Add tests for fixed edge cases (#1059)

* test(postcss-merge-longhand): check invalid border property handling

* test(postcss-convert-values): add test case for #958

Co-authored-by: Shipov Mikhail <mshipov@yandex.ru>

packages/postcss-convert-values/src/__tests__/index.js

@@ -382,6 +382,26 @@ test(
   passthroughCSS('h1{top:0\\9\\0;left:0lightyear}')
 );
 
+test(
+  'should not try to convert keyframe names in animation',
+  passthroughCSS(
+    'h1{ -webkit-animation: e836684w2 } h2{ animation: e836684w2 }'
+  )
+);
+
+test(
+  'should not try to convert keyframe names in animation (case 2)',
+  passthroughCSS(
+    `
+.e4yw0Q {
+    animation: e4yw0Q;
+}
+
+@keyframes e4yw0Q {}
+    `
+  )
+);
+
 ['stroke-dasharray', 'stroke-dashoffset', 'stroke-width'].forEach(
   (property) => {
     test(

packages/postcss-merge-longhand/src/__tests__/borders.js

@@ -1203,6 +1203,13 @@ test(
   )
 );
 
+test(
+  'should not break border rules mixing custorm and regular properties',
+  passthroughCSS(
+    'h1{border:var(--v1) solid var(--v2, #abc123);border-right-color:blue}'
+  )
+);
+
 test(
   'should overwrite some border-width props and save fallbacks and preserve case #648 2',
   processCSS(