Dedicated email parsing (currently only tests as starting point)

src/parser/email.rs

@@ -0,0 +1,141 @@
+///! Parsing / Validation of email addresses
+///
+/// It should follow [RFC 5322](https://datatracker.ietf.org/doc/html/rfc5322#section-1)
+/// and [RFC 6532](https://datatracker.ietf.org/doc/html/rfc6532)
+
+#[cfg(test)]
+mod test_email_validation {
+
+    // Credits of original test data: https://github.com/Sayan751/email-address-parser
+    // License of original test data: MIT
+    // original sources: https://github.com/Sayan751/email-address-parser/blob/df6de2b99db5dc31b5eab4258f64ea4809e932cc/rust-lib/.test_data/
+    const invalid_domains: Vec<&'static str> = vec![
+        r#""#,
+        r#"example.com>"#,
+        r#"test..com"#,
+        r#".test.com"#,
+        r#"test.com."#,
+        r#"google.."#,
+        r#".com"#,
+        r#"google-.com"#,
+        r#"-google-.com"#,
+    ];
+    const invalid_local_parts: Vec<&'static str> = vec![
+        r#""#,
+        r#"a\\ud83c"#,
+        r#"\"test"#,
+        r#"test."#,
+        r#"te..st"#,
+        r#"<test"#,
+        r#"test>"#,
+        r#".test"#,
+        r#"\"test\\ t\"est\""#,
+        r#"\"test t\"est\""#,
+        r#"te\";\"st"#,
+        r#"te;st"#,
+    ];
+    const valid_domains: Vec<&'static str> = vec![
+        r#"google.com"#,
+        r#"m.maselkowski.pl"#,
+        r#"xn--masekowski-d0b.pl"#,
+        r#"[127.0.0.0]"#,
+        r#"[192.168.0.1]"#,
+        r#"[1.2.3.4]"#,
+        r#"[0.0.0.1]"#,
+        r#"[255.255.255.254]"#,
+        r#"masełkowski.pl.com"#,
+        r#"中国互联网络信息中心.中国"#,
+        r#"中国互联网络信息中心.xn--masekowski-d0b"#,
+        r#"bücher.com"#,
+        r#"nächste.de"#,
+        r#"löwen.de"#,
+        r#"افغانستا.com"#,
+        r#"বাংলাদেশ.com"#,
+        r#"беларусь.com"#,
+        r#"belgië.com"#,
+        r#"českárepublika.com"#,
+        r#"مصر.com"#,
+        r#"ελλάδα.com"#,
+        r#"ísland.com"#,
+        r#"भारत.com"#,
+        r#"איקו״ם.ישראל.com"#,
+        r#"қазақстан.com"#,
+        r#"한국.com"#,
+        r#"кыргызстан.com"#,
+        r#"ລາວ.com"#,
+        r#"македонија.com"#,
+        r#"монголулс.com"#,
+        r#"россия.иком.com"#,
+        r#"இலங்கை.com"#,
+        r#"españa.com"#,
+        r#"ไทย.com"#,
+        r#"việtnam.com"#,
+        r#"📻.fm"#,
+        r#"🎁.de"#,
+        r#"âêîôû.Çéàèù.ëïü"#,
+    ];
+    const valid_local_parts: Vec<&'static str> = vec![
+        r#"test"#,
+        r#"a"#,
+        r#"!#$%&'*+-/=?^_`{|}~"#,
+        r#"\"test test\""#,
+        r#"\"test\\ test\""#,
+        r#"te.st"#,
+        r#"\"te\\,st\""#,
+        r#"\"te\\;st\""#,
+    ];
+
+    #[test]
+    fn domain_part_invalid() {
+        // parse invalid domains parts
+    }
+
+    #[test]
+    fn domain_part_valid() {
+        // parse valid domains parts
+    }
+
+    #[test]
+    fn local_part_invalid() {
+        // parse invalid local parts
+    }
+
+    #[test]
+    fn local_part_valid() {
+        // parse valid local parts
+    }
+
+    #[test]
+    fn local_part_valid() {
+        // parse valid local parts
+    }
+
+    fn combinde_email_parts(local_parts: Vec<&string>, domain_parts: Vec<&string>) -> Vec<String> {
+        let mut emails: Vec<String> = Vec::new();
+        for domain_part in domain_parts {
+            for local_part in local_parts {
+                emails.push(format!("{}@{}", local_part, domain_part));
+            }
+        }
+        emails
+    }
+
+    #[test]
+    fn parse_valid_emails() {
+        let emails = combinde_email_parts(valid_local_parts, valid_domains);
+
+        for email in emails {
+            assert_eq(true /* todo parse email */, true)
+        }
+    }
+
+    fn parse_invalid_emails() {
+        let emails = combinde_email_parts(invalid_local_parts, invalid_domains)
+            .extend(combinde_email_parts(valid_local_parts, invalid_domains))
+            .extend(combinde_email_parts(invalid_local_parts, valid_domains));
+
+        for email in emails {
+            assert_eq(false /* todo parse email */, false)
+        }
+    }
+}