Added test action yml.

.github/workflows/pdf-generator_test.yml

@@ -0,0 +1,19 @@
+name: Solver Test
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    name: Run Solver Tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set nightly mode
+        run: rustup override set nightly
+
+      - name: Check out code
+        uses: actions/checkout@v2
+
+      - name: Run tests
+        run: cargo test --release --manifest-path pdf-generator/Cargo.toml