tests: Deduplicate fixture code

lib/src/fixture.rs

@@ -19,6 +19,7 @@ use fn_error_context::context;
 use gvariant::aligned_bytes::TryAsAligned;
 use gvariant::{Marker, Structure};
 use io_lifetimes::AsFd;
+use ocidir::cap_std::fs::{DirBuilder, DirBuilderExt as _};
 use once_cell::sync::Lazy;
 use regex::Regex;
 use std::borrow::Cow;
@@ -28,6 +29,7 @@ use std::ops::Add;
 use std::process::{Command, Stdio};
 use std::rc::Rc;
 use std::sync::Arc;
+use tempfile::TempDir;
 
 const OSTREE_GPG_HOME: &[u8] = include_bytes!("fixtures/ostree-gpg-test-home.tar.gz");
 const TEST_GPG_KEYID_1: &str = "7FCA23D8472CDAFA";
@@ -841,4 +843,23 @@ impl Fixture {
         .context("exporting")?;
         Ok((imgref, digest))
     }
+
+    // Generate a directory with some test contents
+    #[context("Generating temp content")]
+    pub fn generate_test_derived_oci(
+        &self,
+        derived_path: impl AsRef<Utf8Path>,
+        tag: Option<&str>,
+    ) -> Result<()> {
+        let temproot = TempDir::new_in(&self.path)?;
+        let temprootd = Dir::open_ambient_dir(&temproot, cap_std::ambient_authority())?;
+        let mut db = DirBuilder::new();
+        db.mode(0o755);
+        db.recursive(true);
+        temprootd.create_dir_with("usr/bin", &db)?;
+        temprootd.write("usr/bin/newderivedfile", "newderivedfile v0")?;
+        temprootd.write("usr/bin/newderivedfile3", "newderivedfile3 v0")?;
+        crate::integrationtest::generate_derived_oci(derived_path, temproot, tag)?;
+        Ok(())
+    }
 }

lib/src/integrationtest.rs

@@ -33,15 +33,15 @@ pub(crate) fn detectenv() -> Result<&'static str> {
 #[context("Generating derived oci")]
 pub fn generate_derived_oci(
     src: impl AsRef<Utf8Path>,
-    dir: impl AsRef<Utf8Path>,
+    dir: impl AsRef<Path>,
     tag: Option<&str>,
 ) -> Result<()> {
     generate_derived_oci_from_tar(
         src,
         move |w| {
             let dir = dir.as_ref();
             let mut layer_tar = tar::Builder::new(w);
-            layer_tar.append_dir_all("./", dir.as_std_path())?;
+            layer_tar.append_dir_all("./", dir)?;
             layer_tar.finish()?;
             Ok(())
         },

lib/tests/it/main.rs

@@ -644,20 +644,7 @@ async fn test_export_as_container_derived() -> Result<()> {
     let derived_tag = "derived";
     // Build a derived image
     let srcpath = src_imgref.name.as_str();
-    let temproot = &fixture.path.join("temproot");
-    || -> Result<_> {
-        std::fs::create_dir(temproot)?;
-        let temprootd = Dir::open_ambient_dir(temproot, cap_std::ambient_authority())?;
-        let mut db = DirBuilder::new();
-        db.mode(0o755);
-        db.recursive(true);
-        temprootd.create_dir_with("usr/bin", &db)?;
-        temprootd.write("usr/bin/newderivedfile", "newderivedfile v0")?;
-        temprootd.write("usr/bin/newderivedfile3", "newderivedfile3 v0")?;
-        Ok(())
-    }()
-    .context("generating temp content")?;
-    ostree_ext::integrationtest::generate_derived_oci(srcpath, temproot, Some(derived_tag))?;
+    fixture.generate_test_derived_oci(srcpath, Some(&derived_tag))?;
     let derived_imgref = ImageReference {
         transport: src_imgref.transport.clone(),
         name: format!("{}:{derived_tag}", src_imgref.name.as_str()),
@@ -917,21 +904,8 @@ r usr/bin/bash bash-v0
 
     // Build a derived image
     let srcpath = imgref.imgref.name.as_str();
-    let temproot = &fixture.path.join("temproot");
-    || -> Result<_> {
-        std::fs::create_dir(temproot)?;
-        let temprootd = Dir::open_ambient_dir(temproot, cap_std::ambient_authority())?;
-        let mut db = DirBuilder::new();
-        db.mode(0o755);
-        db.recursive(true);
-        temprootd.create_dir_with("usr/bin", &db)?;
-        temprootd.write("usr/bin/newderivedfile", "newderivedfile v0")?;
-        temprootd.write("usr/bin/newderivedfile3", "newderivedfile3 v0")?;
-        Ok(())
-    }()
-    .context("generating temp content")?;
     let derived_tag = "derived";
-    ostree_ext::integrationtest::generate_derived_oci(srcpath, temproot, Some(derived_tag))?;
+    fixture.generate_test_derived_oci(srcpath, Some(&derived_tag))?;
 
     let derived_imgref = OstreeImageReference {
         sigverify: SignatureSource::ContainerPolicyAllowInsecure,