test: add test cases for serve

Signed-off-by: Frank Yang <[email protected]>

Author: FrankYang0529

Cargo.lock

@@ -23,4 +23,7 @@ spin-sdk = { git = "https://github.com/fermyon/spin", rev = "4c6ec40ef8b518c1e90
 # The wit-bindgen-rust dependency generates bindings for interfaces.
 wit-bindgen-rust = { git = "https://github.com/bytecodealliance/wit-bindgen", rev = "dde4694aaa6acf9370206527a798ac4ba6a8c5b8" }
 
+[dev-dependencies]
+wasm-bindgen-test = "0.3.31"
+
 [workspace]

Cargo.toml

@@ -0,0 +1,3 @@
+.PHONY: test
+test:
+	wasm-pack test --node

Makefile

@@ -58,3 +58,18 @@ Compiling the component:
 ```shell
 $ cargo build --release
 ```
+
+### Testing
+
+Prerequisites:
+
+- [Rust](https://www.rust-lang.org/) at
+  [1.56+](https://www.rust-lang.org/tools/install) with the `wasm32-wasi` target
+  configured
+- [wasm-pack](https://github.com/rustwasm/wasm-pack)
+
+Running test cases:
+
+```shell
+$ make test
+```

readme.md

@@ -27,7 +27,7 @@ const BROTLI_ENCODING: &str = "br";
 const PATH_INFO_HEADER: &str = "spin-path-info";
 
 /// Common Content Encodings
-#[derive(PartialEq)]
+#[derive(PartialEq, Debug)]
 pub enum ContentEncoding {
     Brotli,
     //Deflate, // Could use flate2 for this
@@ -66,6 +66,7 @@ fn serve(req: Request) -> Result<Response> {
         .get(PATH_INFO_HEADER)
         .expect("PATH_INFO header must be set by the Spin runtime")
         .to_str()?;
+    println!("path: {}", path);
     let if_none_match = req
         .headers()
         .get(IF_NONE_MATCH)
@@ -156,3 +157,59 @@ impl FileServer {
         state.finish().to_string()
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use http::header::ACCEPT_ENCODING;
+    use wasm_bindgen_test::*;
+
+    use super::*;
+
+    #[wasm_bindgen_test]
+    fn test_best_encoding_none() {
+        let req = http::Request::builder()
+            .uri("http://thisistest.com")
+            .body(Some(bytes::Bytes::default()))
+            .unwrap();
+        let enc = ContentEncoding::best_encoding(&req).unwrap();
+        assert_eq!(enc, ContentEncoding::None);
+    }
+
+    #[wasm_bindgen_test]
+    fn test_best_encoding_not_br() {
+        let req = http::Request::builder()
+            .uri("http://thisistest.com")
+            .header(ACCEPT_ENCODING, "gzip")
+            .body(Some(bytes::Bytes::default()))
+            .unwrap();
+        let enc = ContentEncoding::best_encoding(&req).unwrap();
+        assert_eq!(enc, ContentEncoding::None);
+    }
+
+    #[wasm_bindgen_test]
+    fn test_best_encoding_with_br() {
+        let req = http::Request::builder()
+            .uri("http://thisistest.com")
+            .header(ACCEPT_ENCODING, "gzip,br")
+            .body(Some(bytes::Bytes::default()))
+            .unwrap();
+        let enc = ContentEncoding::best_encoding(&req).unwrap();
+        assert_eq!(enc, ContentEncoding::Brotli);
+    }
+
+    #[wasm_bindgen_test]
+    fn test_serve_file_not_found() {
+        let req = spin_http::Request {
+            method: spin_http::Method::Get,
+            uri: "http://thisistest.com".to_string(),
+            headers: vec![(
+                PATH_INFO_HEADER.to_string(),
+                "not-existent-file".to_string(),
+            )],
+            params: vec![],
+            body: None,
+        };
+        let rsp = <super::SpinHttp as spin_http::SpinHttp>::handle_http_request(req);
+        assert_eq!(rsp.status, 404);
+    }
+}