Implement display on partial requests

This returns the underlying message string

Author: kyleect

src/models/partial_request.rs

@@ -1,3 +1,4 @@
+use core::fmt;
 use std::{ops::Range, str::FromStr};
 
 use crate::{error::Error, span::get_line_spans};
@@ -15,6 +16,12 @@ pub struct PartialHttpRequest {
     body: Option<Range<usize>>,
 }
 
+impl fmt::Display for PartialHttpRequest {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.message())
+    }
+}
+
 impl PartialHttpRequest {
     pub fn new(
         message: &str,

tests/display_tests.rs

@@ -0,0 +1,47 @@
+use std::{fs, str::FromStr};
+
+use http_message::PartialHttpRequest;
+
+use pretty_assertions::assert_eq;
+
+test!(display_empty_request, "./tests/fixtures/empty.request");
+test!(
+    display_get_with_headers_request,
+    "./tests/fixtures/get_with_headers.request"
+);
+test!(
+    display_get_with_multiple_spaces_request,
+    "./tests/fixtures/get_with_multiple_spaces.request"
+);
+test!(
+    display_get_without_http_version_request,
+    "./tests/fixtures/get_without_http_version.request"
+);
+test!(display_get_request, "./tests/fixtures/get.request");
+test!(
+    display_post_with_body_request,
+    "./tests/fixtures/post_with_body.request"
+);
+test!(
+    display_post_with_headers_and_body_request,
+    "./tests/fixtures/post_with_headers_and_body.request"
+);
+test!(
+    display_whitespace_request,
+    "./tests/fixtures/whitespace.request"
+);
+
+#[macro_export]
+macro_rules! test {
+    ($name:ident, $path:expr) => {
+        #[test]
+        fn $name() {
+            let path: &str = $path;
+            let content = fs::read_to_string(path).expect("should read test fixture");
+
+            let partial = PartialHttpRequest::from_str(&content).expect("should be parsable");
+
+            assert_eq!(content, format!("{partial}"));
+        }
+    };
+}