public void GetInstrumentsByName_ValidId_ReturnsResult()
{
// Arrange
var result = fixture.Create <IEnumerable <Instrument> >();
instrumentRepository.GetInstrumentsByName(Arg.Any <string>()).Returns(result);
// Act
var serviceResult = instrumentService.GetInstrumentsByName("test");
// Assert
Assert.IsNotNull(serviceResult);
Assert.AreEqual(serviceResult.Count(), result.Count());
}