add path_info tests

tests/common/mod.rs

@@ -0,0 +1,16 @@
+use nixcp::store::Store;
+
+pub struct Context {
+    pub store: Store,
+}
+
+impl Context {
+    fn new() -> Self {
+        let store = Store::connect().expect("connect to nix store");
+        Self { store }
+    }
+}
+
+pub fn context() -> Context {
+    Context::new()
+}

tests/path_info.rs

@@ -0,0 +1,46 @@
+use nixcp::path_info::PathInfo;
+use std::path::PathBuf;
+use std::process::Command;
+
+mod common;
+
+const HELLO: &str = "github:nixos/nixpkgs?ref=f771eb401a46846c1aebd20552521b233dd7e18b#hello";
+const HELLO_DRV: &str = "iqbwkm8mjjjlmw6x6ry9rhzin2cp9372-hello-2.12.1.drv";
+
+#[tokio::test]
+async fn path_info_from_package() {
+    let ctx = common::context();
+    let path = PathBuf::from(HELLO);
+    let path_info = PathInfo::from_path(&path, &ctx.store)
+        .await
+        .expect("get pathinfo from package");
+    assert_eq!(path_info.path.to_string(), HELLO_DRV);
+}
+
+#[tokio::test]
+async fn path_info_from_path() {
+    // the path must be in the store
+    Command::new("nix")
+        .arg("build")
+        .arg("--no-link")
+        .arg(HELLO)
+        .status()
+        .unwrap();
+    let ctx = common::context();
+    let path = PathBuf::from("/nix/store/9bwryidal9q3g91cjm6xschfn4ikd82q-hello-2.12.1");
+    let path_info = PathInfo::from_path(&path, &ctx.store)
+        .await
+        .expect("get pathinfo from package");
+    assert_eq!(path_info.path.to_string(), HELLO_DRV);
+}
+
+#[tokio::test]
+async fn closure() {
+    let ctx = common::context();
+    let path = PathBuf::from(HELLO);
+    let path_info = PathInfo::from_path(&path, &ctx.store)
+        .await
+        .expect("get pathinfo from package");
+    let closure = path_info.get_closure(&ctx.store).await.unwrap();
+    assert_eq!(closure.len(), 466);
+}