test: add cache

Author: dubadub

.github/workflows/test.yml

@@ -23,6 +23,18 @@ jobs:
           toolchain: stable
           override: true
 
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: ${{ runner.os }}-cargo-
+
       - name: Run cargo check
         uses: actions-rs/cargo@v1
         continue-on-error: true  # WARNING: only for this example, remove it!
@@ -43,6 +55,18 @@ jobs:
           toolchain: stable
           override: true
 
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: ${{ runner.os }}-cargo-
+
       - name: Run cargo test
         uses: actions-rs/cargo@v1
         continue-on-error: true  # WARNING: only for this example, remove it!
@@ -64,6 +88,18 @@ jobs:
           override: true
           components: rustfmt, clippy
 
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: ${{ runner.os }}-cargo-
+
       - name: Run cargo fmt
         uses: actions-rs/cargo@v1
         continue-on-error: true  # WARNING: only for this example, remove it!