Output tester's result in JSON

1 files changed, 16 insertions, 4 deletions

diff --git a/rust/src/tester.rs b/rust/src/tester.rs
index 019989b..eb66d4e 100644
--- a/rust/src/tester.rs
+++ b/rust/src/tester.rs
@@ -1,3 +1,4 @@
+use serde::{Deserialize, Serialize};
 use std::{
     fs::{self, read_to_string, File},
     path::PathBuf,
@@ -13,9 +14,20 @@ pub fn main() {
         let run = traverse(&args)
             .and_then(|paths| run_test(&proc, &paths))
             .expect("Failed to traverse directory");
-        println!("{:?}", run)
+        println!("{}", serde_json::to_string_pretty(&run).unwrap());
     } else {
-        println!("Usage: tester <process> <directory>+");
+        println!(
+            r#"Usage: tester [options] <directory>+
+
+Options:
+    -p, --process   The process to run. If the given process is not a
+                    an absolute path, it will be resolved against the
+                    PATH environment variable.
+    -j, --json      Output the results in JSON format (default: false)
+    -h, --help      Display this help message
+    -v, --version   Display the version of the tester
+"#
+        );
     }
 }
 
@@ -34,13 +46,13 @@ fn traverse(args: &[String]) -> Result<Vec<PathBuf>, String> {
     Ok(files)
 }
 
-#[derive(Debug)]
+#[derive(Debug, Serialize, Deserialize)]
 pub enum TestResult {
     TestSucceeded,
     TestFailed(String, String),
 }
 
-#[derive(Debug)]
+#[derive(Debug, Serialize, Deserialize)]
 pub struct TestRun {
     file: String,
     test_result: TestResult,