test: convert tests to use built-in Node.js runner

package.json

@@ -25,7 +25,7 @@
     "prepare": "pnpm run build && tsc",
     "build": "jison ./parser.jison -o src/parser.js",
     "lint": "eslint . && tsc",
-    "test": "uvu test"
+    "test": "node --test"
   },
   "author": "Andy Jansson",
   "license": "MIT",
@@ -39,8 +39,7 @@
     "jison-gho": "^0.6.1-216",
     "postcss": "^8.4.38",
     "prettier": "^3.2.5",
-    "typescript": "~5.4.5",
-    "uvu": "^0.5.6"
+    "typescript": "~5.4.5"
   },
   "dependencies": {
     "postcss-selector-parser": "^6.0.16",

test/convertUnit.js

@@ -1,6 +1,6 @@
 'use strict';
-const { test } = require('uvu');
-const assert = require('uvu/assert');
+const { test } = require('node:test');
+const assert = require('node:assert/strict');
 
 const convertUnit = require('../src/lib/convertUnit.js');
 
@@ -96,7 +96,7 @@ test('valid conversions', () => {
     const expected = e[2];
     const targetUnit = e[3];
 
-    assert.is(
+    assert.strictEqual(
       convertUnit(value, unit, targetUnit),
       expected,
       unit + ' -> ' + targetUnit
@@ -406,7 +406,7 @@ test('precision', () => {
     const expected = e[2];
     const targetUnit = e[3];
 
-    assert.is(
+    assert.strictEqual(
       convertUnit(value, unit, targetUnit, precision),
       expected,
       unit + ' -> ' + targetUnit
@@ -415,7 +415,6 @@ test('precision', () => {
 });
 
 test('falsey precision', () => {
-  assert.is(convertUnit(10, 'px', 'cm', false), 0.26458333333333334);
+  assert.strictEqual(convertUnit(10, 'px', 'cm', false), 0.26458333333333334);
 });
 
-test.run();

test/index.js

@@ -1,6 +1,6 @@
 'use strict';
-const { test } = require('uvu');
-const assert = require('uvu/assert');
+const { test } = require('node:test');
+const assert = require('node:assert/strict');
 const postcss = require('postcss');
 
 const reduceCalc = require('../src/index.js');
@@ -16,7 +16,7 @@ function testValue(fixture, expected, opts = {}) {
       fixture,
       postcssOpts
     );
-    assert.is(result.css, expected);
+    assert.strictEqual(result.css, expected);
   };
 }
 
@@ -26,7 +26,7 @@ function testCss(fixture, expected, opts = {}) {
       fixture,
       postcssOpts
     );
-    assert.is(result.css, expected);
+    assert.strictEqual(result.css, expected);
   };
 }
 
@@ -40,8 +40,8 @@ function testThrows(fixture, expected, warning, opts = {}) {
       postcssOpts
     );
     const warnings = result.warnings();
-    assert.is(result.css, expected);
-    assert.is(warnings[0].text, warning);
+    assert.strictEqual(result.css, expected);
+    assert.strictEqual(warnings[0].text, warning);
   };
 }
 
@@ -910,5 +910,3 @@ test(
     'Lexical error on line 1: Unrecognized text.\n\n  Erroneous area:\n1: 10pc + unknown\n^.........^'
   )
 );
-
-test.run();