Fix compile-test tests to work with the new ui_test crate

Author: flip1995

tests/compile-test.rs

@@ -31,7 +31,7 @@ fn base_config(test_dir: &str) -> compiletest::Config {
         },
         dependencies_crate_manifest_path: Some("clippy_test_deps/Cargo.toml".into()),
         target: None,
-        out_dir: "target/ui_test".into(),
+        out_dir: PathBuf::from(std::env::var_os("CARGO_TARGET_DIR").unwrap_or("target".into())).join("ui_test"),
         ..compiletest::Config::rustc(Path::new("tests").join(test_dir))
     };
 
@@ -116,10 +116,7 @@ fn run_ui_toml() {
 
     config.stderr_filter(
         &regex::escape(
-            &std::path::Path::new(file!())
-                .parent()
-                .unwrap()
-                .canonicalize()
+            &fs::canonicalize("tests")
                 .unwrap()
                 .parent()
                 .unwrap()
@@ -175,10 +172,7 @@ fn run_ui_cargo() {
 
     config.stderr_filter(
         &regex::escape(
-            &std::path::Path::new(file!())
-                .parent()
-                .unwrap()
-                .canonicalize()
+            &fs::canonicalize("tests")
                 .unwrap()
                 .parent()
                 .unwrap()