documentation of tests

test/README.md

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+> Quote: *"if one builds straight on top of web standards it’s going to be durable; tooling is fashionable and comes and goes"* ~ Diego Marcos (AFRAME)
+
+| file                   | info                        |
+|------------------------|-----------------------------|
+| test                   |                             |
+| ├── aframe             |                             |
+| │   ├── index.html     | testrunner AFRAME           |
+| │   ├── filter.js      | XRF<->THREE filter tests [[run online]](https://coderofsalvation.github.io/test/aframe) |
+| │   ├── index.js       |                             |
+| │   └── pubsub.js      | XRF promisable-events tests |
+| ├── generated          |                              |
+| │   ├── test.js        | parser tests (HaXe generated)|
+| │   └── test.py        | parser tests (HaXe generated)|
+| ├── test.js            | parser test manual          |
+| ├── test.lua           | parser test manual          |
+| └── test.py            | parser test manual          |
+
+The generated tests use the parser [JSON spec in src/spec](src/spec) as input.<br>
+In case of writing your own parser (without HaXe) you can use those JSON spec-files to ensure compatibility.