public void TestObjectFilters()
{
QueryInjector.RegisterGlobal(
ib => ib.WhenEncountering <IQueryable <Student> >().ReplaceWith(students => students.Where(student => !student.Deleted))
);
var collection = new[]
{
new Student {
Deleted = false
},
new Student {
Deleted = true
},
new Student {
Deleted = false
},
new Student {
Deleted = true
},
new Student {
Deleted = false
},
}.AsQueryable();
var actualQuery = collection.AsInjectableQueryable() as IInjectableQueryable;
var expected = collection.Where(student => !student.Deleted);
Assert.NotNull(actualQuery);
ExpressionEqualityComparer.AssertExpressionsEqual(expected.Expression, actualQuery.GetInjectedExpression());
}
public void TestBasicInjectionString()
{
Expression <Func <IQueryable <string>, IQueryable <string> > > replaceExpr = s => new[] { "replaced!" }.AsQueryable();
QueryInjector.RegisterGlobal(
ib => ib.WhenEncountering <IQueryable <string> >().ReplaceWith(replaceExpr)
);
var actualQuery = new[] { "a", "b", "c" }.AsInjectableQueryable() as IInjectableQueryable;
Assert.NotNull(actualQuery);
ExpressionEqualityComparer.AssertExpressionsEqual(replaceExpr.Body, actualQuery.GetInjectedExpression());
}
public void TestBasicInjectionOnWhereInt()
{
QueryInjector.RegisterGlobal(
ib => ib.WhenEncountering <IQueryable <int> >().ReplaceWith(q => q.Where(i => i % 2 == 0))
);
var collection = new[] { 1, 2, 3, 4, 5 }.AsQueryable();
var actualQuery = collection.Where(i => i > 3).AsInjectableQueryable() as IInjectableQueryable;
var expected = collection.Where(i => i % 2 == 0).Where(i => i > 3);
Assert.NotNull(actualQuery);
ExpressionEqualityComparer.AssertExpressionsEqual(expected.Expression, actualQuery.GetInjectedExpression());
}
public void TestBasicInjectionStringLiteral()
{
Expression <Func <string, string> > replaceExpr = s => "rob";
QueryInjector.RegisterGlobal(
ib => ib.WhenEncountering <string>().ReplaceWith(replaceExpr)
);
var initialCollection = new[] { "a", "b", "c" }.AsQueryable();
var actualQuery = initialCollection.Where(s => s == "rob").AsInjectableQueryable() as IInjectableQueryable;
//We need to write it this way, because .Where(s => "rob" == "rob") is optimised into .Where(s => true)
var expression = Expression.Lambda <Func <string, bool> >(Expression.Equal(Expression.Constant("rob"), Expression.Constant("rob")), Expression.Parameter(typeof(string), "s"));
var expectedQuery = initialCollection.Where(expression);
Assert.NotNull(actualQuery);
ExpressionEqualityComparer.AssertExpressionsEqual(expectedQuery.Expression, actualQuery.GetInjectedExpression());
}
public void TestInjectionParameter()
{
var initialCollection = new[] { 1, 2, 3 }.AsQueryable();
QueryInjector.RegisterGlobal(
ib => ib.WhenEncountering <IQueryable <int> >().ReplaceWith(collection => collection.Where(c => c == Inject <int> .Value("testKey")))
);
var actualQuery =
initialCollection
.AsInjectableQueryable()
.InjectWith("testKey", 5)
as IInjectableQueryable;
var expected = initialCollection.Where(c => c == 5);
Assert.NotNull(actualQuery);
ExpressionEqualityComparer.AssertExpressionsEqual(expected.Expression, actualQuery.GetInjectedExpression());
}
public void Setup()
{
QueryInjector.ClearGlobals();
}