add collection fonction to the delegate

src/assertion.ts

@@ -33,8 +33,7 @@ const aliasMethodHook = (methodName: string) => function (...args) {
 };
 
 const unbindAssert = (target: Assert): { [p: string]: (...args) => any } => Object.fromEntries(
-    Object
-        .keys(AssertPrototype)
+    [...Object.keys(AssertPrototype), 'collect']
         .map((methodName) => [methodName, (...args) => target[methodName](...args)])
 );
 
@@ -172,19 +171,19 @@ export const assert = (collect, offset: number, runOnly = false): Assert => {
     return {
         ...unbindAssert(Object.create(AssertPrototype, {collect: {value: actualCollect}})),
         test(description, spec, opts = {}) {
-        if (runOnly) {
-            return skip(description, spec, opts);
-        }
-        return test(description, spec, opts);
-    },
+            if (runOnly) {
+                return skip(description, spec, opts);
+            }
+            return test(description, spec, opts);
+        },
         skip(description: string, spec = noop, opts = {}) {
-        return skip(description, spec, opts);
-    },
+            return skip(description, spec, opts);
+        },
         only(description: string, spec, opts = {}) {
-        const specFn = runOnly === false ? _ => {
-            throw new Error(`Can not use "only" method when not in run only mode`);
-        } : spec;
-        return test(description, specFn, opts);
-    }
+            const specFn = runOnly === false ? _ => {
+                throw new Error(`Can not use "only" method when not in run only mode`);
+            } : spec;
+            return test(description, specFn, opts);
+        }
     };
 };