diff --git a/packages/string-templates/test/javascript.spec.js b/packages/string-templates/test/javascript.spec.js
new file mode 100644
index 0000000000..30ce9bbd60
--- /dev/null
+++ b/packages/string-templates/test/javascript.spec.js
@@ -0,0 +1,73 @@
+const { processStringSync, encodeJSBinding } = require("../src/index.cjs")
+
+const processJS = (js, context) => {
+  return processStringSync(encodeJSBinding(js), context)
+}
+
+describe("Test the JavaScript helper", () => {
+  it("should execute a simple expression", () => {
+    const output = processJS(`return 1 + 2`)
+    expect(output).toBe("3")
+  })
+
+  it("should be able to use primitive bindings", () => {
+    const output = processJS(`return $("foo")`, {
+      foo: "bar",
+    })
+    expect(output).toBe("bar")
+  })
+
+  it("should be able to use an object binding", () => {
+    const output = processJS(`return $("foo").bar`, {
+      foo: {
+        bar: "baz",
+      },
+    })
+    expect(output).toBe("baz")
+  })
+
+  it("should be able to use a complex object binding", () => {
+    const output = processJS(`return $("foo").bar[0].baz`, {
+      foo: {
+        bar: [
+          {
+            baz: "shazbat",
+          },
+        ],
+      },
+    })
+    expect(output).toBe("shazbat")
+  })
+
+  it("should be able to use a deep binding", () => {
+    const output = processJS(`return $("foo.bar.baz")`, {
+      foo: {
+        bar: {
+          baz: "shazbat",
+        },
+      },
+    })
+    expect(output).toBe("shazbat")
+  })
+
+  it("should be able to use a deep array binding", () => {
+    const output = processJS(`return $("foo.0.bar")`, {
+      foo: [
+        {
+          bar: "baz",
+        },
+      ],
+    })
+    expect(output).toBe("baz")
+  })
+
+  it("should handle errors", () => {
+    const output = processJS(`throw "Error"`)
+    expect(output).toBe("Error while executing JS")
+  })
+
+  it("should timeout after one second", () => {
+    const output = processJS(`while (true) {}`)
+    expect(output).toBe("Error while executing JS")
+  })
+})