web: repair config source editor

web/workspace/test/config-source/toolchain.test.ts

@@ -0,0 +1,109 @@
+declare const Deno: {
+  test(name: string, fn: () => Promise<void> | void): void;
+  readTextFile(path: URL): Promise<string>;
+};
+
+import { toCodeMirrorCompletion } from "../../src/lib/workspace/config-source/completion.ts";
+import { jsonWorkerMessage } from "../../src/lib/workspace/config-source/toolchain-message.ts";
+
+function assert(condition: unknown, message: string): asserts condition {
+  if (!condition) throw new Error(message);
+}
+
+Deno.test("toolchain converts reactive-like proxies to plain Worker messages", async () => {
+  const snapshot = new Proxy(
+    {
+      revision: 1,
+      digest: "sha256:test",
+      entries: {},
+    },
+    {},
+  );
+  const request = {
+    id: 1,
+    kind: "set_snapshot" as const,
+    snapshot,
+  };
+
+  let cloneRejected = false;
+  try {
+    structuredClone(request);
+  } catch (error) {
+    cloneRejected = error instanceof DOMException &&
+      error.name === "DataCloneError";
+  }
+  assert(
+    cloneRejected,
+    "fixture should reproduce the Worker postMessage clone failure",
+  );
+
+  const message = jsonWorkerMessage(request);
+  assert(
+    message.snapshot !== snapshot,
+    "snapshot should be detached from the Proxy",
+  );
+  structuredClone(message);
+
+  const source = await Deno.readTextFile(
+    new URL(
+      "../../src/lib/workspace/config-source/toolchain.ts",
+      import.meta.url,
+    ),
+  );
+  assert(
+    source.includes("const message = jsonWorkerMessage({ ...request, id })") &&
+      source.includes("this.#worker.postMessage(message)"),
+    "ConfigSourceToolchain should normalize every command at the Worker boundary",
+  );
+  const workerSource = await Deno.readTextFile(
+    new URL(
+      "../../src/lib/workspace/config-source/toolchain.worker.ts",
+      import.meta.url,
+    ),
+  );
+  assert(
+    workerSource.includes("set_schema_bundle(request.schemaBundle)"),
+    "Config Source worker should install the WorkspaceConfigSchema global contract",
+  );
+});
+
+Deno.test("toolchain adapts WASM completion items and byte offsets for CodeMirror", () => {
+  const source = "let 名 = tru";
+  const result = toCodeMirrorCompletion(source, {
+    from: new TextEncoder().encode("let 名 = ").length,
+    items: [
+      {
+        label: "true",
+        kind: "constant",
+        detail: "Bool",
+        priority: 20,
+      },
+    ],
+  });
+
+  assert(result !== null, "WASM completion should produce a CodeMirror result");
+  assert(
+    result.from === "let 名 = ".length,
+    "byte offsets should become UTF-16 offsets",
+  );
+  assert(
+    result.options.length === 1,
+    "WASM items should become CodeMirror options",
+  );
+  assert(
+    result.options[0].label === "true",
+    "completion label should be preserved",
+  );
+  assert(
+    result.options[0].type === "constant",
+    "completion kind should become the icon type",
+  );
+  assert(
+    result.options[0].detail === "Bool",
+    "completion detail should be preserved",
+  );
+  assert(
+    result.options[0].boost === 20,
+    "completion priority should become its boost",
+  );
+});