Polaroider 2.0.7

Polaroider

Automated Snapshottesting for .NET

Simplify UnitTesting with snapshots.
Polaroider is a Approval Testing Framework that creates and compares snapshots of objects.
This makes testing of objects and their content easy and fast.

// arrange
var repository = new PersonRepository();

// act
var person = repository.LoadTestPerson(...);

// assert
person.MatchSnapshot();

Testing with Snapshots

Snashots help when testing objects or large strings

• Snapshots ensure that objects don't change. When adding or removing properties insid objects, these are automatically captured and asserted in the tests
• Sanpshots ensure the state of objects. All data and property values of objects are validated and asserted
• Simplify testing that big strings are be same. Just create a snapshot of the string and compare them in any further testrun

Visit https://wickedflame.github.io/Polaroider/ for the full documentation.

Troubleshooting

When having trouble generating Snapshots or the TestMethodNotFoundException is thrown, please make sure that the option for Optimize code is disabled and *.pdb files are generated. For more information visit https://wickedflame.github.io/Polaroider/troubleshooting

Update from v1 to v2

v1 was focused on simplicity. v2 is focused on flexibility while maintaining simplicity.

There are some breaking changes when updating to v2.

Mapping of simple types

• DateTimes are mapped in the ISO 8601 format to be Culture-Independent
• Null strings are now displayed as null
• Empty strings are now displayed as ''

Before updating to v2 ensure that all tests are executed without errors. If some tests throw a MismatchException there are two possibilities:

• Update the snapshots with the UpdateSnapshot Attribute
• Set the UseBasicFormatters on the SnapshotOptions. This resets all Formatters to the same as were used in v1

SnapshotOptions.Setup(o =>
{
    o.UseBasicFormatters();
});