karma: log bump events; rebuild web page with podium, sparklines, activity feed and givers

tests/karma.rs

@@ -1,5 +1,5 @@
 use rustbot::bot::module::{Action, Chat, Command, Module};
-use rustbot::bot::modules::karma::{extract_reason, parse_changes, Karma};
+use rustbot::bot::modules::karma::{extract_reason, format_event, parse_changes, Karma};
 
 fn chat<'a>(sender: &'a str, text: &'a str) -> Chat<'a> {
     Chat {
@@ -166,3 +166,45 @@ fn milestone_announced_at_ten() {
     assert!(msg.contains("rust reached 10 karma"), "{msg}");
     let _ = std::fs::remove_file(&path);
 }
+
+#[test]
+fn format_event_is_one_json_line() {
+    let line = format_event(1700000000, "rust", 1, "alice", Some("clean PR"));
+    assert!(line.ends_with('\n'));
+    assert_eq!(line.matches('\n').count(), 1);
+    assert!(line.contains("\"t\":1700000000"), "{line}");
+    assert!(line.contains("\"o\":\"rust\""), "{line}");
+    assert!(line.contains("\"d\":1"), "{line}");
+    assert!(line.contains("\"by\":\"alice\""), "{line}");
+    assert!(line.contains("\"why\":\"clean PR\""), "{line}");
+    // no reason -> no why field
+    let bare = format_event(1, "docs", -1, "bob", None);
+    assert!(!bare.contains("why"), "{bare}");
+    // quotes in a reason are escaped
+    let q = format_event(1, "x", 1, "y", Some("he said \"hi\""));
+    assert!(q.contains("\\\"hi\\\""), "{q}");
+}
+
+#[test]
+fn on_message_appends_to_the_event_log() {
+    let path = std::env::temp_dir().join("rubot-test-karma-ev.json");
+    let log = std::env::temp_dir().join("rubot-test-karma-ev.events.jsonl");
+    let _ = std::fs::remove_file(&path);
+    let _ = std::fs::remove_file(&log);
+    let mut k = Karma::with_path(path.clone());
+    k.on_message(&chat("alice", "rust++ for the clean PR"));
+    k.on_message(&chat("bob", "rust-- python++"));
+    let body = std::fs::read_to_string(&log).expect("event log written");
+    let lines: Vec<&str> = body.lines().collect();
+    assert_eq!(lines.len(), 3, "one line per bump: {body}");
+    assert!(lines[0].contains("\"o\":\"rust\"") && lines[0].contains("\"by\":\"alice\""));
+    assert!(
+        lines[0].contains("\"why\":\"the clean PR\""),
+        "{}",
+        lines[0]
+    );
+    // the two-bump message attributes no reason
+    assert!(!lines[1].contains("why") && !lines[2].contains("why"));
+    let _ = std::fs::remove_file(&path);
+    let _ = std::fs::remove_file(&log);
+}