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fix difference calc and add tests (#9950)

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Fixes a whoopsie in the difference function and adds tests at the same
time.
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Thomas Heartman 2025-05-09 17:47:52 +02:00 committed by GitHub
parent 278421a1c8
commit fbc58ca1fc
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2 changed files with 18 additions and 3 deletions
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15
frontend/src/component/feature/FeatureStrategy/FeatureStrategyConstraints/useEditableConstraint/set-functions.test.ts Normal file
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@ -0,0 +1,15 @@
import { difference, union } from './set-functions';
test('union', () => {
const a = [1, 2];
const b = new Set([2, 3]);
const c = union(a, b);
expect([...c]).toEqual([1, 2, 3]);
});
test('difference', () => {
const a = [1, 2];
const b = new Set([2, 3]);
const c = difference(a, b);
expect([...c]).toEqual([1]);
});

6
frontend/src/component/feature/FeatureStrategy/FeatureStrategyConstraints/useEditableConstraint/set-functions.ts
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@ -6,7 +6,7 @@
// todo: replace the use of this methods with set.union and set.difference when // todo: replace the use of this methods with set.union and set.difference when
// it's available. // it's available.
export const union = <T>(a: Iterable<T>, b: Set<T>) => { export const union = <T>(a: Iterable<T>, b: Set<T>): Set<T> => {
const result = new Set(a); const result = new Set(a);
for (const element of b) { for (const element of b) {
result.add(element); result.add(element);
@ -14,8 +14,8 @@ export const union = <T>(a: Iterable<T>, b: Set<T>) => {
return result; return result;
}; };
export const difference = <T>(a: Iterable<T>, b: Set<T>) => { export const difference = <T>(a: Iterable<T>, b: Set<T>): Set<T> => {
const result = new Set(a); const result = new Set<T>();
for (const element of a) { for (const element of a) {
if (!b.has(element)) { if (!b.has(element)) {
result.add(element); result.add(element);