From 5e25771b0a44f024678628def7d4e66c4f2b5301 Mon Sep 17 00:00:00 2001
From: dish <pyrox@pyrox.dev>
Date: Sun, 1 Mar 2026 13:09:30 -0500
Subject: [PATCH] tests.writers: replace semver with katex in writeJS* tests

Part of #489959
---
 pkgs/build-support/writers/test.nix | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/pkgs/build-support/writers/test.nix b/pkgs/build-support/writers/test.nix
index 971b38ff46b0..e39681865ab2 100644
--- a/pkgs/build-support/writers/test.nix
+++ b/pkgs/build-support/writers/test.nix
@@ -3,7 +3,7 @@
   lib,
   guile-lib,
   akkuPackages,
-  nodePackages,
+  katex,
   perlPackages,
   python3Packages,
   runCommand,
@@ -148,13 +148,14 @@ recurseIntoAttrs {
     );
 
     js = expectSuccessBin (
-      writeJSBin "test-writers-js-bin" { libraries = [ nodePackages.semver ]; } ''
-        var semver = require('semver');
+      writeJSBin "test-writers-js-bin" { libraries = [ katex ]; } ''
+        var katex = require('katex');
 
-        if (semver.valid('1.2.3')) {
-          console.log('success')
+        var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}");
+        if (html instanceof katex.ParseError) {
+          console.log("fail")
         } else {
-          console.log('fail')
+          console.log("success")
         }
       ''
     );
@@ -319,13 +320,14 @@ recurseIntoAttrs {
     );
 
     js = expectSuccess (
-      writeJS "test-writers-js" { libraries = [ nodePackages.semver ]; } ''
-        var semver = require('semver');
+      writeJS "test-writers-js" { libraries = [ katex ]; } ''
+        var katex = require('katex');
 
-        if (semver.valid('1.2.3')) {
-          console.log('success')
+        var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}");
+        if (html instanceof katex.ParseError) {
+          console.log("fail")
         } else {
-          console.log('fail')
+          console.log("success")
         }
       ''
     );