',
redVeryDark: '#b30b0b'
}
},
dark: {
mode: "dark",
tokens: {
red: '#ff0000',
redDark: '#752b2b',
redVeryDark: '#400606'
}
}
},
components: {
button: {
danger: {
default: {
bg: '{red}',
borderPrimary: '{redDark}'
},
dark: {
borderPrimary: '{redVeryDark}'
}
}
}
}
};
let expected = `
:root {
--red: #ff0000;
--redDark: #de1212;
--redVeryDark: #b30b0b
}
[data-theme="dark"] {
--red: #ff0000;
--redDark: #752b2b;
--redVeryDark: #400606
}
.lds-button.danger {
--lds-bg: var(--red);
--lds-borderPrimary: var(--redDark)
}
[data-theme="dark"] .lds-button.danger {
--lds-borderPrimary: var(--redVeryDark)
}`
await run(base, expected, configuration)
})