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Initial C++ fuzz tests #1605

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This changelist adds initial C++ fuzz tests to the XmlIo module of the MaterialX test suite. In these new tests, pseudo-random edits are applied to a set of source documents before import, in order to uncover edge cases that aren't yet handled in MaterialXCore and MaterialXFormat.

Also:

  • Add missing type casts to invalidNameChar and hasWindowDriveSpecifier.
  • Make random numbers deterministic in shaderGenPerformanceTest.

This changelist adds initial C++ fuzz tests to the XmlIo module of the MaterialX test suite.  In these new tests, pseudo-random edits are applied to a set of source documents before import, in order to uncover edge cases that aren't yet handled in MaterialXCore and MaterialXFormat.

Also:

- Add missing type casts to invalidNameChar and hasWindowDriveSpecifier.
- Make random numbers deterministic in shaderGenPerformanceTest.
@jstone-lucasfilm jstone-lucasfilm merged commit e45d67f into AcademySoftwareFoundation:main Nov 27, 2023
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