initial commit

src/config.test.ts

@@ -0,0 +1,95 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { mkdtemp, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { loadWebSearchConfig, WebSearchConfigError } from "./config.ts";
+
+async function writeTempConfig(contents: unknown) {
+  const dir = await mkdtemp(join(tmpdir(), "pi-web-search-config-"));
+  const file = join(dir, "web-search.json");
+  const body = typeof contents === "string" ? contents : JSON.stringify(contents, null, 2);
+  await writeFile(file, body, "utf8");
+  return file;
+}
+
+test("loadWebSearchConfig returns a normalized default provider and provider lookup", async () => {
+  const file = await writeTempConfig({
+    defaultProvider: "exa-main",
+    providers: [
+      {
+        name: "exa-main",
+        type: "exa",
+        apiKey: "exa-test-key",
+        options: {
+          defaultSearchLimit: 7,
+          defaultFetchTextMaxCharacters: 9000,
+        },
+      },
+    ],
+  });
+
+  const config = await loadWebSearchConfig(file);
+
+  assert.equal(config.defaultProviderName, "exa-main");
+  assert.equal(config.defaultProvider.name, "exa-main");
+  assert.equal(config.providersByName.get("exa-main")?.apiKey, "exa-test-key");
+  assert.equal(config.providers[0]?.options?.defaultSearchLimit, 7);
+});
+
+test("loadWebSearchConfig normalizes a Tavily default with Exa fallback", async () => {
+  const file = await writeTempConfig({
+    defaultProvider: "tavily-main",
+    providers: [
+      {
+        name: "tavily-main",
+        type: "tavily",
+        apiKey: "tvly-test-key",
+      },
+      {
+        name: "exa-fallback",
+        type: "exa",
+        apiKey: "exa-test-key",
+      },
+    ],
+  });
+
+  const config = await loadWebSearchConfig(file);
+
+  assert.equal(config.defaultProviderName, "tavily-main");
+  assert.equal(config.defaultProvider.type, "tavily");
+  assert.equal(config.providersByName.get("exa-fallback")?.type, "exa");
+});
+
+test("loadWebSearchConfig rejects a missing default provider target", async () => {
+  const file = await writeTempConfig({
+    defaultProvider: "missing",
+    providers: [
+      {
+        name: "exa-main",
+        type: "exa",
+        apiKey: "exa-test-key",
+      },
+    ],
+  });
+
+  await assert.rejects(
+    () => loadWebSearchConfig(file),
+    (error) =>
+      error instanceof WebSearchConfigError &&
+      /defaultProvider \"missing\"/.test(error.message),
+  );
+});
+
+test("loadWebSearchConfig rejects a missing file with a helpful example message", async () => {
+  const file = join(tmpdir(), "pi-web-search-does-not-exist.json");
+
+  await assert.rejects(
+    () => loadWebSearchConfig(file),
+    (error) =>
+      error instanceof WebSearchConfigError &&
+      error.message.includes(file) &&
+      error.message.includes('"defaultProvider"') &&
+      error.message.includes('"providers"'),
+  );
+});