2 files changed, 56 insertions, 0 deletions

diff --git a/libeditor/src/lib.rs b/libeditor/src/lib.rs
index ef31efe35..387859d4a 100644
--- a/libeditor/src/lib.rs
+++ b/libeditor/src/lib.rs
@@ -26,6 +26,18 @@ pub struct Symbol {
     pub range: TextRange,
 }
 
+#[derive(Debug)]
+pub struct Runnable {
+    pub range: TextRange,
+    pub kind: RunnableKind,
+}
+
+#[derive(Debug)]
+pub enum RunnableKind {
+    Test { name: String },
+    Bin,
+}
+
 impl File {
     pub fn new(text: &str) -> File {
         File {
@@ -78,6 +90,28 @@ impl File {
         let syntax = self.inner.syntax();
         extend_selection::extend_selection(syntax.as_ref(), range)
     }
+
+    pub fn runnables(&self) -> Vec<Runnable> {
+        self.inner
+            .functions()
+            .filter_map(|f| {
+                let name = f.name()?.text();
+                let kind = if name == "main" {
+                    RunnableKind::Bin
+                } else if f.has_atom_attr("test") {
+                    RunnableKind::Test {
+                        name: name.to_string()
+                    }
+                } else {
+                    return None;
+                };
+                Some(Runnable {
+                    range: f.syntax().range(),
+                    kind,
+                })
+            })
+            .collect()
+    }
 }
 
 
diff --git a/libeditor/tests/test.rs b/libeditor/tests/test.rs
index e1c8aee4b..ab8254d16 100644
--- a/libeditor/tests/test.rs
+++ b/libeditor/tests/test.rs
@@ -37,11 +37,33 @@ fn main() {}
     );
 }
 
+#[test]
+fn test_runnables() {
+    let file = file(r#"
+fn main() {}
+
+#[test]
+fn test_foo() {}
+
+#[test]
+#[ignore]
+fn test_foo() {}
+"#);
+    let runnables = file.runnables();
+    dbg_eq(
+        &runnables,
+        r#"[Runnable { range: [1; 13), kind: Bin },
+            Runnable { range: [15; 39), kind: Test { name: "test_foo" } },
+            Runnable { range: [41; 75), kind: Test { name: "test_foo" } }]"#,
+    )
+}
+
 fn file(text: &str) -> File {
     File::new(text)
 }
 
 fn dbg_eq(actual: &impl fmt::Debug, expected: &str) {
+    let actual = format!("{:?}", actual);
     let expected = expected.lines().map(|l| l.trim()).join(" ");
     assert_eq!(actual, expected);
 }