private void VerifyQuery <TClient, TClientResult, TResult>(Func <IQueryable <TClient>, IQueryable <TClientResult> > clientQueryTransform, Func <IQueryable <A>, IQueryable <TResult> > expectedTransform, bool requireNonEmpty = true)
{
var comparer = GetComparer <TResult>();
var translated = new LinqToODataTranslator().Translate(clientQueryTransform(Empty <TClient> .Array.AsQueryable()).Expression, out var rootQuery, out var resultTranslator);
Assert.That(translated, Is.InstanceOf <ODataQueryExpression>());
Assert.That(rootQuery, Is.InstanceOf <IQueryable <TClient> >());
var random = new Random(123456);
var wasNonEmpty = false;
for (var i = 0; i < 10; ++i)
{
var randomQuery = this.RandomQueryable(random);
var transformed = expectedTransform(randomQuery);
var expected = transformed.ToArray();
wasNonEmpty |= expected.Any();
Console.WriteLine("original = " + transformed);
Console.WriteLine("odata = " + HttpUtility.UrlDecode(translated.ToString()));
var rawApplied = ODataQueryFilter.Apply(randomQuery, ODataQueryParser.Parse(randomQuery.ElementType, translated.ToString()), out var inlineCountQuery);
var applied = (IEnumerable <TResult>)resultTranslator(rawApplied, null);
Console.WriteLine("applied = " + rawApplied);
applied.ToArray().CollectionShouldEqual(expected, comparer: comparer, orderMatters: true);
Console.WriteLine(new string('-', 80));
}
if (requireNonEmpty)
{
wasNonEmpty.ShouldEqual(true, "At least 1 run should produce non-empty results!");
}
}
private void TestFilterQuery(string filter, string orderBy, string skip, string top, int[] expectedIds)
{
var query = ODataQueryParser.Parse(typeof(A), new NameValueCollection {
{ "$filter", filter }, { "$orderby", orderBy }, { "$skip", skip }, { "$top", top }
});
var results = ODataQueryFilter.Apply(this._records, query, out var inlineCountQuery);
results.Select(a => a.Id).CollectionShouldEqual(expectedIds, orderMatters: true);
var equivalentToInlineCountResults = ODataQueryFilter.Apply(this._records, query.Update(top: null, skip: 0), out _);
inlineCountQuery.Select(a => a.Id).CollectionShouldEqual(equivalentToInlineCountResults.Select(a => a.Id));
}