feat: begin adding tests for matchers

src/main.rs

@@ -1,4 +1,6 @@
 mod config;
+#[cfg(test)]
+mod test;
 
 use std::error::Error;
 use std::ops::{Deref, Not};

src/test.rs

@@ -0,0 +1,10 @@
+use crate::config::{Match, Matcher};
+
+#[test]
+fn regex_matcher() {
+    let matcher = Matcher::Regex {
+        pattern: "^https.*",
+    };
+    assert!(matcher.check_match("https://example.com"));
+    assert!(!matcher.check_match("example.com"));
+}