Refactor tests (#18743)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

tests/format/less/_errors_/__snapshots__/format.test.js.snap

@@ -0,0 +1,41 @@
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
+
+exports[`inline-comment.less format 1`] = `
+"CssSyntaxError: Unknown word inline (5:4)
+  3 | a{
+  4 | 	prop
+> 5 | // inline
+    |    ^
+  6 | :
+  7 | value;
+  8 | }
+Cause: <css input>:5:4: Unknown word inline"
+`;
+
+exports[`open-double-quote.less format 1`] = `
+"CssSyntaxError: Unclosed string (2:17)
+  1 | a {
+> 2 | background: url("
+    |                 ^
+  3 | }
+  4 |
+Cause: <css input>:2:17: Unclosed string"
+`;
+
+exports[`open-sigle-quote.less format 1`] = `
+"CssSyntaxError: Unclosed string (2:17)
+  1 | a {
+> 2 | background: url('
+    |                 ^
+  3 | }
+  4 |
+Cause: <css input>:2:17: Unclosed string"
+`;
+
+exports[`scss-syntax.scss format 1`] = `
+"CssSyntaxError: Unknown word $foo (1:15)
+> 1 | a {content: #{$foo}}
+    |               ^
+  2 |
+Cause: <css input>:1:15: Unknown word $foo"
+`;

tests/format/less/_errors_/format.test.js

@@ -0,0 +1 @@
+runFormatTest(import.meta, ["less"]);

tests/format/less/_errors_/inline-comment.less

@@ -0,0 +1,8 @@
+// Less parser don't support inline comment before colon
+
+a{
+	prop
+// inline
+:
+value;
+}

tests/format/less/_errors_/open-double-quote.less

@@ -0,0 +1,3 @@
+a {
+background: url("
+}

tests/format/less/_errors_/open-sigle-quote.less

@@ -0,0 +1,3 @@
+a {
+background: url('
+}

tests/format/less/_errors_/scss-syntax.scss

@@ -0,0 +1 @@
+a {content: #{$foo}}