BDD pattern is clarified

1 files changed, 90 insertions, 0 deletions

diff --git a/tests/common/mod.rs b/tests/common/mod.rs
new file mode 100644
index 0000000..d0f4ed8
--- /dev/null
+++ b/tests/common/mod.rs
@@ -0,0 +1,90 @@
+#![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 && &buffer[nbytes - 2..nbytes] == &b"\r\n"[..] {
+            break;
+        }
+    }
+    println!("read: {}", std::str::from_utf8(&buffer[..nbytes])?);
+    Ok(&buffer[..nbytes])
+}