From 6abc8c3497c440dfac66336a50fd6f56efc38bac Mon Sep 17 00:00:00 2001
From: Homa Wong <homawong@gmail.com>
Date: Sat, 8 Oct 2022 04:25:41 -0700
Subject: [PATCH] fix: handles function-object

fixes #228
---
 ts/createSatisfier.ts | 8 ++++++++
 ts/satisfies.spec.ts  | 4 ++++
 2 files changed, 12 insertions(+)

diff --git a/ts/createSatisfier.ts b/ts/createSatisfier.ts
index ef0cb10..143c3dd 100644
--- a/ts/createSatisfier.ts
+++ b/ts/createSatisfier.ts
@@ -85,12 +85,20 @@ function diff(expected: any, actual: any, path: Diff['path'] = [], _index?: numb
   }
 
   if (expectedType === 'function') {
+    if (Object.keys(expected).length > 0) {
+      const ro = diffObject(expected, actual, path, _index)
+      if (ro.length === 0) return ro
+    }
     const r = (expected as Predicate)(actual, path)
     if (r === true) return noDiff
     return r ? r : [{ path, expected, actual }]
   }
 
   // expected is an object
+  return diffObject(expected, actual, path, _index)
+}
+
+function diffObject(expected: any, actual: any, path: Diff['path'] = [], _index?: number): Diff[] {
   if (actual === undefined || actual === null) {
     return [{ path, expected, actual }]
   }
diff --git a/ts/satisfies.spec.ts b/ts/satisfies.spec.ts
index 60abe05..d9a9c1b 100644
--- a/ts/satisfies.spec.ts
+++ b/ts/satisfies.spec.ts
@@ -39,6 +39,10 @@ describe('when actual is object', () => {
   test('deep expected property can be predicate', () => {
     expect(satisfies({ a: { b: 'foo' } }, { a: { b: v => v === 'foo' } })).toBe(true)
   })
+
+  it.only('works with function-object', () => {
+    expect(satisfies({ a: 1 }, Object.assign(() => { }, { a: 1 }))).toBe(true)
+  })
 })
 
 describe('when actual is array', () => {