Organize test infrastructure

[twsouthwick]

The tests need to be cleaned up in order to decrease run time (such as is shown in #186). Things that need to be done:

• Remove test context - this is unused and appears to be a remnant of an old test system (Remove test context #231)
• Use xunit's ITestOutputHelper instead of creating custom log files (Use ITestOutputHelper instead of custom log files #230)
• Move test assets to be under the test directory so they can more easily be included in output using built-in tasks (Move test assets to be under tests directory #229)
• Consolidate OpenXmlDomTestExtensions - these seem to be duplicated and structured in a way so there is no single point where a file is opened. In order to speed up tests, this needs to be consolidated (Consolidate OpenXmlDomTestExtensions #228)
• Redo "Safelist.xml" comparisons. This uses many regex comparisons to search for known issues and drastically slows the tests down (see https://github.com/OfficeDev/Open-XML-SDK/blob/vNext/DocumentFormat.OpenXml.Tests/OpenXmlDomTaskLibrary/OpenXmlDomTaskLibrary.cs#L40-L73)
• Use embedded resources instead of flat files so that open operations can be done in-memory instead of via file paths. File IO is a huge bottleneck for these tests.
  • Use test assets for CreateDocumentTestClass (Create a base document test that ensures tests for each package type are run #395)
  • Use test assets for DocumentTraverseTests.Traverse[xxx]Document (Use embedded streaming for document traverse tests #403)
  • Use test assets for GenerateList4LowLevelTest (Use embedded streams for GenerateList4LowLevelTest #405)
  • Use test assets for MarkupCompatibilityTest (Use embedded test assets for MarkupCompatibilityTests #414)
  • Use test assets for OpenXmlCompositeElementTestClass (Use embedded resources for OpenXmlCompositeElement tests #402)
  • Use test assets for OpenXmlReaderWriterTest.[bug247883|bug251835_ReaderDispose] (Use embedded streams in OpenXmlReaderWriterTest #404)
  • Use test assets for OpenXmlRootElementTestClass (Use resources for OpenXmlRootElement tests #397)
• Create a test assets library to minimize compilation times
• Remove current test util helpers that generate files (Cleanup OpenXmlTestBase #443)
• Remove VerifiableLog and use ITestOutputHelper
• Move large generated tests to new assembly

[github-actions]

Stale issue message