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Add KIterable.averageBy tests #35

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Dec 21, 2018
Merged

Add KIterable.averageBy tests #35

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18 changes: 18 additions & 0 deletions test/collection/iterable_extensions_test.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -119,6 +119,24 @@ void testIterable(KIterable<T> Function<T>() emptyIterable,
});
});

group('average', () {
test("average of ints", () {
final ints = iterableOf([1, 2, 3, 4]);
var result = ints.averageBy((it) => it);
expect(result, equals(2.5));
});
test("average of empty is NaN", () {
final ints = emptyIterable();
var result = ints.averageBy((it) => it);
expect(identical(result, double.nan), isTrue);
});
test("average of nums", () {
final ints = iterableOf([1, 2.0, 3, 4]);
var result = ints.averageBy((it) => it);
expect(result, equals(2.5));
});
});

group("distinct", () {
if (ordered) {
test("distinct elements", () {
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