Run all unit tests on CI (#261)

Summary:
Run all unit tests plus generating the coverage.  Exposing the coverage on GitHub takes a bit more work, so I will do it in a later PR, basically I. need to tweak the linux job to upload the coverage.

Pull Request resolved: #261

Test Plan: https://github.com/pytorch/executorch/actions/runs/6128463607/job/16635528064?pr=261#step:11:99

Reviewed By: guangy10

Differential Revision: D49121950

Pulled By: huydhn

fbshipit-source-id: eb527b42ccf16cce7c7dd3b73f4dd2a8fde9c55e

Author: huydhn

.ci/docker/requirements-ci.txt

@@ -7,9 +7,13 @@ timm==0.6.13
 tomli==2.0.1
 transformers==4.31.0
 zstd==1.5.5.1
+pytest==7.2.0
+pytest-cov==4.1.0
+expecttest==0.1.6
+hypothesis==6.84.2
+parameterized==0.9.0
 
 # Doc build requirements
-
 sphinx==5.0.0
 sphinx-gallery
 matplotlib

.github/workflows/_unittest.yml

@@ -0,0 +1,37 @@
+name: Run all unittests
+
+on:
+  workflow_call:
+    inputs:
+      docker-image:
+        required: true
+        type: string
+        description: Name of the docker image to use.
+      runner:
+        required: false
+        type: string
+        default: 'linux.2xlarge'
+        description: The default runner for PyTorch infra.
+      python-version:
+        required: false
+        type: string
+        default: '3.10'
+
+jobs:
+  unittest:
+    name: unittest
+    uses: pytorch/test-infra/.github/workflows/linux_job.yml@main
+    with:
+      runner: ${{ inputs.runner }}
+      docker-image: ${{ inputs.docker-image }}
+      submodules: 'true'
+      ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
+      timeout: 60
+      script: |
+        set -eux
+        export PATH="/opt/conda/envs/py_${{ inputs.python-version }}/bin:${PATH}"
+
+        # Just need to install executorch, everything else has been setup
+        pip install .
+        # Run pytest with coverage
+        pytest --cov=./ --cov-report=xml

.github/workflows/pull.yml

@@ -189,3 +189,9 @@ jobs:
         # Build and test selective build
         PYTHON_EXECUTABLE=python bash examples/selective_build/test_selective_build.sh "${BUILD_TOOL}"
         popd
+
+  unittest:
+    uses: ./.github/workflows/_unittest.yml
+    with:
+      docker-image: executorch-ubuntu-22.04-clang12
+      runner: linux.2xlarge