public void GetSqlDataReader_GivenCachedCommand_ReturnsCachedResult()
{
// arrange
var expected = new MockDataReader();
var storeMock = new Mock<IBackingStore>();
storeMock
.Setup(x => x.ContainsKey(It.IsAny<string>()))
.Returns(true);
storeMock
.Setup(x => x.Get(It.IsAny<string>()))
.Returns(expected);
var sut = new NonExpiringCache(storeMock.Object);
// act
var actual = sut.GetDataReader(new SqlCommand(), () => new MockDataReader());
// assert
Assert.That(actual, Is.SameAs(expected));
storeMock.Verify(
x => x.Get(It.IsAny<string>()),
Times.Once());
}
public void GetSqlDataReader_GivenNullQuery_ThrowsException()
{
// arrange
var sut = new NonExpiringCache(Mock.Of<IBackingStore>());
// assert
Assert.Throws<ArgumentNullException>(() => sut.GetDataReader(new SqlCommand(), null));
}
public void GetSqlDataReader_GivenCommand_ChecksBackingStore()
{
// arrange
var storeMock = new Mock<IBackingStore>();
storeMock
.Setup(x => x.ContainsKey(It.IsAny<string>()))
.Returns(true);
var sut = new NonExpiringCache(storeMock.Object);
// act
sut.GetDataReader(new SqlCommand(), () => new MockDataReader());
// assert
storeMock.Verify(
x => x.ContainsKey(It.IsAny<string>()),
Times.Once());
}
public void GetSqlDataReader_GivenNonCachedCommand_CallsQueryAndReturnsResult()
{
// arrange
var queryWasCalled = false;
var expected = new MockDataReader();
Func<DbDataReader> query = () => { queryWasCalled = true; return expected; };
var storeMock = new Mock<IBackingStore>();
storeMock
.Setup(x => x.ContainsKey(It.IsAny<string>()))
.Returns(false);
storeMock
.Setup(x => x.Add(It.IsAny<string>(), It.IsAny<DbDataReader>()));
var sut = new NonExpiringCache(storeMock.Object);
// act
var actual = sut.GetDataReader(new SqlCommand(), query);
// assert
Assert.That(actual, Is.InstanceOf<CacheableDataReader>());
Assert.That(queryWasCalled, Is.True);
}
public void GetSqlDataReader_WhenBackingStoreThrows_ReThrowsException()
{
// arrange
var expected = new ApplicationException();
var storeMock = new Mock<IBackingStore>();
storeMock
.Setup(x => x.ContainsKey(It.IsAny<string>()))
.Returns(false);
storeMock
.Setup(x => x.Add(It.IsAny<string>(), It.IsAny<DbDataReader>())).Throws(expected);
var sut = new NonExpiringCache(storeMock.Object);
// assert
Assert.Throws(Is.SameAs(expected), () => sut.GetDataReader(new SqlCommand(), () => new MockDataReader()));
}
public void GetSqlDataReader_GivenNonCachedCommand_StoresResult()
{
// arrange
var expected = new MockDataReader();
Func<DbDataReader> query = () => expected;
var storeMock = new Mock<IBackingStore>();
storeMock
.Setup(x => x.ContainsKey(It.IsAny<string>()))
.Returns(false);
storeMock
.Setup(x => x.Add(It.IsAny<string>(), It.IsAny<DbDataReader>()));
var sut = new NonExpiringCache(storeMock.Object);
// act
var actual = sut.GetDataReader(new SqlCommand(), query);
// assert
storeMock.Verify(
x => x.Add(It.IsAny<string>(), It.IsAny<DbDataReader>()),
Times.Once());
}
