Bug 1698260 - [devtools] Fix autocomplete for Infinity. r=devtools-reviewers,ochameau.

Differential Revision: https://phabricator.services.mozilla.com/D204478

devtools/shared/webconsole/js-property-provider.js

@@ -650,7 +650,7 @@ function getMatchedPropsImpl(obj, match, { chainIterator, getProperties }) {
       // This uses a trick: converting a string to a number yields NaN if
       // the operation failed, and NaN is not equal to itself.
       // eslint-disable-next-line no-self-compare
-      if (+prop != +prop) {
+      if (+prop != +prop || prop === "Infinity") {
         matches.add(prop);
       }
 

devtools/shared/webconsole/test/xpcshell/test_js_property_provider.js

@@ -164,6 +164,7 @@ function runChecks(dbgObject, environment, sandbox) {
   info("Test that suggestions are given for '(globalThis).'");
   results = propertyProvider("(globalThis).");
   test_has_result(results, "testObject");
+  test_has_result(results, "Infinity");
 
   info(
     "Test that suggestions are given for deep 'globalThis' properties access"
@@ -705,6 +706,10 @@ function runChecks(dbgObject, environment, sandbox) {
   results = propertyProvider(`testSelfPrototypeProxy.`);
   test_has_result(results, `hello`);
   test_has_result(results, `hasOwnProperty`);
+
+  info("Test suggestion for Infinity");
+  results = propertyProvider("Inf");
+  test_has_result(results, "Infinity");
 }
 
 /**