feat: gatsby source medusa (#924)

packages/gatsby-source-medusa/__tests__/process-node.test.ts

@@ -0,0 +1,20 @@
+const { processNode } = require("../src/process-node.ts");
+
+describe("helper functions", () => {
+  it("should return return a new node from processNode", () => {
+    const fieldName = "product";
+    const node = {
+      id: "prod_test_1234",
+      title: "Test Shirt",
+      description: "A test product",
+      unit_price: 2500,
+    };
+
+    const createContentDigest = jest.fn(() => "digest_string");
+    const processNodeResult = processNode(node, fieldName, createContentDigest);
+
+    expect(createContentDigest).toBeCalled();
+
+    expect(processNodeResult).toMatchSnapshot();
+  });
+});