fix: composer not being recognized as valid middleware for default ha…

…ndler (#59)

* fix: composer not being recognized as middleware

* fix: utils tests filename

* add: test for Composer[]

src/utils/checks.ts

@@ -1,4 +1,4 @@
-import { Context, Middleware } from "../deps.deno.ts";
+import { Composer, Context, Middleware } from "../deps.deno.ts";
 import { CommandOptions } from "../types.ts";
 import { MaybeArray } from "./array.ts";
 
@@ -12,6 +12,7 @@ export function isMiddleware<C extends Context = Context>(
   obj: unknown,
 ): obj is MaybeArray<Middleware<C>> {
   if (!obj) return false;
+  if (obj instanceof Composer) return true;
   if (Array.isArray(obj)) return obj.every(isMiddleware);
   const objType = typeof obj;
 

test/utils-test.test.ts

@@ -0,0 +1,27 @@
+import { isMiddleware } from "../src/utils/checks.ts";
+import { CommandsFlavor } from "../src/context.ts";
+import { CommandGroup, commandNotFound } from "../src/mod.ts";
+import { dummyCtx } from "./context.test.ts";
+import {
+  assert,
+  assertEquals,
+  assertFalse,
+  Context,
+  describe,
+  it,
+} from "./deps.test.ts";
+import { Composer } from "../src/deps.deno.ts";
+
+describe("Utils tests", () => {
+  describe("isMiddleware", () => {
+    it("Composer", () => {
+      const composer = new Composer();
+      assert(isMiddleware(composer));
+    });
+    it("Composer[]", () => {
+      const a = new Composer();
+      const b = new Composer();
+      assert(isMiddleware([a, b]));
+    });
+  });
+});