1 files changed, 35 insertions, 0 deletions
diff --git a/tests/js/accretion.mjs b/tests/js/accretion.mjs
new file mode 100644
index 0000000..3ea90c3
--- /dev/null
+++ b/tests/js/accretion.mjs
@@ -0,0 +1,35 @@
+import assert from "node:assert/strict";
+
+import sqlite from "../../src/sqlite.cjs";
+
+import { runTests }          from "../runner.mjs";
+import { promisifyDb, open } from "../../src/db.mjs";
+import { runMigrations }     from "../../src/accretion.mjs";
+
+
+const test_runMigrations = t => {
+	t.start("runMigrations()");
+
+	t.test("running twice is a noop", async () => {
+		const db = await open(":memory:");
+		const migrationsFn = () => db.all("SELECT filename FROM migrations;");
+
+		assert.rejects(
+			migrationsFn,
+			{ message: "SQLITE_ERROR: no such table: migrations" },
+		);
+
+		await runMigrations(db);
+		const filled = await migrationsFn();
+
+		await runMigrations(db);
+		const unchanged = await migrationsFn();
+
+		assert.deepEqual(filled, unchanged);
+	});
+};
+
+
+await runTests([
+	test_runMigrations,
+]);