public async Task UpdateAsync_CallsReplaceOneAsyncOnCollectionOnce_WhenValidIdAndNonNullEntityPassed()
{
//Arrange
//Create the BottleDomainModel that we will insert into the repo. This same entity should be returned by the method on a successful run.
var bottle = new BottleDomainModel {
BottleId = "507f1f77bcf86cd799439010", AlcoholCategory = AlcoholCategory.Whisky
};
var mockCollection = new Mock <IMongoCollection <BottleMongoModel> >();
_mockDbContext.SetupGet(c => c.Collection).Returns(mockCollection.Object);
var repo = new BottleMongoRepository(_mockDbContext.Object, _toMongoModelMapper, _toDomainModelMapper);
//Act
await repo.UpdateAsync("507f1f77bcf86cd799439010", bottle);
//Assert
//Verify that the db context Collection's InsertoneAsync method is called exactly once.
//Any more or less will throw meaning the test will fail.
mockCollection.Verify(c => c.ReplaceOneAsync(
It.IsAny <FilterDefinition <BottleMongoModel> >(),
It.IsAny <BottleMongoModel>(),
It.IsAny <ReplaceOptions>(),
It.IsAny <CancellationToken>()), Times.Once());
}
public async Task UpdateAsync_ReturnsWithoutAccessingCollection_WhenNullBottleDomainModelPassed()
{
//Arrange
//Set up the db context to throw if the Collection property is accessed. In this way we test that the InsertAsync method returns without ever accessing the collection.
_mockDbContext.Setup(c => c.Collection).Throws(new System.Exception("Test failed. MongoDbContext Collection property was accessed. UpdateAsync method should return without accessing the Collection property."));
var repo = new BottleMongoRepository(_mockDbContext.Object, _toMongoModelMapper, _toDomainModelMapper);
//Act
await repo.UpdateAsync("507f1f77bcf86cd799439010", null);
//Assert - assertion is just that the method returns without accessing the db context Collection property. Test will fail if the property is accessed.
}