1 files changed, 15 insertions, 0 deletions
diff --git a/tests/run-make/wasm-custom-sections-opt/foo.js b/tests/run-make/wasm-custom-sections-opt/foo.js
new file mode 100644
index 00000000000..9663f377ef4
--- /dev/null
+++ b/tests/run-make/wasm-custom-sections-opt/foo.js
@@ -0,0 +1,15 @@
+const fs = require('fs');
+const process = require('process');
+const assert = require('assert');
+const buffer = fs.readFileSync(process.argv[2]);
+
+let m = new WebAssembly.Module(buffer);
+
+sections = WebAssembly.Module.customSections(m, "foo");
+console.log('section foo', sections);
+assert.strictEqual(sections.length, 1, "didn't create `foo` section");
+section = new Uint8Array(sections[0]);
+console.log('contents', section);
+assert.strictEqual(section.length, 4, "didn't concatenate `foo` sections");
+
+process.exit(0);