Invercargill/src/tests/Integration/Cache.vala

using Invercargill;
using Invercargill.Convert;

void cache_tests() {


    Test.add_func("/invercargill/operator/cache", () => {
        var runs = 0;
        var enumerable = range(0, 64).act(() => runs++).cache().assert_promotion<SignedNativeIntegers>();

        var count = enumerable.count();
        var min = enumerable.min();
        var max = enumerable.max();
        var average = enumerable.average();

        assert_cmpint(64, CompareOperator.EQ, count);
        assert_cmpint(0, CompareOperator.EQ, min);
        assert_cmpint(63, CompareOperator.EQ, max);
        assert_cmpint(31, CompareOperator.EQ, average);

        assert_cmpint(64, CompareOperator.EQ, runs);
    });

    Test.add_func("/invercargill/cache/once", () => {
        
        var runs = 0;
        CachedGet<int> func = () => once<int>(() => ++runs);

        var enumerable = range(0, 64).select<int>(i => func()).to_vector();
        
        assert_cmpint(1, CompareOperator.EQ, runs);
        assert_true(enumerable.all(i => i == 1));

    });

}