chore: add sample test

test/everything/everything.ts

@@ -1,3 +1,36 @@
-import Everything from "https://gir.deno.dev/Everything-1.0";
+// import Everything from "https://gir.deno.dev/Everything-1.0";
 
-console.log("Everything", Everything);
+import { require } from "../../mod.ts";
+import { assertEquals } from "../test_deps.ts";
+
+const Everything = require("Everything", "1.0");
+
+interface GIType {
+  name: string;
+  type:
+    | "bigint"
+    | "boolean"
+    | "function"
+    | "number"
+    | "object"
+    | "string"
+    | "symbol"
+    | "undefined";
+  value: unknown;
+}
+
+const types: GIType[] = [
+  {
+    name: "filename",
+    type: "string",
+    value: "hello",
+  },
+];
+
+for (const { name, type, value } of types) {
+  Deno.test(`const_return_${name}`, () => {
+    const value = Everything[`const_return_${name}`]();
+
+    assertEquals(typeof value, type, `has incorrect return type`);
+  });
+}

test/everything/meson.build

@@ -35,8 +35,8 @@ test(
   'everything',
   deno,
   args: [
-    'run',
-    '-A',
+    'test',
+    '--allow-ffi',
     '--unstable-ffi',
     files('everything.ts')
   ],