Glslang Tests based on the Google Test Framework

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This directory contains [Google Test][gtest] based test fixture and test

cases for glslang.

Apart from typical unit tests, necessary utility methods are added into

the [`GlslangTests`](TestFixture.h) fixture to provide the ability to do

file-based integration tests. Various `*.FromFile.cpp` files lists names

of files containing input shader code in the `Test/` directory. Utility

methods will load the input shader source, compile them, and compare with

the corresponding expected output in the `Test/baseResults/` directory.

How to run the tests

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Please make sure you have a copy of [Google Test][gtest] checked out under

the `External` directory before building. After building, just run the

`ctest` command or the `gtests/glslangtests` binary in your build directory.

The `gtests/glslangtests` binary also provides an `--update-mode` command

line option, which, if supplied, will overwrite the golden files under

the `Test/baseResults/` directory with real output from that invocation.

This serves as an easy way to update golden files.

[gtest]: https://github.com/google/googletest