1 files changed, 23 insertions, 8 deletions
diff --git a/tests/node_compat/test.ts b/tests/node_compat/test.ts
index c9ec1544d..b5c9514a3 100644
--- a/tests/node_compat/test.ts
+++ b/tests/node_compat/test.ts
@@ -45,6 +45,12 @@ const darwinIgnorePaths = new Set(
 const decoder = new TextDecoder();
 let testSerialId = 0;
 
+function parseFlags(source: string): string[] {
+  const line = /^\/\/ Flags: (.+)$/um.exec(source);
+  if (line == null) return [];
+  return line[1].split(" ");
+}
+
 async function runTest(t: Deno.TestContext, path: string): Promise<void> {
   // If filter patterns are given and any pattern doesn't match
   // to the file path, then skip the case
@@ -69,14 +75,23 @@ async function runTest(t: Deno.TestContext, path: string): Promise<void> {
       const v8Flags = ["--stack-size=4000"];
       const testSource = await Deno.readTextFile(testCase);
       const envVars: Record<string, string> = {};
-      // TODO(kt3k): Parse `Flags` directive correctly
-      if (testSource.includes("Flags: --expose_externalize_string")) {
-        v8Flags.push("--expose-externalize-string");
-        // TODO(bartlomieju): disable verifying globals if that V8 flag is
-        // present. Even though we should be able to pass a list of globals
-        // that are allowed, it doesn't work, because the list is expected to
-        // contain actual JS objects, not strings :)).
-        envVars["NODE_TEST_KNOWN_GLOBALS"] = "0";
+      const knownGlobals: string[] = [];
+      parseFlags(testSource).forEach((flag) => {
+        switch (flag) {
+          case "--expose_externalize_string":
+            v8Flags.push("--expose-externalize-string");
+            knownGlobals.push("createExternalizableString");
+            break;
+          case "--expose-gc":
+            v8Flags.push("--expose-gc");
+            knownGlobals.push("gc");
+            break;
+          default:
+            break;
+        }
+      });
+      if (knownGlobals.length > 0) {
+        envVars["NODE_TEST_KNOWN_GLOBALS"] = knownGlobals.join(",");
       }
       // TODO(nathanwhit): once we match node's behavior on executing
       // `node:test` tests when we run a file, we can remove this