Merge pull request #42 from mgautierfr/tempdir_fixture

Introduce TempDir as std fixture.

Author: mgautierfr

rustest-fixtures/src/lib.rs

@@ -4,7 +4,9 @@
 //! If you have a need for new standard fixture, issue or PR are welcomed.
 
 mod global;
+mod tempdir;
 mod tempfile;
 
 pub use global::Global;
+pub use tempdir::TempDir;
 pub use tempfile::TempFile;

rustest-fixtures/src/tempdir.rs

@@ -0,0 +1,53 @@
+use rustest::{
+    Duplicate, Fixture, FixtureCreationError, FixtureCreationResult, FixtureProxy, FixtureScope,
+    TestContext, TestName,
+};
+
+/// A temporary directory.
+///
+/// A temporary directory, generated with `tempfile` crate.
+pub struct TempDir(tempfile::TempDir);
+
+impl std::ops::Deref for TempDir {
+    type Target = tempfile::TempDir;
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl Fixture for TempDir {
+    type Type = tempfile::TempDir;
+    type Proxy = Proxy;
+}
+
+pub struct Proxy;
+
+impl Duplicate for Proxy {
+    fn duplicate(&self) -> Self {
+        Self
+    }
+}
+
+impl TestName for Proxy {
+    fn name(&self) -> Option<String> {
+        None
+    }
+}
+
+impl FixtureProxy for Proxy {
+    type Fixt = TempDir;
+    const SCOPE: FixtureScope = FixtureScope::Once;
+
+    fn setup(_ctx: &mut TestContext) -> Vec<Self>
+    where
+        Self: Sized,
+    {
+        vec![Self]
+    }
+
+    fn build(self) -> FixtureCreationResult<Self::Fixt> {
+        tempfile::tempdir_in(std::env::temp_dir())
+            .map(TempDir)
+            .map_err(|e| FixtureCreationError::new("TempDir", e))
+    }
+}