From 2fe2e8cdbc3bb520994ff0944188f2fa657c546a Mon Sep 17 00:00:00 2001
From: salmonik <salmonik@tuta.io>
Date: Sun, 1 Nov 2026 17:49:08 +0100
Subject: v4.0.0: require HELLO MAJOR.MINOR lockstep before auth

---
 tests/version.rs | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 tests/version.rs

(limited to 'tests/version.rs')

diff --git a/tests/version.rs b/tests/version.rs
new file mode 100644
index 0000000..ef58601
--- /dev/null
+++ b/tests/version.rs
@@ -0,0 +1,71 @@
+use zagan_bet::version::{
+    compatible, hello_line, is_newer, parse_hello, Version, VERSION,
+};
+
+#[test]
+fn versions_parse_and_reject_nonsense() {
+    assert_eq!(
+        Version::parse("4.0.0"),
+        Some(Version {
+            major: 4,
+            minor: 0,
+            patch: 0
+        })
+    );
+    assert_eq!(
+        Version::parse("v4.1.2"),
+        Some(Version {
+            major: 4,
+            minor: 1,
+            patch: 2
+        })
+    );
+    assert_eq!(
+        Version::parse("4.0.0-rc1").map(|v| (v.major, v.minor, v.patch)),
+        Some((4, 0, 0))
+    );
+    assert_eq!(
+        Version::parse("4.0.0+build7").map(|v| v.patch),
+        Some(0)
+    );
+
+    for bad in ["", "4", "4.0", "4.0.0.1", "x.0.0", "4.x.0", "4.0.0-"] {
+        assert!(Version::parse(bad).is_none(), "{bad:?} should not parse");
+    }
+
+    assert!(Version::parse(VERSION).is_some(), "the build version must parse");
+}
+
+#[test]
+fn compatibility_is_major_and_minor_only() {
+    assert!(compatible("4.0.0", "4.0.9"));
+    assert!(compatible("4.2.7", "4.2.1"));
+    assert!(!compatible("4.0.0", "4.1.0"));
+    assert!(!compatible("4.0.0", "5.0.0"));
+    assert!(!compatible("nope", "4.0.0"));
+}
+
+#[test]
+fn newer_versions_are_ordered_by_major_minor_patch() {
+    assert!(is_newer("4.0.1", "4.0.0"));
+    assert!(is_newer("4.1.0", "4.0.9"));
+    assert!(is_newer("5.0.0", "4.9.9"));
+    assert!(!is_newer("4.0.0", "4.0.0"));
+    assert!(!is_newer("4.0.0", "4.0.1"));
+    assert!(!is_newer("nonsense", "4.0.0"));
+}
+
+#[test]
+fn the_hello_reply_round_trips() {
+    let line = hello_line("4.0.0", "4.1.2", "https://zagan.example/");
+    let reply = parse_hello(&line).expect("parse a generated reply");
+
+    assert_eq!(reply.version, "4.0.0");
+    assert_eq!(reply.latest, "4.1.2");
+    assert_eq!(reply.url, "https://zagan.example/");
+
+    assert!(parse_hello("HELLO 4.0.0 url=https://x/").is_none(), "latest is required");
+    assert!(parse_hello("HELLO 4.0.0 latest=4.0.0").is_none(), "url is required");
+    assert!(parse_hello("PONG").is_none());
+    assert!(parse_hello("HELLO").is_none());
+}
-- 
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