chore: import upstream snapshot with attribution

tests/unit/model-alias-seed.test.ts

@@ -0,0 +1,75 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+
+const TEST_DATA_DIR = fs.mkdtempSync(path.join(os.tmpdir(), "omniroute-alias-seed-"));
+process.env.DATA_DIR = TEST_DATA_DIR;
+
+const core = await import("../../src/lib/db/core.ts");
+const modelsDb = await import("../../src/lib/db/models.ts");
+const sseModelService = await import("../../src/sse/services/model.ts");
+const { DEFAULT_MODEL_ALIAS_SEED, seedDefaultModelAliases } =
+  await import("../../src/lib/modelAliasSeed.ts");
+
+async function resetStorage() {
+  core.resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
+  fs.mkdirSync(TEST_DATA_DIR, { recursive: true });
+}
+
+test.beforeEach(async () => {
+  await resetStorage();
+});
+
+test.after(async () => {
+  core.resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
+});
+
+test("default model alias seed writes missing aliases and is idempotent", async () => {
+  const first = await seedDefaultModelAliases();
+  const aliases = await modelsDb.getModelAliases();
+
+  assert.deepEqual(first.failed, []);
+  assert.equal(first.applied.length, Object.keys(DEFAULT_MODEL_ALIAS_SEED).length);
+  assert.equal(aliases["gemini-3-pro-high"], "agy/gemini-3.1-pro-high");
+  assert.equal(aliases["gemini-3-pro-low"], "agy/gemini-3.1-pro-low");
+  assert.equal(aliases["gemini-3-pro-preview"], "agy/gemini-pro-agent");
+  assert.equal(aliases["gemini-3.1-pro-preview"], "agy/gemini-pro-agent");
+  assert.equal(aliases["gemini-3-flash-preview"], "agy/gemini-3.5-flash-medium");
+
+  const routed = await sseModelService.getModelInfo("gemini-3-pro-high");
+  assert.deepEqual(routed, {
+    provider: "agy",
+    model: "gemini-3.1-pro-high",
+    extendedContext: false,
+  });
+
+  const second = await seedDefaultModelAliases();
+  assert.equal(second.applied.length, 0);
+  assert.equal(second.failed.length, 0);
+  assert.equal(second.skipped.length, Object.keys(DEFAULT_MODEL_ALIAS_SEED).length);
+});
+
+test("default model alias seed preserves existing aliases and skips invalid entries", async () => {
+  await modelsDb.setModelAlias("gemini-3-pro-high", "custom/provider-model");
+
+  const warnings = [];
+  const result = await seedDefaultModelAliases({
+    logger: {
+      warn: (message) => warnings.push(String(message)),
+    },
+    seedMap: {
+      ...DEFAULT_MODEL_ALIAS_SEED,
+      "broken-entry": null,
+    },
+  });
+  const aliases = await modelsDb.getModelAliases();
+
+  assert.equal(aliases["gemini-3-pro-high"], "custom/provider-model");
+  assert.ok(result.skipped.includes("gemini-3-pro-high"));
+  assert.ok(result.failed.includes("broken-entry"));
+  assert.ok(warnings.some((message) => message.includes("broken-entry")));
+});