tests(compute-static): add basic unit tests

.github/workflows/main.yml

@@ -14,6 +14,11 @@ jobs:
       - name: Install Rust stable
         run: rustup update stable && rustup default stable && rustup component add clippy rustfmt
 
+      - name: Install tools for compute-static tests
+        uses: taiki-e/install-action@493d7f216ecab2af0602481ce809ab2c72836fa1 # v2.62.62
+        with:
+          tool: cargo-nextest,viceroy
+
       - name: Run rustfmt
         run: cargo fmt --all -- --check
 
@@ -23,6 +28,10 @@ jobs:
       - name: Run clippy
         run: cargo clippy --all -- -Dwarnings
 
+      - name: Run compute-static tests
+        working-directory: terragrunt/modules/crates-io/compute-static
+        run: cargo nextest run
+
   terraform:
     name: Terraform configuration
     runs-on: ubuntu-24.04

terragrunt/modules/crates-io/compute-static/.cargo/config.toml

@@ -1,2 +1,5 @@
 [build]
-target = "wasm32-wasi"
+target = "wasm32-wasip1"
+
+[target.wasm32-wasip1]
+runner = "viceroy run -C fastly.toml -- "

terragrunt/modules/crates-io/compute-static/README.md

@@ -8,13 +8,38 @@ responses.
 
 ## Development
 
-Build the function:
+Install the Fastly CLI from [here](https://www.fastly.com/documentation/reference/tools/cli/#installing).
+
+Then, build the function:
 
 ```shell
 cd compute-static
 fastly compute build
 ```
 
+## Testing
+
+Testing requires [cargo-nextest](https://nexte.st/docs/installation/pre-built-binaries/), as specified in
+the [Fastly documentation](https://www.fastly.com/documentation/guides/compute/developer-guides/rust/). You can install
+it from source with binstall:
+
+```shell
+cargo install cargo-binstall
+cargo binstall cargo-nextest --secure
+```
+
+Then, install [Viceroy](https://github.com/fastly/Viceroy) to run the edge function locally:
+
+```shell
+cargo install --locked viceroy
+```
+
+Finally, run the tests:
+
+```shell
+cargo nextest run
+```
+
 ## Deployment
 
 Terraform uses an [external data source] to build the function as part of its