Finalize Aerogramme's refactor

3 files changed, 723 insertions, 0 deletions

diff --git a/aerogramme/tests/common/constants.rs b/aerogramme/tests/common/constants.rs
new file mode 100644
index 0000000..c11a04d
--- /dev/null
+++ b/aerogramme/tests/common/constants.rs
@@ -0,0 +1,54 @@
+use std::time;
+
+pub static SMALL_DELAY: time::Duration = time::Duration::from_millis(200);
+
+pub static EMAIL1: &[u8] = b"Date: Sat, 8 Jul 2023 07:14:29 +0200\r
+From: Bob Robert <bob@example.tld>\r
+To: Alice Malice <alice@example.tld>\r
+CC: =?ISO-8859-1?Q?Andr=E9?= Pirard <PIRARD@vm1.ulg.ac.be>\r
+Subject: =?ISO-8859-1?B?SWYgeW91IGNhbiByZWFkIHRoaXMgeW8=?=\r
+    =?ISO-8859-2?B?dSB1bmRlcnN0YW5kIHRoZSBleGFtcGxlLg==?=\r
+X-Unknown: something something\r
+Bad entry\r
+  on multiple lines\r
+Message-ID: <NTAxNzA2AC47634Y366BAMTY4ODc5MzQyODY0ODY5@www.grrrndzero.org>\r
+MIME-Version: 1.0\r
+Content-Type: multipart/alternative;\r
+ boundary=\"b1_e376dc71bafc953c0b0fdeb9983a9956\"\r
+Content-Transfer-Encoding: 7bit\r
+\r
+This is a multi-part message in MIME format.\r
+\r
+--b1_e376dc71bafc953c0b0fdeb9983a9956\r
+Content-Type: text/plain; charset=utf-8\r
+Content-Transfer-Encoding: quoted-printable\r
+\r
+GZ\r
+OoOoO\r
+oOoOoOoOo\r
+oOoOoOoOoOoOoOoOo\r
+oOoOoOoOoOoOoOoOoOoOoOo\r
+oOoOoOoOoOoOoOoOoOoOoOoOoOoOo\r
+OoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoO\r
+\r
+--b1_e376dc71bafc953c0b0fdeb9983a9956\r
+Content-Type: text/html; charset=us-ascii\r
+\r
+<div style=\"text-align: center;\"><strong>GZ</strong><br />\r
+OoOoO<br />\r
+oOoOoOoOo<br />\r
+oOoOoOoOoOoOoOoOo<br />\r
+oOoOoOoOoOoOoOoOoOoOoOo<br />\r
+oOoOoOoOoOoOoOoOoOoOoOoOoOoOo<br />\r
+OoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoO<br />\r
+</div>\r
+\r
+--b1_e376dc71bafc953c0b0fdeb9983a9956--\r
+";
+
+pub static EMAIL2: &[u8] = b"From: alice@example.com\r
+To: alice@example.tld\r
+Subject: Test\r
+\r
+Hello world!\r
+";
diff --git a/aerogramme/tests/common/fragments.rs b/aerogramme/tests/common/fragments.rs
new file mode 100644
index 0000000..606af2b
--- /dev/null
+++ b/aerogramme/tests/common/fragments.rs
@@ -0,0 +1,570 @@
+use anyhow::{bail, Result};
+use std::io::Write;
+use std::net::TcpStream;
+use std::thread;
+
+use crate::common::constants::*;
+use crate::common::*;
+
+/// These fragments are not a generic IMAP client
+/// but specialized to our specific tests. They can't take
+/// arbitrary values, only enum for which the code is known
+/// to be correct. The idea is that the generated message is more
+/// or less hardcoded by the developer, so its clear what's expected,
+/// and not generated by a library. Also don't use vector of enum,
+/// as it again introduce some kind of genericity we try so hard to avoid:
+/// instead add a dedicated enum, for example "All" or anything relaevent that would
+/// describe your list and then hardcode it in your fragment.
+/// DON'T. TRY. TO. BE. GENERIC. HERE.
+
+pub fn connect(imap: &mut TcpStream) -> Result<()> {
+    let mut buffer: [u8; 1500] = [0; 1500];
+
+    let read = read_lines(imap, &mut buffer, None)?;
+    assert_eq!(&read[..4], &b"* OK"[..]);
+
+    Ok(())
+}
+
+pub enum Account {
+    Alice,
+}
+
+pub enum Extension {
+    None,
+    Unselect,
+    Move,
+    Condstore,
+    LiteralPlus,
+    Idle,
+    UidPlus,
+    ListStatus,
+}
+
+pub enum Enable {
+    Utf8Accept,
+    CondStore,
+    All,
+}
+
+pub enum Mailbox {
+    Inbox,
+    Archive,
+    Drafts,
+}
+
+pub enum Flag {
+    Deleted,
+    Important,
+}
+
+pub enum Email {
+    Basic,
+    Multipart,
+}
+
+pub enum Selection {
+    FirstId,
+    SecondId,
+    All,
+}
+
+pub enum SelectMod {
+    None,
+    Condstore,
+}
+
+pub enum StoreAction {
+    AddFlags,
+    DelFlags,
+    SetFlags,
+    AddFlagsSilent,
+    DelFlagsSilent,
+    SetFlagsSilent,
+}
+
+pub enum StoreMod {
+    None,
+    UnchangedSince(u64),
+}
+
+pub enum FetchKind {
+    Rfc822,
+    Rfc822Size,
+}
+
+pub enum FetchMod {
+    None,
+    ChangedSince(u64),
+}
+
+pub enum SearchKind<'a> {
+    Text(&'a str),
+    ModSeq(u64),
+}
+
+pub enum StatusKind {
+    UidNext,
+    HighestModSeq,
+}
+
+pub enum MbxSelect {
+    All,
+}
+
+pub enum ListReturn {
+    None,
+    StatusMessagesUnseen,
+}
+
+pub fn capability(imap: &mut TcpStream, ext: Extension) -> Result<()> {
+    imap.write(&b"5 capability\r\n"[..])?;
+
+    let maybe_ext = match ext {
+        Extension::None => None,
+        Extension::Unselect => Some("UNSELECT"),
+        Extension::Move => Some("MOVE"),
+        Extension::Condstore => Some("CONDSTORE"),
+        Extension::LiteralPlus => Some("LITERAL+"),
+        Extension::Idle => Some("IDLE"),
+        Extension::UidPlus => Some("UIDPLUS"),
+        Extension::ListStatus => Some("LIST-STATUS"),
+    };
+
+    let mut buffer: [u8; 6000] = [0; 6000];
+    let read = read_lines(imap, &mut buffer, Some(&b"5 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+    assert!(srv_msg.contains("IMAP4REV1"));
+    if let Some(ext) = maybe_ext {
+        assert!(srv_msg.contains(ext));
+    }
+
+    Ok(())
+}
+
+pub fn login(imap: &mut TcpStream, account: Account) -> Result<()> {
+    let mut buffer: [u8; 1500] = [0; 1500];
+
+    assert!(matches!(account, Account::Alice));
+    imap.write(&b"10 login alice hunter2\r\n"[..])?;
+
+    let read = read_lines(imap, &mut buffer, None)?;
+    assert_eq!(&read[..5], &b"10 OK"[..]);
+
+    Ok(())
+}
+
+pub fn login_with_literal(imap: &mut TcpStream, account: Account) -> Result<()> {
+    let mut buffer: [u8; 1500] = [0; 1500];
+
+    assert!(matches!(account, Account::Alice));
+    imap.write(&b"10 login {5+}\r\nalice {7+}\r\nhunter2\r\n"[..])?;
+    let _read = read_lines(imap, &mut buffer, Some(&b"10 OK"[..]))?;
+    Ok(())
+}
+
+pub fn create_mailbox(imap: &mut TcpStream, mbx: Mailbox) -> Result<()> {
+    let mut buffer: [u8; 1500] = [0; 1500];
+
+    let mbx_str = match mbx {
+        Mailbox::Inbox => "INBOX",
+        Mailbox::Archive => "ArchiveCustom",
+        Mailbox::Drafts => "DraftsCustom",
+    };
+
+    let cmd = format!("15 create {}\r\n", mbx_str);
+    imap.write(cmd.as_bytes())?;
+    let read = read_lines(imap, &mut buffer, None)?;
+    assert_eq!(&read[..12], &b"15 OK CREATE"[..]);
+
+    Ok(())
+}
+
+pub fn list(imap: &mut TcpStream, select: MbxSelect, mod_return: ListReturn) -> Result<String> {
+    let mut buffer: [u8; 6000] = [0; 6000];
+
+    let select_str = match select {
+        MbxSelect::All => "%",
+    };
+
+    let mod_return_str = match mod_return {
+        ListReturn::None => "",
+        ListReturn::StatusMessagesUnseen => " RETURN (STATUS (MESSAGES UNSEEN))",
+    };
+
+    imap.write(format!("19 LIST \"\" \"{}\"{}\r\n", select_str, mod_return_str).as_bytes())?;
+
+    let read = read_lines(imap, &mut buffer, Some(&b"19 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+    Ok(srv_msg.to_string())
+}
+
+pub fn select(imap: &mut TcpStream, mbx: Mailbox, modifier: SelectMod) -> Result<String> {
+    let mut buffer: [u8; 6000] = [0; 6000];
+
+    let mbx_str = match mbx {
+        Mailbox::Inbox => "INBOX",
+        Mailbox::Archive => "ArchiveCustom",
+        Mailbox::Drafts => "DraftsCustom",
+    };
+
+    let mod_str = match modifier {
+        SelectMod::Condstore => " (CONDSTORE)",
+        SelectMod::None => "",
+    };
+
+    imap.write(format!("20 select {}{}\r\n", mbx_str, mod_str).as_bytes())?;
+
+    let read = read_lines(imap, &mut buffer, Some(&b"20 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+
+    Ok(srv_msg.to_string())
+}
+
+pub fn unselect(imap: &mut TcpStream) -> Result<()> {
+    imap.write(&b"70 unselect\r\n"[..])?;
+    let mut buffer: [u8; 1500] = [0; 1500];
+    let _read = read_lines(imap, &mut buffer, Some(&b"70 OK"[..]))?;
+
+    Ok(())
+}
+
+pub fn check(imap: &mut TcpStream) -> Result<()> {
+    let mut buffer: [u8; 1500] = [0; 1500];
+
+    imap.write(&b"21 check\r\n"[..])?;
+    let _read = read_lines(imap, &mut buffer, Some(&b"21 OK"[..]))?;
+
+    Ok(())
+}
+
+pub fn status(imap: &mut TcpStream, mbx: Mailbox, sk: StatusKind) -> Result<String> {
+    let mbx_str = match mbx {
+        Mailbox::Inbox => "INBOX",
+        Mailbox::Archive => "ArchiveCustom",
+        Mailbox::Drafts => "DraftsCustom",
+    };
+    let sk_str = match sk {
+        StatusKind::UidNext => "(UIDNEXT)",
+        StatusKind::HighestModSeq => "(HIGHESTMODSEQ)",
+    };
+    imap.write(format!("25 STATUS {} {}\r\n", mbx_str, sk_str).as_bytes())?;
+    let mut buffer: [u8; 6000] = [0; 6000];
+    let read = read_lines(imap, &mut buffer, Some(&b"25 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+
+    Ok(srv_msg.to_string())
+}
+
+pub fn lmtp_handshake(lmtp: &mut TcpStream) -> Result<()> {
+    let mut buffer: [u8; 1500] = [0; 1500];
+
+    let _read = read_lines(lmtp, &mut buffer, None)?;
+    assert_eq!(&buffer[..4], &b"220 "[..]);
+
+    lmtp.write(&b"LHLO example.tld\r\n"[..])?;
+    let _read = read_lines(lmtp, &mut buffer, Some(&b"250 "[..]))?;
+
+    Ok(())
+}
+
+pub fn lmtp_deliver_email(lmtp: &mut TcpStream, email_type: Email) -> Result<()> {
+    let mut buffer: [u8; 1500] = [0; 1500];
+
+    let email = match email_type {
+        Email::Basic => EMAIL2,
+        Email::Multipart => EMAIL1,
+    };
+    lmtp.write(&b"MAIL FROM:<bob@example.tld>\r\n"[..])?;
+    let _read = read_lines(lmtp, &mut buffer, Some(&b"250 2.0.0"[..]))?;
+
+    lmtp.write(&b"RCPT TO:<alice@example.tld>\r\n"[..])?;
+    let _read = read_lines(lmtp, &mut buffer, Some(&b"250 2.1.5"[..]))?;
+
+    lmtp.write(&b"DATA\r\n"[..])?;
+    let _read = read_lines(lmtp, &mut buffer, Some(&b"354 "[..]))?;
+
+    lmtp.write(email)?;
+    lmtp.write(&b"\r\n.\r\n"[..])?;
+    let _read = read_lines(lmtp, &mut buffer, Some(&b"250 2.0.0"[..]))?;
+
+    Ok(())
+}
+
+pub fn noop_exists(imap: &mut TcpStream, must_exists: u32) -> Result<()> {
+    let mut buffer: [u8; 6000] = [0; 6000];
+
+    let mut max_retry = 20;
+    loop {
+        max_retry -= 1;
+        imap.write(&b"30 NOOP\r\n"[..])?;
+        let read = read_lines(imap, &mut buffer, Some(&b"30 OK"[..]))?;
+        let srv_msg = std::str::from_utf8(read)?;
+
+        for line in srv_msg.lines() {
+            if line.contains("EXISTS") {
+                let got = read_first_u32(line)?;
+                if got == must_exists {
+                    // Done
+                    return Ok(());
+                }
+            }
+        }
+
+        if max_retry <= 0 {
+            // Failed
+            bail!("no more retry");
+        }
+
+        thread::sleep(SMALL_DELAY);
+    }
+}
+
+pub fn fetch(
+    imap: &mut TcpStream,
+    selection: Selection,
+    kind: FetchKind,
+    modifier: FetchMod,
+) -> Result<String> {
+    let mut buffer: [u8; 65535] = [0; 65535];
+
+    let sel_str = match selection {
+        Selection::FirstId => "1",
+        Selection::SecondId => "2",
+        Selection::All => "1:*",
+    };
+
+    let kind_str = match kind {
+        FetchKind::Rfc822 => "RFC822",
+        FetchKind::Rfc822Size => "RFC822.SIZE",
+    };
+
+    let mod_str = match modifier {
+        FetchMod::None => "".into(),
+        FetchMod::ChangedSince(val) => format!(" (CHANGEDSINCE {})", val),
+    };
+
+    imap.write(format!("40 fetch {} {}{}\r\n", sel_str, kind_str, mod_str).as_bytes())?;
+
+    let read = read_lines(imap, &mut buffer, Some(&b"40 OK FETCH"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+
+    Ok(srv_msg.to_string())
+}
+
+pub fn copy(imap: &mut TcpStream, selection: Selection, to: Mailbox) -> Result<String> {
+    let mut buffer: [u8; 65535] = [0; 65535];
+    assert!(matches!(selection, Selection::FirstId));
+    assert!(matches!(to, Mailbox::Archive));
+
+    imap.write(&b"45 copy 1 ArchiveCustom\r\n"[..])?;
+    let read = read_lines(imap, &mut buffer, None)?;
+    assert_eq!(&read[..5], &b"45 OK"[..]);
+    let srv_msg = std::str::from_utf8(read)?;
+
+    Ok(srv_msg.to_string())
+}
+
+pub fn append(imap: &mut TcpStream, content: Email) -> Result<String> {
+    let mut buffer: [u8; 6000] = [0; 6000];
+
+    let ref_mail = match content {
+        Email::Multipart => EMAIL1,
+        Email::Basic => EMAIL2,
+    };
+
+    let append_cmd = format!("47 append inbox (\\Seen) {{{}}}\r\n", ref_mail.len());
+    println!("append cmd: {}", append_cmd);
+    imap.write(append_cmd.as_bytes())?;
+
+    // wait for continuation
+    let read = read_lines(imap, &mut buffer, None)?;
+    assert_eq!(read[0], b'+');
+
+    // write our stuff
+    imap.write(ref_mail)?;
+    imap.write(&b"\r\n"[..])?;
+    let read = read_lines(imap, &mut buffer, Some(&b"47 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+
+    Ok(srv_msg.to_string())
+}
+
+pub fn search(imap: &mut TcpStream, sk: SearchKind) -> Result<String> {
+    let sk_str = match sk {
+        SearchKind::Text(x) => format!("TEXT \"{}\"", x),
+        SearchKind::ModSeq(x) => format!("MODSEQ {}", x),
+    };
+    imap.write(format!("55 SEARCH {}\r\n", sk_str).as_bytes())?;
+    let mut buffer: [u8; 1500] = [0; 1500];
+    let read = read_lines(imap, &mut buffer, Some(&b"55 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+    Ok(srv_msg.to_string())
+}
+
+pub fn store(
+    imap: &mut TcpStream,
+    sel: Selection,
+    flag: Flag,
+    action: StoreAction,
+    modifier: StoreMod,
+) -> Result<String> {
+    let mut buffer: [u8; 6000] = [0; 6000];
+
+    let seq = match sel {
+        Selection::FirstId => "1",
+        Selection::SecondId => "2",
+        Selection::All => "1:*",
+    };
+
+    let modif = match modifier {
+        StoreMod::None => "".into(),
+        StoreMod::UnchangedSince(val) => format!(" (UNCHANGEDSINCE {})", val),
+    };
+
+    let flags_str = match flag {
+        Flag::Deleted => "(\\Deleted)",
+        Flag::Important => "(\\Important)",
+    };
+
+    let action_str = match action {
+        StoreAction::AddFlags => "+FLAGS",
+        StoreAction::DelFlags => "-FLAGS",
+        StoreAction::SetFlags => "FLAGS",
+        StoreAction::AddFlagsSilent => "+FLAGS.SILENT",
+        StoreAction::DelFlagsSilent => "-FLAGS.SILENT",
+        StoreAction::SetFlagsSilent => "FLAGS.SILENT",
+    };
+
+    imap.write(format!("57 STORE {}{} {} {}\r\n", seq, modif, action_str, flags_str).as_bytes())?;
+    let read = read_lines(imap, &mut buffer, Some(&b"57 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+    Ok(srv_msg.to_string())
+}
+
+pub fn expunge(imap: &mut TcpStream) -> Result<()> {
+    imap.write(&b"60 expunge\r\n"[..])?;
+    let mut buffer: [u8; 1500] = [0; 1500];
+    let _read = read_lines(imap, &mut buffer, Some(&b"60 OK EXPUNGE"[..]))?;
+
+    Ok(())
+}
+
+pub fn uid_expunge(imap: &mut TcpStream, sel: Selection) -> Result<String> {
+    use Selection::*;
+    let mut buffer: [u8; 6000] = [0; 6000];
+    let selstr = match sel {
+        FirstId => "1",
+        SecondId => "2",
+        All => "1:*",
+    };
+    imap.write(format!("61 UID EXPUNGE {}\r\n", selstr).as_bytes())?;
+    let read = read_lines(imap, &mut buffer, Some(&b"61 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+    Ok(srv_msg.to_string())
+}
+
+pub fn rename_mailbox(imap: &mut TcpStream, from: Mailbox, to: Mailbox) -> Result<()> {
+    assert!(matches!(from, Mailbox::Archive));
+    assert!(matches!(to, Mailbox::Drafts));
+
+    imap.write(&b"70 rename ArchiveCustom DraftsCustom\r\n"[..])?;
+    let mut buffer: [u8; 1500] = [0; 1500];
+    let read = read_lines(imap, &mut buffer, None)?;
+    assert_eq!(&read[..5], &b"70 OK"[..]);
+
+    imap.write(&b"71 list \"\" *\r\n"[..])?;
+    let read = read_lines(imap, &mut buffer, Some(&b"71 OK LIST"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+    assert!(!srv_msg.contains(" ArchiveCustom\r\n"));
+    assert!(srv_msg.contains(" INBOX\r\n"));
+    assert!(srv_msg.contains(" DraftsCustom\r\n"));
+
+    Ok(())
+}
+
+pub fn delete_mailbox(imap: &mut TcpStream, mbx: Mailbox) -> Result<()> {
+    let mbx_str = match mbx {
+        Mailbox::Inbox => "INBOX",
+        Mailbox::Archive => "ArchiveCustom",
+        Mailbox::Drafts => "DraftsCustom",
+    };
+    let cmd = format!("80 delete {}\r\n", mbx_str);
+
+    imap.write(cmd.as_bytes())?;
+    let mut buffer: [u8; 1500] = [0; 1500];
+    let read = read_lines(imap, &mut buffer, None)?;
+    assert_eq!(&read[..5], &b"80 OK"[..]);
+
+    imap.write(&b"81 list \"\" *\r\n"[..])?;
+    let read = read_lines(imap, &mut buffer, Some(&b"81 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+    assert!(srv_msg.contains(" INBOX\r\n"));
+    assert!(!srv_msg.contains(format!(" {}\r\n", mbx_str).as_str()));
+
+    Ok(())
+}
+
+pub fn close(imap: &mut TcpStream) -> Result<()> {
+    imap.write(&b"60 close\r\n"[..])?;
+    let mut buffer: [u8; 1500] = [0; 1500];
+    let _read = read_lines(imap, &mut buffer, Some(&b"60 OK"[..]))?;
+
+    Ok(())
+}
+
+pub fn r#move(imap: &mut TcpStream, selection: Selection, to: Mailbox) -> Result<String> {
+    let mut buffer: [u8; 1500] = [0; 1500];
+    assert!(matches!(to, Mailbox::Archive));
+    assert!(matches!(selection, Selection::FirstId));
+
+    imap.write(&b"35 move 1 ArchiveCustom\r\n"[..])?;
+    let read = read_lines(imap, &mut buffer, Some(&b"35 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+    assert!(srv_msg.contains("* 1 EXPUNGE"));
+
+    Ok(srv_msg.to_string())
+}
+
+pub fn enable(imap: &mut TcpStream, ask: Enable, done: Option<Enable>) -> Result<()> {
+    let mut buffer: [u8; 6000] = [0; 6000];
+    assert!(matches!(ask, Enable::Utf8Accept));
+
+    imap.write(&b"36 enable UTF8=ACCEPT\r\n"[..])?;
+    let read = read_lines(imap, &mut buffer, Some(&b"36 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+    match done {
+        None => assert_eq!(srv_msg.lines().count(), 1),
+        Some(Enable::Utf8Accept) => {
+            assert_eq!(srv_msg.lines().count(), 2);
+            assert!(srv_msg.contains("* ENABLED UTF8=ACCEPT"));
+        }
+        _ => unimplemented!(),
+    }
+
+    Ok(())
+}
+
+pub fn start_idle(imap: &mut TcpStream) -> Result<()> {
+    let mut buffer: [u8; 1500] = [0; 1500];
+    imap.write(&b"98 IDLE\r\n"[..])?;
+    let read = read_lines(imap, &mut buffer, None)?;
+    assert_eq!(read[0], b'+');
+    Ok(())
+}
+
+pub fn stop_idle(imap: &mut TcpStream) -> Result<String> {
+    let mut buffer: [u8; 16536] = [0; 16536];
+    imap.write(&b"DONE\r\n"[..])?;
+    let read = read_lines(imap, &mut buffer, Some(&b"98 OK"[..]))?;
+    let srv_msg = std::str::from_utf8(read)?;
+    Ok(srv_msg.to_string())
+}
+
+pub fn logout(imap: &mut TcpStream) -> Result<()> {
+    imap.write(&b"99 logout\r\n"[..])?;
+    let mut buffer: [u8; 1500] = [0; 1500];
+    let read = read_lines(imap, &mut buffer, None)?;
+    assert_eq!(&read[..5], &b"* BYE"[..]);
+    Ok(())
+}
diff --git a/aerogramme/tests/common/mod.rs b/aerogramme/tests/common/mod.rs
new file mode 100644
index 0000000..cbe0271
--- /dev/null
+++ b/aerogramme/tests/common/mod.rs
@@ -0,0 +1,99 @@
+#![allow(dead_code)]
+pub mod constants;
+pub mod fragments;
+
+use anyhow::{bail, Context, Result};
+use std::io::Read;
+use std::net::{Shutdown, TcpStream};
+use std::process::Command;
+use std::thread;
+
+use constants::SMALL_DELAY;
+
+pub fn aerogramme_provider_daemon_dev(
+    mut fx: impl FnMut(&mut TcpStream, &mut TcpStream) -> Result<()>,
+) -> Result<()> {
+    // Check port is not used (= free) before starting the test
+    let mut max_retry = 20;
+    loop {
+        max_retry -= 1;
+        match (TcpStream::connect("[::1]:1143"), max_retry) {
+            (Ok(_), 0) => bail!("something is listening on [::1]:1143 and prevent the test from starting"),
+            (Ok(_), _) => println!("something is listening on [::1]:1143, maybe a previous daemon quitting, retrying soon..."),
+            (Err(_), _) => {
+                println!("test ready to start, [::1]:1143 is free!");
+                break
+            }
+        }
+        thread::sleep(SMALL_DELAY);
+    }
+
+    // Start daemon
+    let mut daemon = Command::new(env!("CARGO_BIN_EXE_aerogramme"))
+        .arg("--dev")
+        .arg("provider")
+        .arg("daemon")
+        .spawn()?;
+
+    // Check that our daemon is correctly listening on the free port
+    let mut max_retry = 20;
+    let mut imap_socket = loop {
+        max_retry -= 1;
+        match (TcpStream::connect("[::1]:1143"), max_retry) {
+            (Err(e), 0) => bail!("no more retry, last error is: {}", e),
+            (Err(e), _) => {
+                println!("unable to connect: {} ; will retry soon...", e);
+            }
+            (Ok(v), _) => break v,
+        }
+        thread::sleep(SMALL_DELAY);
+    };
+
+    // Assuming now it's safe to open a LMTP socket
+    let mut lmtp_socket =
+        TcpStream::connect("[::1]:1025").context("lmtp socket must be connected")?;
+
+    println!("-- ready to test imap features --");
+    let result = fx(&mut imap_socket, &mut lmtp_socket);
+    println!("-- test teardown --");
+
+    imap_socket
+        .shutdown(Shutdown::Both)
+        .context("closing imap socket at the end of the test")?;
+    lmtp_socket
+        .shutdown(Shutdown::Both)
+        .context("closing lmtp socket at the end of the test")?;
+    daemon.kill().context("daemon should be killed")?;
+
+    result.context("all tests passed")
+}
+
+pub fn read_lines<'a, F: Read>(
+    reader: &mut F,
+    buffer: &'a mut [u8],
+    stop_marker: Option<&[u8]>,
+) -> Result<&'a [u8]> {
+    let mut nbytes = 0;
+    loop {
+        nbytes += reader.read(&mut buffer[nbytes..])?;
+        //println!("partial read: {}", std::str::from_utf8(&buffer[..nbytes])?);
+        let pre_condition = match stop_marker {
+            None => true,
+            Some(mark) => buffer[..nbytes].windows(mark.len()).any(|w| w == mark),
+        };
+        if pre_condition && nbytes >= 2 && &buffer[nbytes - 2..nbytes] == &b"\r\n"[..] {
+            break;
+        }
+    }
+    println!("read: {}", std::str::from_utf8(&buffer[..nbytes])?);
+    Ok(&buffer[..nbytes])
+}
+
+pub fn read_first_u32(inp: &str) -> Result<u32> {
+    Ok(inp
+        .chars()
+        .skip_while(|c| !c.is_digit(10))
+        .take_while(|c| c.is_digit(10))
+        .collect::<String>()
+        .parse::<u32>()?)
+}