Create add-to-project workflow #114

	name: Tests
	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]
	workflow_dispatch:
	jobs:
	# Bazelisk is included in github runners
	# Bazel cache: https://docs.bazel.build/versions/main/output_directories.html
	# NOTE: Cache path doesn't support env expansion
	linux:
	runs-on: ubuntu-latest
	steps:
	# Caches and restores the bazelisk download directory, the bazel build directory.
	- name: Cache bazel
	uses: actions/cache@v2
	with:
	path: \|
	~/.cache/bazelisk
	~/.cache/bazel
	key: ${{ runner.os }}-bazel-cache
	- uses: actions/checkout@v2
	- name: bazel test
	run: bazel test --test_output=errors //...
	macos:
	runs-on: macos-latest
	steps:
	# Caches and restores the bazelisk download directory, the bazel build directory.
	- name: Cache bazel
	uses: actions/cache@v2
	with:
	path: \|
	~/.cache/bazelisk
	/private/var/tmp/_bazel_runner
	key: ${{ runner.os }}-bazel-cache
	- uses: actions/checkout@v2
	- name: bazel test
	run: bazel test --test_output=errors //...
	windows:
	runs-on: windows-latest
	steps:
	# Caches and restores the bazelisk download directory, the bazel build directory.
	- name: Cache bazel
	uses: actions/cache@v2
	with:
	path: \|
	~\AppData\Local\bazelisk
	~\_bazel_runneradmin
	key: ${{ runner.os }}-bazel-cache
	- uses: actions/checkout@v2
	- name: bazel test
	run: bazel test --test_output=errors //...

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