Add R2 storage contracts

cloudflare/tests/api_controls.test.ts

@@ -103,6 +103,7 @@ function testEnv(options: TestEnvOptions = {}): Env {
         return Promise.resolve(values.get(key) ?? null);
       },
     },
+    ELY_STORAGE: testR2Bucket(),
     ELY_RATE_LIMITER: {
       limit(input: { key: string }): Promise<{ success: boolean }> {
         options.rateLimitKeys?.push(input.key);
@@ -119,6 +120,21 @@ function testEnv(options: TestEnvOptions = {}): Env {
   };
 }
 
+function testR2Bucket(): Env["ELY_STORAGE"] {
+  return {
+    get() {
+      return Promise.resolve(null);
+    },
+    put() {
+      return Promise.resolve({
+        arrayBuffer() {
+          return Promise.resolve(new ArrayBuffer(0));
+        },
+      });
+    },
+  };
+}
+
 function testD1Database(): Env["ELY_DB"] {
   return {
     prepare() {