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incorrect result when $map($, $append(?)) #86
Description
write to simpe test close to my code
@Test
public void testTransform() throws IOException {
Object answer = Json.parseJson("{\"systems\": \"asd2\"}");
var expression = Jsonata.jsonata("{'systems': 'asd2'}.$map($, $append(?))");
Object evaluate = expression.evaluate(null);
Assertions.assertEquals(answer, evaluate);
}
@Test
public void testTransform2() {
Object answer = Json.parseJson("{\"systems\": \"asd\"}");
var expression = Jsonata.jsonata("$map($, $append(?))");
Object evaluate = expression.evaluate(answer);
Assertions.assertEquals(answer, evaluate);
}
both failed with error
org.opentest4j.AssertionFailedError:
Expected :{systems=asd2}
Actual :[{systems=asd2}, 0]
org.opentest4j.AssertionFailedError:
Expected :{systems=asd}
Actual :[{systems=asd}, 0]
https://try.jsonata.org/ return result
first test
second test
Activity
aeberhart commentedon Feb 28, 2026
I think the root cause if the we re-use the base function. This explains the test case result which is the same as for this expression: {'systems': 'asd2'}.$map($, $append)
aeberhart commentedon Nov 5, 2026
Fixed on main by #132: as in jsonata-js, only
?leaves a parameter unbound when partially applying a function, so$map($, $append(?))now returns the expected result. Covered bytestMapWithAppend/testMapWithAppend2inOldPrsTest.