fix test_integrations_pytest: fetch CARGO_MANIFEST_DIR at runtime (#571)

* fix test_integrations_pytest: fetch CARGO_MANIFEST_DIR at runtime

* fix current dir for script

* fix issue with UNC path in windows

Cargo.toml

@@ -90,6 +90,7 @@ serial_test = "0.5"
 trycmd = "0.14"
 const_format = "0.2.30"
 maplit = "1.0"
+dunce = "1.0.4"
 
 [profile.release]
 debug = "line-tables-only"

tests/test_integrations.rs

@@ -1,16 +1,16 @@
-use std::process::Command;
-
-macro_rules! pytest_dir {
-    () => {
-        concat!(env!("CARGO_MANIFEST_DIR"), "/pytest")
-    };
-}
+use std::{env, error::Error, path::PathBuf, process::Command};
 
 #[test]
-fn test_integrations_pytest() -> std::io::Result<()> {
+fn test_integrations_pytest() -> Result<(), Box<dyn Error>> {
+    let cargo_manifest_dir = dunce::canonicalize(PathBuf::from(env::var("CARGO_MANIFEST_DIR")?))?;
+    let live_test = cargo_manifest_dir.join("pytest/live_test.py");
     let mut handle = Command::new("python3")
-        .current_dir(pytest_dir!())
-        .args(["live_test.py", "--file", "test_integrations.py"])
+        .current_dir(cargo_manifest_dir)
+        .args([
+            live_test.to_string_lossy().as_ref(),
+            "--file",
+            "test_integrations.py",
+        ])
         .spawn()?;
     let status = handle.wait()?;
     assert!(status.success());