263 lines
7.5 KiB
TypeScript
263 lines
7.5 KiB
TypeScript
import { describe, expect, test } from "bun:test";
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import { compileCss } from "../views/css/index.ts";
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import { evaluate } from "../views/css/evaluate.ts";
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import { defineHooks } from "../views/hooks.ts";
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/**
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* Tests of the structured css.
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*/
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describe("stcss", () => {
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test("flattens the nested rules", () => {
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const css = compileCss(`
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.card {
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color: red;
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&__title {
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font-weight: 700;
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}
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}
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`);
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expect(css).toContain(".card {");
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expect(css).toContain(".card__title {");
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expect(css).toContain("font-weight: 700;");
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});
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test("accepts Pug-like indentation, colonless declarations and blocks", () => {
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const css = compileCss(`
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$ink #101828
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.card
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color $ink
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padding 1rem
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&__title
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font-weight 700
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&:hover
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color #000
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`);
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expect(css).toContain(".card {");
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expect(css).toContain("color: #101828;");
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expect(css).toContain("padding: 1rem;");
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expect(css).toContain(".card__title {");
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expect(css).toContain(".card:hover {");
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});
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test("accepts Pug-like at-rule blocks", () => {
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const css = compileCss(`
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.panel
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width: 30rem
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@media (max-width: 48rem)
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width 100%
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`);
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expect(css).toContain(".panel {");
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expect(css).toContain("@media (max-width: 48rem)");
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expect(css).toContain("width: 100%;");
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});
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test("runs application-defined STCSS expansions from a contextual registry", () => {
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const hooks = defineHooks((hook) => {
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hook.stcss.value("double", ({ inner, resolve }) => `calc(${resolve(inner)} * 2)`);
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hook.stcss.declaration(({ selector, declaration }) => declaration.property === "outline-token"
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? [`${selector}::before { content: "hook"; }`]
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: undefined);
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hook.stcss.atRule("paint", ({ selector, params }) => `${selector} { color: ${params}; }`);
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});
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const css = compileCss(`.card { width: double(12px); outline-token: yes; @paint rebeccapurple; }`, { hooks });
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expect(css).toContain("width: calc(12px * 2);");
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expect(css).toContain('.card::before { content: "hook"; }');
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expect(css).toContain(".card { color: rebeccapurple; }");
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});
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test("expands calculation hooks and centered position aliases", () => {
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const css = compileCss(`
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.dialog {
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position: fixed-center;
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width: 30rem;
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margin-left: $offset($center(30rem), $pad);
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padding: $pad(2);
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}
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.page-dialog { position: page-center; transform: scale(.96); }
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`);
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expect(css).toContain("position: fixed;");
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expect(css).toContain("left: 50%;");
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expect(css).toContain("top: 50%;");
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expect(css).toContain("transform: translate(-50%, -50%);");
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expect(css).toContain("margin-left: calc(calc(50% - (30rem / 2)) + var(--muddle-pad, 1rem));");
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expect(css).toContain("padding: calc(var(--muddle-pad, 1rem) * 2);");
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expect(css).toContain("position: absolute;");
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expect(css).toContain("transform: translate(-50%, -50%) scale(.96);");
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});
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test("registers application calculation hooks", () => {
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const hooks = defineHooks((hook) => {
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hook.stcss.calculation("third", ({ args, resolve }) => `calc(${resolve(args ?? "100%")} / 3)`);
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});
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expect(compileCss(".column { width: $third(90%); }", { hooks })).toContain("width: calc(90% / 3);");
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});
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test("resolves the variables", () => {
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const css = compileCss(`
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$ink: #101828;
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.body {
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color: $ink;
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}
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`);
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expect(css).toContain("color: #101828;");
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});
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test("interpolates an expression", () => {
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const css = compileCss(`
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$space: 1;
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.gutter {
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padding: #{$space * 2}rem;
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}
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`);
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expect(css).toContain("padding: 2rem;");
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});
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test("repeats a block", () => {
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const css = compileCss(`
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@each $space in 1 2 3 {
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.space-#{$space} {
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margin: #{$space * 0.5}rem;
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}
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}
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`);
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expect(css).toContain(".space-1 {");
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expect(css).toContain(".space-2 {");
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expect(css).toContain(".space-3 {");
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expect(css).toContain("margin: 1.5rem;");
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});
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test("counts a range", () => {
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const css = compileCss(`
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@for $i from 1 through 2 {
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.col-#{$i} {
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width: #{$i * 10}%;
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}
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}
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`);
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expect(css).toContain(".col-1 {");
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expect(css).toContain(".col-2 {");
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});
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test("expands a mixin", () => {
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const css = compileCss(`
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@mixin rounded($size) {
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border-radius: $size;
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}
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.button {
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@include rounded(4px);
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color: blue;
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}
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`);
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expect(css).toContain("border-radius: 4px;");
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expect(css).toContain("color: blue;");
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});
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test("keeps the css functions untouched", () => {
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const css = compileCss(`
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.box {
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border: 1px solid rgba(16, 24, 40, 0.12);
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color: rgb(1, 2, 3);
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}
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`);
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expect(css).toContain("rgba(16, 24, 40, 0.12)");
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expect(css).toContain("rgb(1, 2, 3)");
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});
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test("darkens a colour", () => {
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const css = compileCss(`
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.button {
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color: darken(#2b6cb0, 10);
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}
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`);
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expect(css).toMatch(/color: #[0-9a-f]{6};/);
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});
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test("evaluates an expression", () => {
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expect(evaluate("$a * 2", { scope: { $a: "21" } })).toBe("42");
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expect(evaluate("$a + 1", { scope: { $a: "1" } })).toBe("2");
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});
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test("compiles anchor relations, loop ranges and back-propagated state", () => {
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const css = compileCss(`
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@each $n in [0..2] {
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nav:with(@hello$n:active) li:nth-child(#{$n + 1}) {
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left: calc($relate(d"@hello{$n + 1}") + $relate[width](d"@hello{$n + 1}"));
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color: @hello$n.computed.backgroundColor;
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}
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}
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nav li:when(nav @hello1:clicked) { opacity: 1; }
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`);
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expect(css).toContain('nav:has([data-muddle-anchor="hello0"]:active) li:nth-child(1)');
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expect(css).toContain("var(--muddle-relate-hello1-x)");
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expect(css).toContain("var(--muddle-relate-hello1-width)");
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expect(css).toContain('nav:has([data-muddle-anchor="hello1"]:active) li');
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});
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test("resolves $refer as a relation value", () => {
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const css = compileCss(`.tooltip { left: $refer[left](@trigger); width: $refer[width](@trigger); }`);
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expect(css).toContain("var(--muddle-relate-trigger-x)");
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expect(css).toContain("var(--muddle-relate-trigger-width)");
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});
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test("reflects dotted anchor groups without enumerating their members", () => {
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const css = compileCss(`:reflect(@docs) { scroll-margin-top: 4rem; }`);
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expect(css).toContain('[data-muddle-anchor^="docs."]');
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});
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test("expands concentric border radii", () => {
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const css = compileCss(`
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.panel {
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padding: 1rem;
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border: 2px solid #333;
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border-radius: concentric 0.75rem;
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}
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.panel-default {
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border-radius: concentric;
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}
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.blind {
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padding: 12px;
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border: var(--bw, 1px) solid;
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border-radius: concentric var(--outer, 12px);
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}
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`);
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expect(css).toContain(".panel > * {\n\tborder-radius: calc((0.75rem) - (1rem) - (2px));");
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expect(css).toContain(".panel-default > * {\n\tborder-radius: inherit;");
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expect(css).toContain(".blind > * {\n\tborder-radius: calc((var(--outer, 12px)) - (12px) - (var(--bw, 1px)));");
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});
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test("expands freeform gradients into radial gradient stacks", () => {
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const css = compileCss(`
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.paint {
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background-image: freeform-gradient(hsl(270 50% 60%) 10% 50%, red 70% 40%, rgb(0 128 0) 40% 80% 30%);
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}
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`);
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expect(css).toContain("radial-gradient(circle farthest-side at 10% 50%, hsl(270 50% 60%), transparent)");
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expect(css).toContain("radial-gradient(circle farthest-side at 70% 40%, red, transparent)");
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expect(css).toContain("radial-gradient(circle at 40% 80%, rgb(0 128 0), rgb(0 128 0) calc(30% * 0.97), transparent 30%)");
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expect(() => compileCss(".x { background-image: freeform-gradient(red 1% 2% 3% 4%); }")).toThrow();
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});
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});
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describe("stcss @measure", () => {
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test("records prediction targets and anchors them as relations", () => {
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const measured: string[] = [];
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const css = compileCss(`
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.ribbon {
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@measure;
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}
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@measure @trigger, .card, panel;
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`, { measured });
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expect(css).toContain("/* muddle-predict:");
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expect(measured).toEqual([
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".ribbon",
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'[data-muddle-anchor="trigger"]',
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".card",
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"panel",
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]);
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});
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});
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