test: add tests for reported issues

test/unit/simplify/min-max.test.mjs

@@ -25,3 +25,10 @@ test('min with NaN propagates → calc(NaN)', () => {
   // Math.min(NaN, 5) is NaN (IEEE-754).
   assert.equal(out('min(NaN, 5)'), 'calc(NaN)');
 });
+
+test('min with subtraction', () => {
+  assert.equal(
+    out('min(360px, 100% - 24px - 24px)'),
+    'min(360px, 100% - 48px)'
+  );
+})

test/unit/simplify/pow.test.mjs

@@ -52,3 +52,7 @@ test('pow: wrong arity → opaque', () => {
 test('pow: case-insensitive', () => {
   assert.equal(out('POW(2, 3)'), out('pow(2, 3)'));
 });
+
+test('reduces pow with multiplication', () =>{
+  assert.equal(out('1rem * pow(1.618, 3)'), '4.2358rem');
+})

test/unit/simplify/reportedBugs.test.mjs

@@ -0,0 +1,74 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { out } from '../../helpers/out.mjs';
+
+test('does not output warnings', () => {
+  assert.equal(
+    out('calc(5.08lvh * var(--something))'),
+    'calc(5.08lvh * var(--something))'
+  );
+});
+
+test('multiple variable fallback', () => {
+  assert.equal(
+    out(
+      'var(--width-lg, var(--width-md, var(--width-sm, 0))) + var(--offset-lg, var(--offset-md, var(--offset-sm, 0)))'
+    ),
+    'calc(var(--width-lg, var(--width-md, var(--width-sm, 0))) + var(--offset-lg, var(--offset-md, var(--offset-sm, 0))))'
+  );
+});
+
+test('converts nested vars', () => {
+  assert.equal(
+    out(
+      'calc(\n' +
+        '    max(\n' +
+        '       var(1, var(2,3)), \n' +
+        '       var(4, var(5,6))\n' +
+        '    ) * 1)'
+    ),
+    'max(var(1, var(2, 3)), var(4, var(5, 6)))'
+  );
+});
+
+test('handles negative values at the end', () => {
+  assert.equal(out('calc(var(--my-var) * -1)'), 'calc(-1 * var(--my-var))');
+});
+
+test('can minimize float with unknown unit', () => {
+  assert.equal(out('calc(120rpx - 41.7rpx)'), '78.3rpx');
+});
+
+test('can minimize custom property and unknown unit', () => {
+  assert.equal(
+    out('var(--my-css-var) + -0.3cap'),
+    'calc(-0.3cap + var(--my-css-var))'
+  );
+});
+
+test('can minimize clamp and nested values', () => {
+  assert.equal(
+    out(
+      'calc(\n' +
+        '        1\n' +
+        '        * clamp(\n' +
+        '            1 ,\n' +
+        '            ((1 * 1) * 1) ,\n' +
+        '            1\n' +
+        '        )\n' +
+        '    )'
+    ),
+    '1'
+  );
+});
+
+test('can minimize max and min with custom property', () => {
+  assert.equal(
+    out('calc(min(max(var(--foo), 0), 100))'),
+    'min(max(var(--foo), 0), 100)'
+  );
+});
+
+test('can minimize nested combination of custom properties and multiplication', () => {
+  assert.equal(out('calc(var(--b, calc(var(--c) * 1)))'), 'var(--b, var(--c))');
+});