1 files changed, 33 insertions, 0 deletions
diff --git a/tests/ui-fulldeps/compiler-calls.rs b/tests/ui-fulldeps/compiler-calls.rs
new file mode 100644
index 000000000..a9520b592
--- /dev/null
+++ b/tests/ui-fulldeps/compiler-calls.rs
@@ -0,0 +1,33 @@
+// run-pass
+// Test that the Callbacks interface to the compiler works.
+
+// ignore-cross-compile
+// ignore-stage1
+// ignore-remote
+
+#![feature(rustc_private)]
+
+extern crate rustc_driver;
+extern crate rustc_interface;
+
+use rustc_interface::interface;
+
+struct TestCalls<'a> {
+    count: &'a mut u32
+}
+
+impl rustc_driver::Callbacks for TestCalls<'_> {
+    fn config(&mut self, _config: &mut interface::Config) {
+        *self.count *= 2;
+    }
+}
+
+fn main() {
+    let mut count = 1;
+    let args = vec!["compiler-calls".to_string(), "foo.rs".to_string()];
+    rustc_driver::catch_fatal_errors(|| {
+        rustc_driver::RunCompiler::new(&args, &mut TestCalls { count: &mut count }).run().ok();
+    })
+    .ok();
+    assert_eq!(count, 2);
+}