rename top level module to satisfy cargo fmt

6 files changed, 610 insertions, 0 deletions

diff --git a/helix-term/tests/test/auto_indent.rs b/helix-term/tests/test/auto_indent.rs
new file mode 100644
index 00000000..8933cb6a
--- /dev/null
+++ b/helix-term/tests/test/auto_indent.rs
@@ -0,0 +1,26 @@
+use super::*;
+
+#[tokio::test]
+async fn auto_indent_c() -> anyhow::Result<()> {
+    test_key_sequence_text_result(
+        Args {
+            files: vec![(PathBuf::from("foo.c"), Position::default())],
+            ..Default::default()
+        },
+        Config::default(),
+        // switches to append mode?
+        (
+            helpers::platform_line("void foo() {#[|}]#").as_ref(),
+            "i<ret><esc>",
+            helpers::platform_line(indoc! {"\
+                void foo() {
+                  #[|\n]#\
+                }
+            "})
+            .as_ref(),
+        ),
+    )
+    .await?;
+
+    Ok(())
+}
diff --git a/helix-term/tests/test/auto_pairs.rs b/helix-term/tests/test/auto_pairs.rs
new file mode 100644
index 00000000..52fee55e
--- /dev/null
+++ b/helix-term/tests/test/auto_pairs.rs
@@ -0,0 +1,26 @@
+use super::*;
+
+#[tokio::test]
+async fn auto_pairs_basic() -> anyhow::Result<()> {
+    test_key_sequence_text_result(
+        Args::default(),
+        Config::default(),
+        ("#[\n|]#", "i(<esc>", "(#[|)]#\n"),
+    )
+    .await?;
+
+    test_key_sequence_text_result(
+        Args::default(),
+        Config {
+            editor: helix_view::editor::Config {
+                auto_pairs: AutoPairConfig::Enable(false),
+                ..Default::default()
+            },
+            ..Default::default()
+        },
+        ("#[\n|]#", "i(<esc>", "(#[|\n]#"),
+    )
+    .await?;
+
+    Ok(())
+}
diff --git a/helix-term/tests/test/commands.rs b/helix-term/tests/test/commands.rs
new file mode 100644
index 00000000..1ff7cc90
--- /dev/null
+++ b/helix-term/tests/test/commands.rs
@@ -0,0 +1,101 @@
+use std::{
+    io::{Read, Write},
+    ops::RangeInclusive,
+};
+
+use helix_core::diagnostic::Severity;
+use helix_term::application::Application;
+
+use super::*;
+
+#[tokio::test]
+async fn test_write_quit_fail() -> anyhow::Result<()> {
+    let file = helpers::new_readonly_tempfile()?;
+
+    test_key_sequence(
+        &mut Application::new(
+            Args {
+                files: vec![(file.path().to_path_buf(), Position::default())],
+                ..Default::default()
+            },
+            Config::default(),
+        )?,
+        Some("ihello<esc>:wq<ret>"),
+        Some(&|app| {
+            assert_eq!(&Severity::Error, app.editor.get_status().unwrap().1);
+        }),
+    )
+    .await?;
+
+    Ok(())
+}
+
+#[tokio::test]
+async fn test_buffer_close() -> anyhow::Result<()> {
+    test_key_sequences(
+        &mut Application::new(Args::default(), Config::default())?,
+        vec![
+            (
+                None,
+                Some(&|app| {
+                    assert_eq!(1, app.editor.documents().count());
+                    assert!(!app.editor.is_err());
+                }),
+            ),
+            (
+                Some("ihello<esc>:new<ret>"),
+                Some(&|app| {
+                    assert_eq!(2, app.editor.documents().count());
+                    assert!(!app.editor.is_err());
+                }),
+            ),
+            (
+                Some(":buffer<minus>close<ret>"),
+                Some(&|app| {
+                    assert_eq!(1, app.editor.documents().count());
+                    assert!(!app.editor.is_err());
+                }),
+            ),
+        ],
+    )
+    .await?;
+
+    // verify if writes are queued up, it finishes them before closing the buffer
+    let mut file = tempfile::NamedTempFile::new()?;
+    let mut command = String::new();
+    const RANGE: RangeInclusive<i32> = 1..=10;
+
+    for i in RANGE {
+        let cmd = format!("%c{}<esc>:w<ret>", i);
+        command.push_str(&cmd);
+    }
+
+    command.push_str(":buffer<minus>close<ret>");
+
+    test_key_sequence(
+        &mut Application::new(
+            Args {
+                files: vec![(file.path().to_path_buf(), Position::default())],
+                ..Default::default()
+            },
+            Config::default(),
+        )?,
+        Some(&command),
+        Some(&|app| {
+            assert!(!app.editor.is_err(), "error: {:?}", app.editor.get_status());
+
+            let doc = app.editor.document_by_path(file.path());
+            assert!(doc.is_none(), "found doc: {:?}", doc);
+        }),
+    )
+    .await?;
+
+    file.as_file_mut().flush()?;
+    file.as_file_mut().sync_all()?;
+
+    let mut file_content = String::new();
+    file.as_file_mut().read_to_string(&mut file_content)?;
+    assert_eq!(RANGE.end().to_string(), file_content);
+
+    Ok(())
+}
diff --git a/helix-term/tests/test/helpers.rs b/helix-term/tests/test/helpers.rs
new file mode 100644
index 00000000..3fe1934f
--- /dev/null
+++ b/helix-term/tests/test/helpers.rs
@@ -0,0 +1,169 @@
+use std::{io::Write, time::Duration};
+
+use anyhow::bail;
+use crossterm::event::{Event, KeyEvent};
+use helix_core::{test, Selection, Transaction};
+use helix_term::{application::Application, args::Args, config::Config};
+use helix_view::{doc, input::parse_macro};
+use tempfile::NamedTempFile;
+use tokio_stream::wrappers::UnboundedReceiverStream;
+
+#[derive(Clone, Debug)]
+pub struct TestCase {
+    pub in_text: String,
+    pub in_selection: Selection,
+    pub in_keys: String,
+    pub out_text: String,
+    pub out_selection: Selection,
+}
+
+impl<S: Into<String>> From<(S, S, S)> for TestCase {
+    fn from((input, keys, output): (S, S, S)) -> Self {
+        let (in_text, in_selection) = test::print(&input.into());
+        let (out_text, out_selection) = test::print(&output.into());
+
+        TestCase {
+            in_text,
+            in_selection,
+            in_keys: keys.into(),
+            out_text,
+            out_selection,
+        }
+    }
+}
+
+#[inline]
+pub async fn test_key_sequence(
+    app: &mut Application,
+    in_keys: Option<&str>,
+    test_fn: Option<&dyn Fn(&Application)>,
+) -> anyhow::Result<()> {
+    test_key_sequences(app, vec![(in_keys, test_fn)]).await
+}
+
+pub async fn test_key_sequences(
+    app: &mut Application,
+    inputs: Vec<(Option<&str>, Option<&dyn Fn(&Application)>)>,
+) -> anyhow::Result<()> {
+    const TIMEOUT: Duration = Duration::from_millis(500);
+    let (tx, rx) = tokio::sync::mpsc::unbounded_channel();
+    let mut rx_stream = UnboundedReceiverStream::new(rx);
+
+    for (in_keys, test_fn) in inputs {
+        if let Some(in_keys) = in_keys {
+            for key_event in parse_macro(&in_keys)?.into_iter() {
+                tx.send(Ok(Event::Key(KeyEvent::from(key_event))))?;
+            }
+        }
+
+        if !app.event_loop_until_idle(&mut rx_stream).await {
+            bail!("application exited before test function could run");
+        }
+
+        if let Some(test) = test_fn {
+            test(app);
+        };
+    }
+
+    for key_event in parse_macro("<esc>:q!<ret>")?.into_iter() {
+        tx.send(Ok(Event::Key(KeyEvent::from(key_event))))?;
+    }
+
+    let event_loop = app.event_loop(&mut rx_stream);
+    tokio::time::timeout(TIMEOUT, event_loop).await?;
+    app.close().await?;
+
+    Ok(())
+}
+
+pub async fn test_key_sequence_with_input_text<T: Into<TestCase>>(
+    app: Option<Application>,
+    test_case: T,
+    test_fn: &dyn Fn(&Application),
+) -> anyhow::Result<()> {
+    let test_case = test_case.into();
+    let mut app = match app {
+        Some(app) => app,
+        None => Application::new(Args::default(), Config::default())?,
+    };
+
+    let (view, doc) = helix_view::current!(app.editor);
+    let sel = doc.selection(view.id).clone();
+
+    // replace the initial text with the input text
+    doc.apply(
+        &Transaction::change_by_selection(&doc.text(), &sel, |_| {
+            (0, doc.text().len_chars(), Some((&test_case.in_text).into()))
+        })
+        .with_selection(test_case.in_selection.clone()),
+        view.id,
+    );
+
+    test_key_sequence(&mut app, Some(&test_case.in_keys), Some(test_fn)).await
+}
+
+/// Use this for very simple test cases where there is one input
+/// document, selection, and sequence of key presses, and you just
+/// want to verify the resulting document and selection.
+pub async fn test_key_sequence_text_result<T: Into<TestCase>>(
+    args: Args,
+    config: Config,
+    test_case: T,
+) -> anyhow::Result<()> {
+    let test_case = test_case.into();
+    let app = Application::new(args, config)?;
+
+    test_key_sequence_with_input_text(Some(app), test_case.clone(), &|app| {
+        let doc = doc!(app.editor);
+        assert_eq!(&test_case.out_text, doc.text());
+
+        let mut selections: Vec<_> = doc.selections().values().cloned().collect();
+        assert_eq!(1, selections.len());
+
+        let sel = selections.pop().unwrap();
+        assert_eq!(test_case.out_selection, sel);
+    })
+    .await
+}
+
+pub fn temp_file_with_contents<S: AsRef<str>>(
+    content: S,
+) -> anyhow::Result<tempfile::NamedTempFile> {
+    let mut temp_file = tempfile::NamedTempFile::new()?;
+
+    temp_file
+        .as_file_mut()
+        .write_all(content.as_ref().as_bytes())?;
+
+    temp_file.flush()?;
+    temp_file.as_file_mut().sync_all()?;
+    Ok(temp_file)
+}
+
+/// Replaces all LF chars with the system's appropriate line feed
+/// character, and if one doesn't exist already, appends the system's
+/// appropriate line ending to the end of a string.
+pub fn platform_line(input: &str) -> String {
+    let line_end = helix_core::DEFAULT_LINE_ENDING.as_str();
+
+    // we can assume that the source files in this code base will always
+    // be LF, so indoc strings will always insert LF
+    let mut output = input.replace("\n", line_end);
+
+    if !output.ends_with(line_end) {
+        output.push_str(line_end);
+    }
+
+    output
+}
+
+/// Creates a new temporary file that is set to read only. Useful for
+/// testing write failures.
+pub fn new_readonly_tempfile() -> anyhow::Result<NamedTempFile> {
+    let mut file = tempfile::NamedTempFile::new()?;
+    let metadata = file.as_file().metadata()?;
+    let mut perms = metadata.permissions();
+    perms.set_readonly(true);
+    file.as_file_mut().set_permissions(perms)?;
+    Ok(file)
+}
diff --git a/helix-term/tests/test/movement.rs b/helix-term/tests/test/movement.rs
new file mode 100644
index 00000000..e0bfc3bf
--- /dev/null
+++ b/helix-term/tests/test/movement.rs
@@ -0,0 +1,135 @@
+use helix_term::application::Application;
+
+use super::*;
+
+#[tokio::test]
+async fn insert_mode_cursor_position() -> anyhow::Result<()> {
+    test_key_sequence_text_result(
+        Args::default(),
+        Config::default(),
+        TestCase {
+            in_text: String::new(),
+            in_selection: Selection::single(0, 0),
+            in_keys: "i".into(),
+            out_text: String::new(),
+            out_selection: Selection::single(0, 0),
+        },
+    )
+    .await?;
+
+    test_key_sequence_text_result(
+        Args::default(),
+        Config::default(),
+        ("#[\n|]#", "i", "#[|\n]#"),
+    )
+    .await?;
+
+    test_key_sequence_text_result(
+        Args::default(),
+        Config::default(),
+        ("#[\n|]#", "i<esc>", "#[|\n]#"),
+    )
+    .await?;
+
+    test_key_sequence_text_result(
+        Args::default(),
+        Config::default(),
+        ("#[\n|]#", "i<esc>i", "#[|\n]#"),
+    )
+    .await?;
+
+    Ok(())
+}
+
+/// Range direction is preserved when escaping insert mode to normal
+#[tokio::test]
+async fn insert_to_normal_mode_cursor_position() -> anyhow::Result<()> {
+    test_key_sequence_text_result(
+        Args::default(),
+        Config::default(),
+        ("#[f|]#oo\n", "vll<A-;><esc>", "#[|foo]#\n"),
+    )
+    .await?;
+
+    test_key_sequence_text_result(
+        Args::default(),
+        Config::default(),
+        (
+            indoc! {"\
+                #[f|]#oo
+                #(b|)#ar"
+            },
+            "vll<A-;><esc>",
+            indoc! {"\
+                #[|foo]#
+                #(|bar)#"
+            },
+        ),
+    )
+    .await?;
+
+    test_key_sequence_text_result(
+        Args::default(),
+        Config::default(),
+        (
+            indoc! {"\
+                #[f|]#oo
+                #(b|)#ar"
+            },
+            "a",
+            indoc! {"\
+                #[fo|]#o
+                #(ba|)#r"
+            },
+        ),
+    )
+    .await?;
+
+    test_key_sequence_text_result(
+        Args::default(),
+        Config::default(),
+        (
+            indoc! {"\
+                #[f|]#oo
+                #(b|)#ar"
+            },
+            "a<esc>",
+            indoc! {"\
+                #[f|]#oo
+                #(b|)#ar"
+            },
+        ),
+    )
+    .await?;
+
+    Ok(())
+}
+
+/// Ensure the very initial cursor in an opened file is the width of
+/// the first grapheme
+#[tokio::test]
+async fn cursor_position_newly_opened_file() -> anyhow::Result<()> {
+    let test = |content: &str, expected_sel: Selection| -> anyhow::Result<()> {
+        let file = helpers::temp_file_with_contents(content)?;
+
+        let mut app = Application::new(
+            Args {
+                files: vec![(file.path().to_path_buf(), Position::default())],
+                ..Default::default()
+            },
+            Config::default(),
+        )?;
+
+        let (view, doc) = helix_view::current!(app.editor);
+        let sel = doc.selection(view.id).clone();
+        assert_eq!(expected_sel, sel);
+
+        Ok(())
+    };
+
+    test("foo", Selection::single(0, 1))?;
+    test("👨‍👩‍👧‍👦 foo", Selection::single(0, 7))?;
+    test("", Selection::single(0, 0))?;
+
+    Ok(())
+}
diff --git a/helix-term/tests/test/write.rs b/helix-term/tests/test/write.rs
new file mode 100644
index 00000000..f3abbd91
--- /dev/null
+++ b/helix-term/tests/test/write.rs
@@ -0,0 +1,153 @@
+use std::{
+    io::{Read, Write},
+    ops::RangeInclusive,
+};
+
+use helix_core::diagnostic::Severity;
+use helix_term::application::Application;
+use helix_view::doc;
+
+use super::*;
+
+#[tokio::test]
+async fn test_write() -> anyhow::Result<()> {
+    let mut file = tempfile::NamedTempFile::new()?;
+
+    test_key_sequence(
+        &mut Application::new(
+            Args {
+                files: vec![(file.path().to_path_buf(), Position::default())],
+                ..Default::default()
+            },
+            Config::default(),
+        )?,
+        Some("ii can eat glass, it will not hurt me<ret><esc>:w<ret>"),
+        None,
+    )
+    .await?;
+
+    file.as_file_mut().flush()?;
+    file.as_file_mut().sync_all()?;
+
+    let mut file_content = String::new();
+    file.as_file_mut().read_to_string(&mut file_content)?;
+    assert_eq!(
+        helpers::platform_line("i can eat glass, it will not hurt me"),
+        file_content
+    );
+
+    Ok(())
+}
+
+#[tokio::test]
+async fn test_write_concurrent() -> anyhow::Result<()> {
+    let mut file = tempfile::NamedTempFile::new()?;
+    let mut command = String::new();
+    const RANGE: RangeInclusive<i32> = 1..=5000;
+
+    for i in RANGE {
+        let cmd = format!("%c{}<esc>:w<ret>", i);
+        command.push_str(&cmd);
+    }
+
+    test_key_sequence(
+        &mut Application::new(
+            Args {
+                files: vec![(file.path().to_path_buf(), Position::default())],
+                ..Default::default()
+            },
+            Config::default(),
+        )?,
+        Some(&command),
+        None,
+    )
+    .await?;
+
+    file.as_file_mut().flush()?;
+    file.as_file_mut().sync_all()?;
+
+    let mut file_content = String::new();
+    file.as_file_mut().read_to_string(&mut file_content)?;
+    assert_eq!(RANGE.end().to_string(), file_content);
+
+    Ok(())
+}
+
+#[tokio::test]
+async fn test_write_fail_mod_flag() -> anyhow::Result<()> {
+    let file = helpers::new_readonly_tempfile()?;
+
+    test_key_sequences(
+        &mut Application::new(
+            Args {
+                files: vec![(file.path().to_path_buf(), Position::default())],
+                ..Default::default()
+            },
+            Config::default(),
+        )?,
+        vec![
+            (
+                None,
+                Some(&|app| {
+                    let doc = doc!(app.editor);
+                    assert!(!doc.is_modified());
+                }),
+            ),
+            (
+                Some("ihello<esc>"),
+                Some(&|app| {
+                    let doc = doc!(app.editor);
+                    assert!(doc.is_modified());
+                }),
+            ),
+            (
+                Some(":w<ret>"),
+                Some(&|app| {
+                    assert_eq!(&Severity::Error, app.editor.get_status().unwrap().1);
+
+                    let doc = doc!(app.editor);
+                    assert!(doc.is_modified());
+                }),
+            ),
+        ],
+    )
+    .await?;
+
+    Ok(())
+}
+
+#[tokio::test]
+async fn test_write_fail_new_path() -> anyhow::Result<()> {
+    let file = helpers::new_readonly_tempfile()?;
+
+    test_key_sequences(
+        &mut Application::new(Args::default(), Config::default())?,
+        vec![
+            (
+                None,
+                Some(&|app| {
+                    let doc = doc!(app.editor);
+                    assert_ne!(
+                        Some(&Severity::Error),
+                        app.editor.get_status().map(|status| status.1)
+                    );
+                    assert_eq!(None, doc.path());
+                }),
+            ),
+            (
+                Some(&format!(":w {}<ret>", file.path().to_string_lossy())),
+                Some(&|app| {
+                    let doc = doc!(app.editor);
+                    assert_eq!(
+                        Some(&Severity::Error),
+                        app.editor.get_status().map(|status| status.1)
+                    );
+                    assert_eq!(None, doc.path());
+                }),
+            ),
+        ],
+    )
+    .await?;
+
+    Ok(())
+}