chore: add circuit tests to CI

.github/workflows/action.yml

@@ -1,5 +1,49 @@
+name: "Proof of Twitter tests"
+description: "Runs circuit and contract unit tests, and e2e tests with app running locally"
 on: [push]
 jobs:
+  run_circuit_tests:
+    runs-on: ubuntu-latest
+    environment: development
+    steps:
+      - uses: actions/checkout@v3
+
+      # Circom installation from https://github.com/erhant/circomkit/blob/main/.github/workflows/tests.yml
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install --yes \
+            build-essential \
+            libgmp-dev \
+            libsodium-dev \
+            nasm \
+            nlohmann-json3-dev
+
+      - name: Set Node.js 18.x
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18
+
+      - name: Setup Rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Download Circom Binary v2.1.5
+        run: |
+          wget -qO /home/runner/work/circom https://github.com/iden3/circom/releases/download/v2.1.5/circom-linux-amd64
+          chmod +x /home/runner/work/circom
+          sudo mv /home/runner/work/circom /bin/circom
+
+      - name: Print Circom version
+        run: circom --version
+
+      - name: Install Yarn dependencies
+        working-directory: ./packages/circuits
+        run: yarn install --immutable
+
+      - name: Run Tests
+        working-directory: ./packages/circuits
+        run: yarn test
+
   run_contract_tests:
     runs-on: ubuntu-latest
     environment: development

.gitignore

@@ -55,8 +55,6 @@ node_modules.nosync
 *wallet*
 circuits/regexes/subject_regex*
 
-# Files that never should be committed, but can be obtained by asking Aayush or generating them yourself
-*.eml
 *_email.txt
 *email_cache.json
 *input.json