From f069116b8c71775b3a6c83c247608eabc9b6fec1 Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Fri, 12 Mar 2021 15:33:31 -0500
Subject: add some test scaffolding

---
 .gitignore                          |  1 +
 Cargo.toml                          |  3 ++
 tests/basic.rs                      | 23 +++++++++++
 tests/fixtures/bin/Cargo.toml       |  9 +++++
 tests/fixtures/bin/src/bin/basic.rs |  1 +
 tests/fixtures/mod.rs               | 77 +++++++++++++++++++++++++++++++++++++
 6 files changed, 114 insertions(+)
 create mode 100644 tests/basic.rs
 create mode 100644 tests/fixtures/bin/Cargo.toml
 create mode 120000 tests/fixtures/bin/src/bin/basic.rs
 create mode 100644 tests/fixtures/mod.rs

diff --git a/.gitignore b/.gitignore
index 96ef6c0..dd4ff2a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /target
+/tests/fixtures/bin/target
 Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
index 6fced2f..fe1b835 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,6 +19,9 @@ default = []
 async = ["blocking", "futures-lite"]
 
 [dev-dependencies]
+assert_cmd = "1.0"
+assert_fs = "1.0"
+escargot = "0.5"
 libc = "0.2"
 pty-process = { version = "0.1", features = ["backend-smol"] }
 smol = "1.2"
diff --git a/tests/basic.rs b/tests/basic.rs
new file mode 100644
index 0000000..71ed857
--- /dev/null
+++ b/tests/basic.rs
@@ -0,0 +1,23 @@
+use std::io::Write as _;
+use std::os::unix::io::AsRawFd as _;
+
+mod fixtures;
+
+#[test]
+fn test_basic() {
+    fixtures::run_fixture("basic", true, |pty| {
+        pty.write_all(b"a").unwrap();
+        assert_eq!(fixtures::read(pty), b"\x1b[6;6Hfoo");
+
+        pty.write_all(b"a").unwrap();
+        assert!(!fixtures::read_ready(pty.as_raw_fd()));
+
+        pty.write_all(b"a").unwrap();
+        assert_eq!(
+            fixtures::read(pty),
+            b"\x1b[9;9H\x1b[32mbar\x1b[12;12H\x1b[mbaz"
+        );
+
+        pty.write_all(b"a").unwrap();
+    });
+}
diff --git a/tests/fixtures/bin/Cargo.toml b/tests/fixtures/bin/Cargo.toml
new file mode 100644
index 0000000..83fff5e
--- /dev/null
+++ b/tests/fixtures/bin/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "textmode_tests"
+version = "0.1.0"
+authors = ["Jesse Luehrs <doy@tozt.net>"]
+edition = "2018"
+
+[dependencies]
+textmode = { path = "../../.." }
+vt100 = "*"
diff --git a/tests/fixtures/bin/src/bin/basic.rs b/tests/fixtures/bin/src/bin/basic.rs
new file mode 120000
index 0000000..8cd8f58
--- /dev/null
+++ b/tests/fixtures/bin/src/bin/basic.rs
@@ -0,0 +1 @@
+../../../../../examples/basic.rs
\ No newline at end of file
diff --git a/tests/fixtures/mod.rs b/tests/fixtures/mod.rs
new file mode 100644
index 0000000..766886c
--- /dev/null
+++ b/tests/fixtures/mod.rs
@@ -0,0 +1,77 @@
+use pty_process::Command as _;
+use std::io::Read as _;
+use std::os::unix::io::AsRawFd as _;
+
+pub fn run_fixture<F>(name: &str, screenguard: bool, f: F)
+where
+    F: FnOnce(&mut std::fs::File),
+{
+    let temp = assert_fs::TempDir::new().unwrap();
+    let run = escargot::CargoBuild::new()
+        .bin(name)
+        .current_release()
+        .current_target()
+        .manifest_path("tests/fixtures/bin/Cargo.toml")
+        .target_dir(temp.path())
+        .run()
+        .unwrap();
+    let mut cmd = run.command();
+    let mut child = cmd
+        .spawn_pty(Some(&pty_process::Size::new(24, 80)))
+        .unwrap();
+
+    if screenguard {
+        assert!(read_ready(child.pty().as_raw_fd()));
+        let mut buf = vec![0u8; 1024];
+        let bytes = child.pty().read(&mut buf).unwrap();
+        buf.truncate(bytes);
+        assert_eq!(&buf[..], b"\x1b7\x1b[?47h\x1b[2J\x1b[H\x1b[?25h");
+    }
+
+    f(child.pty_mut());
+
+    if screenguard {
+        assert!(read_ready(child.pty().as_raw_fd()));
+        let mut buf = vec![0u8; 1024];
+        let bytes = child.pty().read(&mut buf).unwrap();
+        buf.truncate(bytes);
+        assert_eq!(&buf[..], b"\x1b[?47l\x1b8\x1b[?25h");
+    }
+
+    let status = child.wait().unwrap();
+    assert!(status.success());
+}
+
+pub fn read(f: &mut std::fs::File) -> Vec<u8> {
+    assert!(read_ready(f.as_raw_fd()));
+    let mut buf = vec![0u8; 1024];
+    let bytes = f.read(&mut buf).unwrap();
+    buf.truncate(bytes);
+    buf
+}
+
+pub fn read_ready(fd: std::os::unix::io::RawFd) -> bool {
+    let mut set = nix::sys::select::FdSet::new();
+    set.insert(fd);
+    let timeout = libc::timeval {
+        tv_sec: 0,
+        tv_usec: 100_000,
+    };
+    let timeout = &mut nix::sys::time::TimeVal::from(timeout);
+    match nix::sys::select::select(
+        None,
+        Some(&mut set),
+        None,
+        None,
+        Some(timeout),
+    ) {
+        Ok(n) => {
+            if n > 0 {
+                set.contains(fd)
+            } else {
+                false
+            }
+        }
+        Err(_) => false,
+    }
+}
-- 
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