@@ -0,0 +1,15 @@
+#!/usr/bin/env python3
+
+import base64
+import os
+import sys
+
+module = base64.b64decode(
+    'AGFzbQEAAAABBwFgAn9/AX8DAgEABQMBAAEHEAIDYWRkAAAGbWVtb3J5AgAKCQEHACAAIAFqCwAaBG5hbWUAExJlbWJlZGRlZC1uYW1lLndhc20='
+)
+
+headers = b'Content-Type: application/wasm\r\n'
+if os.environ.get('QUERY_STRING') == 'memory-cache':
+    headers += b'Cache-Control: max-age=3600\r\n'
+
+sys.stdout.buffer.write(headers + b'\r\n' + module)
@@ -0,0 +1,11 @@
+let wasmInstances = [];
+
+addEventListener("message", async (event) => {
+    try {
+        let {instance} = await WebAssembly.instantiateStreaming(fetch(event.data));
+        wasmInstances.push(instance);
+        postMessage({result: "instantiated"});
+    } catch (error) {
+        postMessage({error: String(error)});
+    }
+});
@@ -0,0 +1,75 @@
+Tests that WebAssembly modules preserve URLs supplied by streaming fetches and the module loader.
+
+
+== Running test suite: WI.Script.URL.WebAssembly
+-- Running test case: WI.Script.URL.WebAssembly.Streaming
+PASS: Should preserve the WebAssembly module's real URL.
+PASS: Should not expose the resource URL as a `sourceURL` directive.
+PASS: Should use the WebAssembly module's name section as the display name.
+PASS: Should associate the WebAssembly script with a Resource.
+PASS: Should associate the WebAssembly script with the resource for the module URL.
+PASS: The associated Resource should use the WebAssembly module's name section as its display name.
+PASS: The Resource should be associated with the WebAssembly script.
+PASS: The associated Resource should be treated as a script.
+PASS: The WebAssembly script should belong to the main frame.
+PASS: The associated Resource should belong to the main frame.
+PASS: The resource-backed WebAssembly script should not be an extra script.
+
+-- Running test case: WI.Script.URL.WebAssembly.StreamingResponseClone
+PASS: Should preserve the WebAssembly module's real URL.
+PASS: Should not expose the resource URL as a `sourceURL` directive.
+PASS: Should use the WebAssembly module's name section as the display name.
+PASS: Should associate the WebAssembly script with a Resource.
+PASS: Should associate the WebAssembly script with the resource for the module URL.
+PASS: The associated Resource should use the WebAssembly module's name section as its display name.
+PASS: The Resource should be associated with the WebAssembly script.
+PASS: The associated Resource should be treated as a script.
+PASS: The WebAssembly script should belong to the main frame.
+PASS: The associated Resource should belong to the main frame.
+PASS: The resource-backed WebAssembly script should not be an extra script.
+PASS: Only one WebAssembly script should associate with a cloned Response's Resource.
+PASS: The additional clone should remain visible as an extra script.
+
+-- Running test case: WI.Script.URL.WebAssembly.ModuleLoader
+PASS: Should preserve the WebAssembly module's real URL.
+PASS: Should not expose the resource URL as a `sourceURL` directive.
+PASS: Should use the WebAssembly module's name section as the display name.
+PASS: Should associate the WebAssembly script with a Resource.
+PASS: Should associate the WebAssembly script with the resource for the module URL.
+PASS: The associated Resource should use the WebAssembly module's name section as its display name.
+PASS: The Resource should be associated with the WebAssembly script.
+PASS: The associated Resource should be treated as a script.
+PASS: The WebAssembly script should belong to the main frame.
+PASS: The associated Resource should belong to the main frame.
+PASS: The resource-backed WebAssembly script should not be an extra script.
+
+-- Running test case: WI.Script.URL.WebAssembly.WorkerStreaming
+PASS: Should create a Worker target.
+PASS: The Worker's WebAssembly script should associate with a Resource.
+PASS: The associated Resource should belong to the Worker target.
+PASS: The Worker's associated Resource should not belong to a frame.
+PASS: The resource-backed WebAssembly script should not remain an extra script.
+
+-- Running test case: WI.Script.URL.WebAssembly.RepeatedStreamingURL
+PASS: Should associate the repeated WebAssembly script with a Resource.
+PASS: Should preserve the repeated WebAssembly module's final response URL.
+PASS: Repeated loads of the same URL should associate with distinct Resources.
+PASS: Repeated loads of the same URL should preserve distinct request identifiers.
+
+-- Running test case: WI.Script.URL.WebAssembly.MemoryCache
+PASS: Should associate the initial WebAssembly script with a Resource.
+PASS: Should associate the cached WebAssembly script with a Resource.
+PASS: The repeated load should use the memory cache.
+PASS: The cached WebAssembly script should use the newly-created Resource.
+PASS: The cached WebAssembly script should not remain an extra script.
+
+-- Running test case: WI.Script.URL.WebAssembly.FetchedBytes
+PASS: The fetched bytes should have a Resource.
+PASS: The module should not associate after its fetch provenance is lost.
+PASS: The resource-less module should remain visible as an extra script.
+
+-- Running test case: WI.Script.URL.WebAssembly.DirectBytes
+PASS: Should not associate the WebAssembly script with a Resource.
+PASS: The WebAssembly script should belong to the main frame.
+PASS: The resource-less WebAssembly script should be an extra script.
+