optimize npm installs

.github/scripts/integration_test_runner.sh

@@ -1,10 +1,5 @@
 #!/usr/bin/env bash
 
-# setup hardhat for compilation tests
-pushd tests/e2e/compilation/test_data/test_node_modules/ || exit
-npm install hardhat
-popd || exit
-
 # used to pass --cov=$path and --cov-append to pytest
 if [ "$1" != "" ]; then
     pytest "$1" tests/e2e/ -n auto

.github/scripts/tool_test_runner.sh

@@ -1,6 +1,5 @@
 #!/usr/bin/env bash
 
-npm install --global ganache
 # used to pass --cov=$path and --cov-append to pytest
 if [ "$1" != "" ]; then
     pytest "$1" tests/tools/read-storage/test_read_storage.py

.github/workflows/test.yml

@@ -40,6 +40,25 @@ jobs:
           solc-select install 0.8.0
           solc-select use 0.8.0
 
+      - name: Setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: '16'
+          cache: 'npm'
+          cache-dependency-path: '**/package-lock.json'
+
+      - name: Install ganache
+        run: |
+          if [ ${{ matrix.type }} = "tool" ]; then
+            # Setup Ganache for slither-read-storage tests.
+            npm install --global ganache
+          elif [ ${{ matrix.type }} = "integration" ]; then
+            # Setup Hardhat for compilation tests.
+            pushd tests/e2e/compilation/test_data/test_node_modules/ || exit
+            npm install hardhat
+            popd || exit
+          fi
+
       - name: ${{ matrix.type }}
         env:
           TEST_TYPE: ${{ matrix.type }}

tests/e2e/compilation/test_data/test_node_modules/.gitignore

@@ -0,0 +1,3 @@
+artifacts/
+cache/
+node_modules/

tests/e2e/compilation/test_data/test_node_modules/package.json

@@ -1,6 +1,6 @@
 {
   "dependencies": {
     "@openzeppelin/contracts": "^4.4.0",
-    "hardhat": "^2.7.0"
+    "hardhat": "^2.13.0"
   }
 }