Add image unpack test for OciImage

Author: ebkalderon

Cargo.lock

@@ -17,3 +17,6 @@ tokio = { version = "0.3", features = ["fs", "macros", "net", "process", "io-uti
 tokio-seqpacket = "0.3"
 uuid = { version = "0.8.1", features = ["v4"] }
 warp = "0.2.5"
+
+[dev-dependencies]
+tokio = { version = "0.3", features = ["full", "test-util"] }

Cargo.toml

@@ -28,6 +28,12 @@ command in your terminal:
 cargo run
 ```
 
+To execute the included unit test suite, run:
+
+```sh
+cargo test
+```
+
 ## Usage
 
 TODO

README.md

@@ -46,6 +46,8 @@ impl OciImage {
             .output()
             .await?;
 
+        println!("{:?}", fetch_cmd);
+
         if !output.status.success() {
             let stderr = String::from_utf8(output.stderr)?;
             return Err(anyhow!(
@@ -152,3 +154,38 @@ impl OciBundle {
         self.base_dir.path()
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const BUSYBOX_OCI_IMAGE: &str = concat!(env!("CARGO_MANIFEST_DIR"), "/tests/busybox");
+
+    #[tokio::test]
+    async fn unpacks_image_correctly() {
+        let bundle = OciBundle::unpack_from(Path::new(BUSYBOX_OCI_IMAGE))
+            .await
+            .expect("failed to unpack bundle");
+
+        assert!(bundle.bundle_dir.exists());
+        assert!(bundle.bundle_dir.is_dir());
+
+        let rootfs_dir = bundle.bundle_dir.join("rootfs");
+        assert!(rootfs_dir.exists());
+        assert!(rootfs_dir.is_dir());
+
+        let config_file = bundle.bundle_dir.join("config.json");
+        assert!(config_file.exists());
+        assert!(config_file.is_file());
+
+        let umoci_file = bundle.bundle_dir.join("umoci.json");
+        assert!(umoci_file.exists());
+        assert!(umoci_file.is_file());
+
+        assert!(bundle.exits_dir.exists());
+        assert!(bundle.exits_dir.is_dir());
+
+        assert!(!bundle.log_file.exists());
+        assert!(!bundle.pid_file.exists());
+    }
+}

src/image.rs

@@ -0,0 +1 @@
+{"created":"2020-11-23T23:23:02.382930462Z","architecture":"amd64","os":"linux","config":{"Env":["PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":["sh"]},"rootfs":{"type":"layers","diff_ids":["sha256:8f8e3c7011ee77277dc15d094222824fdc454df7b6828d31bc3bddf07d47ba33"]},"history":[{"created":"2020-11-23T23:23:02.216746559Z","created_by":"/bin/sh -c #(nop) ADD file:7f51bbea8802a227eb7cd4acfe48f02dac69bd9b039e6882d8e706fcdc95173b in / "},{"created":"2020-11-23T23:23:02.382930462Z","created_by":"/bin/sh -c #(nop)  CMD [\"sh\"]","empty_layer":true}]}

tests/busybox/blobs/sha256/19a138f92230d6bf5f5d435d2e527fb29d12f88c9bd4f81b1932269ea9893ad6

@@ -0,0 +1 @@
+{"schemaVersion":2,"config":{"mediaType":"application/vnd.oci.image.config.v1+json","digest":"sha256:19a138f92230d6bf5f5d435d2e527fb29d12f88c9bd4f81b1932269ea9893ad6","size":575},"layers":[{"mediaType":"application/vnd.oci.image.layer.v1.tar+gzip","digest":"sha256:5f5dd3e95e9fd44603cbb8968144999b730545267ce74d9b442f8f7f7827f776","size":764624}]}

tests/busybox/blobs/sha256/5f5dd3e95e9fd44603cbb8968144999b730545267ce74d9b442f8f7f7827f776

@@ -0,0 +1 @@
+{"schemaVersion":2,"manifests":[{"mediaType":"application/vnd.oci.image.manifest.v1+json","digest":"sha256:694de93787c3f1b8e1b61f4a8bd1bb555138e33b14b67a08237c3c3d678654ea","size":347,"annotations":{"org.opencontainers.image.ref.name":"latest"}}]}

tests/busybox/blobs/sha256/694de93787c3f1b8e1b61f4a8bd1bb555138e33b14b67a08237c3c3d678654ea

@@ -0,0 +1 @@
+{"imageLayoutVersion": "1.0.0"}