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fix(stream-transform): preserve objects with a non-callable then field #527

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Merged
wdavidw merged 1 commit into from
Oct 11, 2026
Merged

fix(stream-transform): preserve objects with a non-callable then field #527

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2 changes: 1 addition & 1 deletion packages/stream-transform/lib/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@ Transformer.prototype._transform = function (chunk, _, cb) {
if (l === 1) {
// sync
const result = this.handler.call(this, chunk, this.options.params);
if (result && result.then) {
if (result && typeof result.then === "function") {
result.then(
(result) => {
this.__done(null, [result], cb);
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10 changes: 5 additions & 5 deletions packages/stream-transform/test/handler.types.js
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Original file line number Diff line number Diff line change
Expand Up @@ -40,24 +40,24 @@ describe("handler.types", function () {
);
});

it("receive string and return object", function (next) {
it("receive string and return object with a then field", function (next) {
transform(
["20322-051544", "28392-898392", "83929-843999"],
(record) => {
record.should.not.be.an.Array;
const [value_1, value_2] = record.split("-");
record = {
FIELD_1: value_1,
FIELD_2: value_2,
then: value_2,
};
return record;
},
(err, data) => {
if (err) return next(err);
data.should.eql([
{ FIELD_1: "20322", FIELD_2: "051544" },
{ FIELD_1: "28392", FIELD_2: "898392" },
{ FIELD_1: "83929", FIELD_2: "843999" },
{ FIELD_1: "20322", then: "051544" },
{ FIELD_1: "28392", then: "898392" },
{ FIELD_1: "83929", then: "843999" },
]);
next();
},
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