//! This contains test scenarios that a given [BlobService] needs to pass.
//! We use [rstest] and [rstest_reuse] to provide all services we want to test
//! against, and then apply this template to all test functions.
use rstest::*;
use rstest_reuse::{self, *};
use std::io;
use tokio::io::AsyncReadExt;
use tokio::io::AsyncSeekExt;
use super::BlobService;
use crate::blobservice;
use crate::fixtures::BLOB_A;
use crate::fixtures::BLOB_A_DIGEST;
use crate::fixtures::BLOB_B;
use crate::fixtures::BLOB_B_DIGEST;
mod utils;
use self::utils::make_grpc_blob_service_client;
/// This produces a template, which will be applied to all individual test functions.
/// See https://github.com/la10736/rstest/issues/130#issuecomment-968864832
#[template]
#[rstest]
#[case::grpc(make_grpc_blob_service_client().await)]
#[case::memory(blobservice::from_addr("memory://").await.unwrap())]
#[case::objectstore_memory(blobservice::from_addr("objectstore+memory://").await.unwrap())]
#[case::sled(blobservice::from_addr("sled://").await.unwrap())]
pub fn blob_services(#[case] blob_service: impl BlobService) {}
/// Using [BlobService::has] on a non-existing blob should return false.
#[apply(blob_services)]
#[tokio::test]
async fn has_nonexistent_false(blob_service: impl BlobService) {
assert!(!blob_service
.has(&BLOB_A_DIGEST)
.await
.expect("must not fail"));
}
/// Using [BlobService::chunks] on a non-existing blob should return Ok(None)
#[apply(blob_services)]
#[tokio::test]
async fn chunks_nonexistent_false(blob_service: impl BlobService) {
assert!(blob_service
.chunks(&BLOB_A_DIGEST)
.await
.expect("must be ok")
.is_none());
}
// TODO: do tests with `chunks`
/// Trying to read a non-existing blob should return a None instead of a reader.
#[apply(blob_services)]
#[tokio::test]
async fn not_found_read(blob_service: impl BlobService) {
assert!(blob_service
.open_read(&BLOB_A_DIGEST)
.await
.expect("must not fail")
.is_none())
}
/// Put a blob in the store, check has, get it back.
#[apply(blob_services)]
// #[case::small(&fixtures::BLOB_A, &fixtures::BLOB_A_DIGEST)]
// #[case::big(&fixtures::BLOB_B, &fixtures::BLOB_B_DIGEST)]
#[tokio::test]
async fn put_has_get(blob_service: impl BlobService) {
// TODO: figure out how to instantiate this with BLOB_A and BLOB_B, as two separate cases
for (blob_contents, blob_digest) in &[
(&*BLOB_A, BLOB_A_DIGEST.clone()),
(&*BLOB_B, BLOB_B_DIGEST.clone()),
] {
let mut w = blob_service.open_write().await;
let l = tokio::io::copy(&mut io::Cursor::new(blob_contents), &mut w)
.await
.expect("copy must succeed");
assert_eq!(
blob_contents.len(),
l as usize,
"written bytes must match blob length"
);
let digest = w.close().await.expect("close must succeed");
assert_eq!(*blob_digest, digest, "returned digest must be correct");
assert!(
blob_service.has(blob_digest).await.expect("must not fail"),
"blob service should now have the blob"
);
let mut r = blob_service
.open_read(blob_digest)
.await
.expect("open_read must succeed")
.expect("must be some");
let mut buf: Vec<u8> = Vec::new();
let mut pinned_reader = std::pin::pin!(r);
let l = tokio::io::copy(&mut pinned_reader, &mut buf)
.await
.expect("copy must succeed");
assert_eq!(
blob_contents.len(),
l as usize,
"read bytes must match blob length"
);
assert_eq!(&blob_contents[..], &buf, "read blob contents must match");
}
}
/// Put a blob in the store, and seek inside it a bit.
#[apply(blob_services)]
#[tokio::test]
async fn put_seek(blob_service: impl BlobService) {
let mut w = blob_service.open_write().await;
tokio::io::copy(&mut io::Cursor::new(&BLOB_B.to_vec()), &mut w)
.await
.expect("copy must succeed");
w.close().await.expect("close must succeed");
// open a blob for reading
let mut r = blob_service
.open_read(&BLOB_B_DIGEST)
.await
.expect("open_read must succeed")
.expect("must be some");
let mut pos: u64 = 0;
// read the first 10 bytes, they must match the data in the fixture.
{
let mut buf = [0; 10];
r.read_exact(&mut buf).await.expect("must succeed");
assert_eq!(
&BLOB_B[pos as usize..pos as usize + buf.len()],
buf,
"expected first 10 bytes to match"
);
pos += buf.len() as u64;
}
// seek by 0 bytes, using SeekFrom::Start.
let p = r
.seek(io::SeekFrom::Start(pos))
.await
.expect("must not fail");
assert_eq!(pos, p);
// read the next 10 bytes, they must match the data in the fixture.
{
let mut buf = [0; 10];
r.read_exact(&mut buf).await.expect("must succeed");
assert_eq!(
&BLOB_B[pos as usize..pos as usize + buf.len()],
buf,
"expected data to match"
);
pos += buf.len() as u64;
}
// seek by 5 bytes, using SeekFrom::Start.
let p = r
.seek(io::SeekFrom::Start(pos + 5))
.await
.expect("must not fail");
pos += 5;
assert_eq!(pos, p);
// read the next 10 bytes, they must match the data in the fixture.
{
let mut buf = [0; 10];
r.read_exact(&mut buf).await.expect("must succeed");
assert_eq!(
&BLOB_B[pos as usize..pos as usize + buf.len()],
buf,
"expected data to match"
);
pos += buf.len() as u64;
}
// seek by 12345 bytes, using SeekFrom::
let p = r
.seek(io::SeekFrom::Current(12345))
.await
.expect("must not fail");
pos += 12345;
assert_eq!(pos, p);
// read the next 10 bytes, they must match the data in the fixture.
{
let mut buf = [0; 10];
r.read_exact(&mut buf).await.expect("must succeed");
assert_eq!(
&BLOB_B[pos as usize..pos as usize + buf.len()],
buf,
"expected data to match"
);
#[allow(unused_assignments)]
{
pos += buf.len() as u64;
}
}
// seeking to the end is okay…
let p = r
.seek(io::SeekFrom::Start(BLOB_B.len() as u64))
.await
.expect("must not fail");
pos = BLOB_B.len() as u64;
assert_eq!(pos, p);
{
// but it returns no more data.
let mut buf: Vec<u8> = Vec::new();
r.read_to_end(&mut buf).await.expect("must not fail");
assert!(buf.is_empty(), "expected no more data to be read");
}
// seeking past the end…
// should either be ok, but then return 0 bytes.
// this matches the behaviour or a Cursor<Vec<u8>>.
if let Ok(_pos) = r.seek(io::SeekFrom::Start(BLOB_B.len() as u64 + 1)).await {
let mut buf: Vec<u8> = Vec::new();
r.read_to_end(&mut buf).await.expect("must not fail");
assert!(buf.is_empty(), "expected no more data to be read");
}
// or not be okay.
// TODO: this is only broken for the gRPC version
// We expect seeking backwards or relative to the end to fail.
// r.seek(io::SeekFrom::Current(-1))
// .expect_err("SeekFrom::Current(-1) expected to fail");
// r.seek(io::SeekFrom::Start(pos - 1))
// .expect_err("SeekFrom::Start(pos-1) expected to fail");
// r.seek(io::SeekFrom::End(0))
// .expect_err("SeekFrom::End(_) expected to fail");
}
