fix

src/bun.js/test/expect.zig

@@ -2455,12 +2455,16 @@ pub const Expect = struct {
         var return_value_from_function: JSValue = .zero;
 
         if (!value.jsType().isFunction()) {
-            if (this.flags.promise != .none) {
-                if (value.isAnyError()) {
-                    return .{ value, return_value_from_function };
-                } else {
-                    return .{ null, return_value_from_function };
-                }
+            switch (this.flags.promise) {
+                .none => {},
+                .rejects => return .{ value, return_value_from_function },
+                .resolves => {
+                    if (value.isAnyError()) {
+                        return .{ value, return_value_from_function };
+                    } else {
+                        return .{ null, return_value_from_function };
+                    }
+                },
             }
 
             return globalThis.throw("Expected value must be a function", .{});

test/regression/issue/014076.test.ts

@@ -17,3 +17,27 @@ test("resolves not toThrow", async () => {
   await expect(Promise.resolve(new Error("abc"))).resolves.toThrow("abc");
   await expect(Promise.reject(new Error("abc"))).rejects.toThrow("abc");
 });
+
+test("doesn't break rejects", () => {
+  expect(
+    (async () => {
+      throw new DOMException("123");
+    })(),
+  ).rejects.toThrow("123");
+});
+
+test("doesn't break rejects null", () => {
+  expect(
+    (async () => {
+      throw null;
+    })(),
+  ).rejects.toThrow();
+});
+
+test("resolves null doesn't throw", () => {
+  expect(
+    (async () => {
+      return null;
+    })(),
+  ).resolves.not.toThrow();
+});