1 files changed, 133 insertions, 0 deletions

diff --git a/crates/ra_ide/src/syntax_highlighting/tests.rs b/crates/ra_ide/src/syntax_highlighting/tests.rs
new file mode 100644
index 000000000..98c030791
--- /dev/null
+++ b/crates/ra_ide/src/syntax_highlighting/tests.rs
@@ -0,0 +1,133 @@
+use std::fs;
+
+use test_utils::{assert_eq_text, project_dir, read_text};
+
+use crate::{
+    mock_analysis::{single_file, MockAnalysis},
+    FileRange, TextRange,
+};
+
+#[test]
+fn test_highlighting() {
+    let (analysis, file_id) = single_file(
+        r#"
+#[derive(Clone, Debug)]
+struct Foo {
+    pub x: i32,
+    pub y: i32,
+}
+
+fn foo<'a, T>() -> T {
+    foo::<'a, i32>()
+}
+
+macro_rules! def_fn {
+    ($($tt:tt)*) => {$($tt)*}
+}
+
+def_fn! {
+    fn bar() -> u32 {
+        100
+    }
+}
+
+// comment
+fn main() {
+    println!("Hello, {}!", 92);
+
+    let mut vec = Vec::new();
+    if true {
+        let x = 92;
+        vec.push(Foo { x, y: 1 });
+    }
+    unsafe { vec.set_len(0); }
+
+    let mut x = 42;
+    let y = &mut x;
+    let z = &y;
+
+    y;
+}
+
+enum Option<T> {
+    Some(T),
+    None,
+}
+use Option::*;
+
+impl<T> Option<T> {
+    fn and<U>(self, other: Option<U>) -> Option<(T, U)> {
+        match other {
+            None => unimplemented!(),
+            Nope => Nope,
+        }
+    }
+}
+"#
+        .trim(),
+    );
+    let dst_file = project_dir().join("crates/ra_ide/src/snapshots/highlighting.html");
+    let actual_html = &analysis.highlight_as_html(file_id, false).unwrap();
+    let expected_html = &read_text(&dst_file);
+    fs::write(dst_file, &actual_html).unwrap();
+    assert_eq_text!(expected_html, actual_html);
+}
+
+#[test]
+fn test_rainbow_highlighting() {
+    let (analysis, file_id) = single_file(
+        r#"
+fn main() {
+    let hello = "hello";
+    let x = hello.to_string();
+    let y = hello.to_string();
+
+    let x = "other color please!";
+    let y = x.to_string();
+}
+
+fn bar() {
+    let mut hello = "hello";
+}
+"#
+        .trim(),
+    );
+    let dst_file = project_dir().join("crates/ra_ide/src/snapshots/rainbow_highlighting.html");
+    let actual_html = &analysis.highlight_as_html(file_id, true).unwrap();
+    let expected_html = &read_text(&dst_file);
+    fs::write(dst_file, &actual_html).unwrap();
+    assert_eq_text!(expected_html, actual_html);
+}
+
+#[test]
+fn accidentally_quadratic() {
+    let file = project_dir().join("crates/ra_syntax/test_data/accidentally_quadratic");
+    let src = fs::read_to_string(file).unwrap();
+
+    let mut mock = MockAnalysis::new();
+    let file_id = mock.add_file("/main.rs", &src);
+    let host = mock.analysis_host();
+
+    // let t = std::time::Instant::now();
+    let _ = host.analysis().highlight(file_id).unwrap();
+    // eprintln!("elapsed: {:?}", t.elapsed());
+}
+
+#[test]
+fn test_ranges() {
+    let (analysis, file_id) = single_file(
+        r#"
+            #[derive(Clone, Debug)]
+            struct Foo {
+                pub x: i32,
+                pub y: i32,
+            }"#,
+    );
+
+    // The "x"
+    let highlights = &analysis
+        .highlight_range(FileRange { file_id, range: TextRange::offset_len(82.into(), 1.into()) })
+        .unwrap();
+
+    assert_eq!(&highlights[0].highlight.to_string(), "field.declaration");
+}