diff --git a/test/generate.test.ts b/test/generate.test.ts
new file mode 100644
index 0000000..1ebf81f
--- /dev/null
+++ b/test/generate.test.ts
@@ -0,0 +1,41 @@
+import { createGenerator, presetUno } from "unocss";
+import { describe, expect, it } from "vitest";
+import { presetPalette } from "../src";
+describe("generate test", () => {
+  it("generate prelights", async () => {
+    const uno = createGenerator({
+      presets: [
+        presetPalette({
+          themeColors: {
+            primary: "rgb(255,0,0)"
+          }
+        })
+      ]
+    });
+    const { css } = await uno.generate("bg-primary");
+    expect(css).toMatchInlineSnapshot(`
+      "/* layer: palette */
+      :root{--un-platte-primary-color-rgb:255 0 0;--un-platte-primary-color:rgb(var(--un-platte-primary-color-rgb));}"
+    `);
+  });
+
+  it("generate", async () => {
+    const uno = createGenerator({
+      presets: [
+        presetPalette({
+          themeColors: {
+            primary: "rgb(255,0,0)"
+          }
+        }),
+        presetUno()
+      ]
+    });
+    const { css } = await uno.generate("bg-primary", {
+      preflights: false
+    });
+    expect(css).toMatchInlineSnapshot(`
+      "/* layer: default */
+      .bg-primary{--un-bg-opacity:1;background-color:rgb(var(--un-platte-primary-color-rgb) / var(--un-bg-opacity));}"
+    `);
+  });
+});