replace exit_code test fixture with noop test fixture when tests rely…

… on success results

The exit code function does not return valid JSON which means it will fail with a non-zero exit code.
Instead, use a new noop test fixture that does return valid JSON for tests that expect a successful result.

Cargo.toml

@@ -3,6 +3,7 @@ members = [
   "tests/fixtures/exit_code",
   "tests/fixtures/log_truncation_function",
   "tests/fixtures/exports",
+  "tests/fixtures/noop",
 ]
 
 [package]

tests/fixtures/README.md

@@ -11,8 +11,8 @@ Example Functions used as test fixtures.
 
 **Rust examples:**
 ```
-cargo wasi build --profile=wasm -p exit_code -p exports -p log_truncation_function &&
-  cp target/wasm32-wasi/wasm/{exit_code.wasm,exports.wasm,log_truncation_function.wasm} tests/fixtures/build
+cargo wasi build --profile=wasm -p exit_code -p exports -p log_truncation_function -p noop &&
+  cp target/wasm32-wasi/wasm/{exit_code.wasm,exports.wasm,log_truncation_function.wasm,noop.wasm} tests/fixtures/build
 ```
 
 **JS examples:**

tests/fixtures/noop/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "noop"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+nanoserde = "0.1.37"

tests/fixtures/noop/src/main.rs

@@ -0,0 +1,9 @@
+use std::io;
+use std::io::Write;
+
+fn main() -> std::io::Result<()> {
+    let input_string = io::read_to_string(io::stdin())?;
+    std::io::stdout().write_all(input_string.as_bytes())?;
+    std::io::stdout().flush()?;
+    Ok(())
+}

tests/integration_tests.rs

@@ -15,9 +15,9 @@ mod tests {
     #[test]
     fn run() -> Result<(), Box<dyn std::error::Error>> {
         let mut cmd = Command::cargo_bin("function-runner")?;
-        let input_file = temp_input(json!({"exit_code": 0}))?;
+        let input_file = temp_input(json!({"count": 0}))?;
 
-        cmd.args(["--function", "tests/fixtures/build/exit_code.wasm"])
+        cmd.args(["--function", "tests/fixtures/build/noop.wasm"])
             .arg("--input")
             .arg(input_file.as_os_str());
         cmd.assert().success();
@@ -100,9 +100,9 @@ mod tests {
     #[test]
     fn run_json() -> Result<(), Box<dyn std::error::Error>> {
         let mut cmd = Command::cargo_bin("function-runner")?;
-        let input_file = temp_input(json!({"exit_code": 0}))?;
+        let input_file = temp_input(json!({"count": 0}))?;
 
-        cmd.args(["--function", "tests/fixtures/build/exit_code.wasm"])
+        cmd.args(["--function", "tests/fixtures/build/noop.wasm"])
             .arg("--json")
             .arg("--input")
             .arg(input_file.as_os_str());
@@ -146,8 +146,7 @@ mod tests {
     fn profile_writes_file() -> Result<(), Box<dyn std::error::Error>> {
         let (mut cmd, temp) = profile_base_cmd_in_temp_dir()?;
         cmd.arg("--profile").assert().success();
-        temp.child("exit_code.perf")
-            .assert(predicate::path::exists());
+        temp.child("noop.perf").assert(predicate::path::exists());
 
         Ok(())
     }
@@ -167,8 +166,7 @@ mod tests {
         cmd.args(["--profile-frequency", "80000"])
             .assert()
             .success();
-        temp.child("exit_code.perf")
-            .assert(predicate::path::exists());
+        temp.child("noop.perf").assert(predicate::path::exists());
 
         Ok(())
     }
@@ -183,10 +181,13 @@ mod tests {
             .arg(input_file.as_os_str());
 
         cmd.assert()
-            .success()
+            .failure()
             .stdout(contains("Key not found code"))
             .stdout(contains("Invalid Output"))
             .stdout(contains("JSON Error"))
+            .stderr(contains(
+                "Error: The Function execution failed. Review the logs for more information.",
+            ))
             .stderr(contains(""));
 
         Ok(())
@@ -246,11 +247,11 @@ mod tests {
         let cwd = std::env::current_dir()?;
         let temp = assert_fs::TempDir::new()?;
         let input_file = temp.child("input.json");
-        input_file.write_str(json!({"exit_code": 0}).to_string().as_str())?;
+        input_file.write_str(json!({"count": 0}).to_string().as_str())?;
 
         cmd.current_dir(temp.path())
             .arg("--function")
-            .arg(cwd.join("tests/fixtures/build/exit_code.wasm"))
+            .arg(cwd.join("tests/fixtures/build/noop.wasm"))
             .arg("--input")
             .arg(input_file.as_os_str());
 
@@ -276,7 +277,7 @@ mod tests {
             ]
         }}))?;
 
-        cmd.args(["--function", "tests/fixtures/build/exit_code.wasm"])
+        cmd.args(["--function", "tests/fixtures/build/noop.wasm"])
             .arg("--input")
             .arg(input_file.as_os_str());
         cmd.assert().success();
@@ -300,7 +301,7 @@ mod tests {
             ]
         }}))?;
 
-        cmd.args(["--function", "tests/fixtures/build/exit_code.wasm"])
+        cmd.args(["--function", "tests/fixtures/build/noop.wasm"])
             .arg("--input")
             .arg(input_file.as_os_str())
             .arg("--schema-path")
@@ -328,7 +329,7 @@ mod tests {
         });
         let input_file = temp_input(json_data)?;
 
-        cmd.args(["--function", "tests/fixtures/build/exit_code.wasm"])
+        cmd.args(["--function", "tests/fixtures/build/noop.wasm"])
             .arg("--input")
             .arg(input_file.as_os_str())
             .arg("--schema-path")