Test that ui tests actually work

also exposes where it's noisy and hard to actually ui test a crate itself

Author: oli-obk

src/lib.rs

@@ -55,6 +55,25 @@ pub struct Config {
     pub quiet: bool,
 }
 
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            args: vec![],
+            target: None,
+            stderr_filters: vec![],
+            stdout_filters: vec![],
+            root_dir: PathBuf::new(),
+            mode: Mode::Fail,
+            program: PathBuf::from("rustc"),
+            output_conflict_handling: OutputConflictHandling::Error,
+            path_filter: vec![],
+            dependencies_crate_manifest_path: None,
+            dependency_builder: None,
+            quiet: true,
+        }
+    }
+}
+
 #[derive(Debug)]
 pub struct DependencyBuilder {
     pub program: PathBuf,

tests/integration.rs

@@ -0,0 +1,19 @@
+#[test]
+fn integrations() {
+    run("basic");
+}
+
+fn run(name: &str) {
+    let path = std::path::Path::new(file!()).parent().unwrap();
+
+    let mut cmd = std::process::Command::new(std::env::var_os("CARGO").unwrap());
+    cmd.arg("test");
+
+    cmd.arg("--target-dir");
+    cmd.arg(path.parent().unwrap().join("target"));
+
+    cmd.arg("--manifest-path");
+    cmd.arg(format!("{}/integrations/{name}/Cargo.toml", path.display()));
+
+    assert!(cmd.status().unwrap().success());
+}