85 lines
2.5 KiB
Dart
85 lines
2.5 KiB
Dart
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import 'package:platform_collections/platform_collections.dart';
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import 'package:test/test.dart';
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void main() {
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group('Collection', () {
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test('creates a collection from a list', () {
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final collection = Collection([1, 2, 3]);
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expect(collection.all(), equals([1, 2, 3]));
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});
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test('avg calculates the average', () {
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final collection = Collection([1, 2, 3, 4, 5]);
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expect(collection.avg(), equals(3));
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});
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test('chunk splits the collection into smaller collections', () {
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final collection = Collection([1, 2, 3, 4, 5]);
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final chunked = collection.chunk(2);
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expect(
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chunked.map((c) => c.all()),
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equals([
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[1, 2],
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[3, 4],
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[5]
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]));
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});
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test('whereCustom filters the collection', () {
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final collection = Collection([1, 2, 3, 4, 5]);
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final filtered = collection.whereCustom((n) => n % 2 == 0);
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expect(filtered.all(), equals([2, 4]));
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});
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test('mapCustom transforms the collection', () {
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final collection = Collection([1, 2, 3]);
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final mapped = collection.mapCustom((n) => n * 2);
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expect(mapped.all(), equals([2, 4, 6]));
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});
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test('fold reduces the collection', () {
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final collection = Collection([1, 2, 3, 4, 5]);
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final sum = collection.fold<int>(0, (prev, curr) => prev + (curr as int));
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expect(sum, equals(15));
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});
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test('sortCustom sorts the collection', () {
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final collection = Collection([3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5]);
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final sorted = collection.sortCustom((a, b) => a.compareTo(b));
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expect(sorted.all(), equals([1, 1, 2, 3, 3, 4, 5, 5, 5, 6, 9]));
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});
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test('flatten flattens nested collections', () {
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final collection = Collection([
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[1, 2],
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[3, 4],
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[5, 6]
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]);
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final flattened = collection.flatten();
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expect(flattened.all(), equals([1, 2, 3, 4, 5, 6]));
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});
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test('groupBy groups collection items', () {
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final collection = Collection([
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{'name': 'Alice', 'age': 25},
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{'name': 'Bob', 'age': 30},
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{'name': 'Charlie', 'age': 25},
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{'name': 'David', 'age': 30},
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]);
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final grouped = collection.groupBy((item) => item['age']);
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expect(
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grouped,
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equals({
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25: [
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{'name': 'Alice', 'age': 25},
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{'name': 'Charlie', 'age': 25}
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],
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30: [
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{'name': 'Bob', 'age': 30},
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{'name': 'David', 'age': 30}
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]
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}));
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});
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});
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}
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