add test for cleanOutput

Author: lsmith77

test/generator/plugin-options.test.ts

@@ -0,0 +1,32 @@
+import plugin from "../../src";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { loadSchema } from "../utils";
+import { describe, expect, it } from "vitest";
+
+describe("documentation plugin: plugin options", () => {
+  it("cleanOutput deletes existing files in the output directory before generation", async () => {
+    const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), "doc-plugin-"));
+    // create a stale file that should be removed by cleanOutput
+    fs.writeFileSync(path.join(tmpDir, "stale.txt"), "stale");
+
+    const model = await loadSchema(`
+      model A {
+        id String @id @default(cuid())
+      }
+    `);
+
+    await plugin.generate({
+      defaultOutputPath: tmpDir,
+      model,
+      pluginOptions: { output: tmpDir, cleanOutput: true },
+      schemaFile: "schema.zmodel",
+    });
+
+    // ensure output dir is prepopulated and removed by cleanOutput
+
+    expect(fs.existsSync(path.join(tmpDir, "stale.txt"))).toBe(false);
+    expect(fs.existsSync(path.join(tmpDir, "index.md"))).toBe(true);
+  });
+});