fix: format ComputedFile to kebab-case to match API (#23)

Author: Natchica

src/compute/computed_file.rs

@@ -31,7 +31,7 @@ use std::{fs, path::Path};
 /// }
 /// ```
 #[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
-#[serde(rename_all(deserialize = "kebab-case"))]
+#[serde(rename_all = "kebab-case")]
 pub struct ComputedFile {
     pub deterministic_output_path: Option<String>,
     pub callback_data: Option<String>,
@@ -304,6 +304,29 @@ mod tests {
 
     const TEST_TASK_ID: &str = "0x123456789abcdef";
 
+    #[test]
+    fn computed_file_serializes_to_kebab_case() {
+        let file = ComputedFile {
+            deterministic_output_path: Some("/iexec_out/result.txt".to_string()),
+            callback_data: Some("0xabc".to_string()),
+            task_id: Some(TEST_TASK_ID.to_string()),
+            result_digest: Some("0xdef".to_string()),
+            enclave_signature: Some("0xsig".to_string()),
+            error_message: Some("err".to_string()),
+        };
+        let expected = r#"{
+            "deterministic-output-path":"/iexec_out/result.txt",
+            "callback-data":"0xabc",
+            "task-id":"0x123456789abcdef",
+            "result-digest":"0xdef",
+            "enclave-signature":"0xsig",
+            "error-message":"err"
+        }"#;
+        let expected_value: serde_json::Value = serde_json::from_str(expected).unwrap();
+        let actual_value: serde_json::Value = serde_json::json!(&file);
+        assert_eq!(actual_value, expected_value);
+    }
+
     // region read_computed_file
     #[test]
     fn read_computed_file_returns_computed_file_when_valid_input() {