init v.1.0.0

Co-authored-by: Copilot <copilot@github.com>

crates/adapters/assets/tests/common/mod.rs

@@ -0,0 +1,41 @@
+#![allow(dead_code)]
+
+use std::{
+    fs,
+    path::{Path, PathBuf},
+};
+
+pub const LOGO_BYTES: &[u8] = b"pretend png";
+
+pub fn path(value: &str) -> Option<PathBuf> {
+    Some(PathBuf::from(value))
+}
+
+pub fn env_of(pairs: &[(&str, &str)]) -> impl Fn(&str) -> Option<PathBuf> + use<> {
+    let pairs: Vec<(String, PathBuf)> = pairs
+        .iter()
+        .map(|(key, value)| ((*key).to_owned(), PathBuf::from(value)))
+        .collect();
+
+    move |key| {
+        pairs
+            .iter()
+            .find(|(name, _)| name == key)
+            .map(|(_, value)| value.clone())
+    }
+}
+
+pub fn scratch(name: &str) -> PathBuf {
+    let directory = std::env::temp_dir().join(format!("dvd-thing-test-{name}"));
+
+    let _ = fs::remove_dir_all(&directory);
+    fs::create_dir_all(&directory).expect("temp directory must be creatable");
+
+    directory
+}
+
+pub fn write_logo(directory: &Path) -> PathBuf {
+    let file = directory.join("logo.png");
+    fs::write(&file, LOGO_BYTES).expect("temp file must be writable");
+    file
+}