diff --git a/packages/lib/src/utils/__tests__/getConditionalClasses.test.ts b/packages/lib/src/utils/__tests__/getConditionalClasses.test.ts
new file mode 100644
index 0000000..d5be7b8
--- /dev/null
+++ b/packages/lib/src/utils/__tests__/getConditionalClasses.test.ts
@@ -0,0 +1,47 @@
+import { getConditionalClasses } from "../getConditionalClasses";
+
+describe("getConditionalClasses", () => {
+  it("should return an empty object if there are no conditions", () => {
+    const theme = { conditionals: undefined };
+
+    const result = getConditionalClasses({ theme });
+
+    expect(result).toEqual({});
+  });
+
+  it("should return empty object if conditons are not met", () => {
+    const modifiers = ["floating"];
+    const theme = {
+      conditionals: [
+        {
+          modifiers: "block", // Modifier conditions match defaults above as a string
+          classes: {
+            root: "!bg-green-500",
+          },
+        },
+      ],
+    };
+
+    const result = getConditionalClasses({ theme, modifiers });
+
+    expect(result).toEqual({ root: "!bg-green-500" });
+  });
+
+  it("should return correct classes if conditons are met", () => {
+    const modifiers = ["block"];
+    const theme = {
+      conditionals: [
+        {
+          modifiers: "block", // Modifier conditions match defaults above as a string
+          classes: {
+            root: "!bg-green-500",
+          },
+        },
+      ],
+    };
+
+    const result = getConditionalClasses({ theme, modifiers });
+
+    expect(result).toEqual({ root: "!bg-green-500" });
+  });
+});