Handle case where the RequestInit object body is null

src/extractMethodAndBodyFromRequestInitObject.ts

@@ -10,19 +10,21 @@ export function extractMethodAndBodyFromRequestInitObject(
   let originalBody = "{}";
 
   if (init) {
-    if (typeof init.body !== "string") {
-      throw new Error(
-        "Sorry Denock only support stringified JSON as body in RequestInit object",
-      );
-    }
-
     originalMethod = init.method ? init.method.toUpperCase() : originalMethod;
 
     if (!acceptedMethods.includes(originalMethod)) {
       throw new Error("Sorry Denock does not support this method");
     }
 
-    originalBody = init.body;
+    if (init.body) {
+      if (typeof init.body !== "string") {
+        throw new Error(
+          "Sorry Denock only support stringified JSON as body in RequestInit object",
+        );
+      }
+
+      originalBody = init.body;
+    }
   }
 
   return {

src/test.ts

@@ -171,3 +171,29 @@ Deno.test(
     assertEquals(status, 201);
   },
 );
+
+Deno.test(
+  "denock : Should handle when there is no body in the RequestInit object",
+  async () => {
+    denock({
+      method: "GET",
+      protocol: "https",
+      host: "jsonplaceholder.typicode.com",
+      path: "/todos",
+      responseBody: { test: "6" },
+      replyStatus: 200,
+    });
+
+    const urlObject = new URL("https://jsonplaceholder.typicode.com/todos");
+
+    const response = await fetch(urlObject, {
+      method: "GET",
+    });
+
+    const body = await response.json();
+    const status = response.status;
+
+    assertEquals(body, { test: "6" });
+    assertEquals(status, 200);
+  },
+);