fix: support null values in matchers

src/dsl/matchers.spec.ts

@@ -618,6 +618,23 @@ describe("Matcher", () => {
  })
  })
 
+ describe("when given an object with null values", () => {
+ const object = {
+ some: "data",
+ more: null,
+ an: [null],
+ someObject: {
+ withData: true,
+ withNumber: 1,
+ andNull: null,
+ },
+ }
+
+ it("returns just that object", () => {
+ expect(extractPayload(object)).to.deep.eql(object)
+ })
+ })
+
  describe("when given an object with some matchers", () => {
  const someMatchers = {
  some: somethingLike("data"),

src/dsl/matchers.ts

@@ -296,7 +296,7 @@ export function extractPayload(value: any): any {
  return value.map(extractPayload)
  }
 
- if (typeof value === "object") {
+ if (value !== null && typeof value === "object") {
  return Object.keys(value).reduce(
  (acc: object, propName: string) => ({
  ...acc,