Skip to content

test: add more tests for changes within overlays #928

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
gab8i wants to merge 1 commit into
base: master
Choose a base branch
from
Open

test: add more tests for changes within overlays #928

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
179 changes: 178 additions & 1 deletion nomt/tests/overlay.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -162,7 +162,7 @@ fn overlay_uncommitted_not_on_disk() {
}

#[test]
fn overlay_deletions() {
fn overlay_contains_deletions() {
let test_db = || -> Test {
let mut test = Test::new("overlay_deletions");
// subtree at 0000000_0/1
Expand Down Expand Up @@ -252,3 +252,180 @@ fn overlay_deletions() {

let _overlay_b = test.update().0;
}

#[test]
fn overlay_naked_deletions() {
let base_key = [0; 32];
let k0 = base_key.clone();
let mut k1 = base_key.clone();
k1[2] = 64;
let mut k2 = base_key.clone();
k2[2] = 128;
let mut k3 = base_key.clone();
k3[2] = 192;

let mut k4 = base_key.clone();
k4[2] = 224;
let mut k5 = base_key.clone();
k5[2] = 96;

let val = |i| -> Option<Vec<u8>> { Some(vec![i, i]) };

let test_db = || -> Test {
let mut test = Test::new("overlay_naked_deletions");

// subtree at 00000000_00000000_00/01/10/11 (bytes)
// 000000_000000_0000_00/01/10/11 (pages)
test.write(k0.clone(), val(0));
test.write(k1.clone(), val(1));
test.write(k2.clone(), val(2));
test.write(k3.clone(), val(3));

test.commit();
test
};

// 1. Delete an existing key and reinsert the same key with a different value.
// 2. Insert a new key, delete it, and reinsert it with a different value.
// Force page reconstruction to test the leaf collection.

// 1
let mut test = test_db();

test.write(k1, None);

let overlay_a = test.update().0;

test.start_overlay_session([&overlay_a]);
assert_eq!(test.read(k0.clone()), val(0));
assert_eq!(test.read(k1.clone()), None);
assert_eq!(test.read(k2.clone()), val(2));
assert_eq!(test.read(k3.clone()), val(3));

// This enforces page reconstruction due to witness collection.
let _ = test.update().0;

test.start_overlay_session([&overlay_a]);
test.write(k1, val(4));
let overlay_b = test.update().0;

test.start_overlay_session([&overlay_b, &overlay_a]);
assert_eq!(test.read(k0.clone()), val(0));
assert_eq!(test.read(k1.clone()), val(4));
assert_eq!(test.read(k2.clone()), val(2));
assert_eq!(test.read(k3.clone()), val(3));
let _ = test.update().0;

test.start_overlay_session([&overlay_b, &overlay_a]);
test.write(k1, None);
let overlay_c = test.update().0;

test.start_overlay_session([&overlay_c, &overlay_b, &overlay_a]);
assert_eq!(test.read(k0.clone()), val(0));
assert_eq!(test.read(k1.clone()), None);
assert_eq!(test.read(k2.clone()), val(2));
assert_eq!(test.read(k3.clone()), val(3));
let _ = test.update().0;

// 2
let mut test = test_db();

test.write(k4, val(4));

let overlay_a = test.update().0;

test.start_overlay_session([&overlay_a]);
assert_eq!(test.read(k0.clone()), val(0));
assert_eq!(test.read(k1.clone()), val(1));
assert_eq!(test.read(k2.clone()), val(2));
assert_eq!(test.read(k3.clone()), val(3));
assert_eq!(test.read(k4.clone()), val(4));
let _ = test.update().0;

test.start_overlay_session([&overlay_a]);
test.write(k4, None);
let overlay_b = test.update().0;

test.start_overlay_session([&overlay_b, &overlay_a]);
assert_eq!(test.read(k0.clone()), val(0));
assert_eq!(test.read(k1.clone()), val(1));
assert_eq!(test.read(k2.clone()), val(2));
assert_eq!(test.read(k3.clone()), val(3));
assert_eq!(test.read(k4.clone()), None);
let _ = test.update().0;

test.start_overlay_session([&overlay_b, &overlay_a]);
test.write(k4, val(5));
let overlay_c = test.update().0;

test.start_overlay_session([&overlay_c, &overlay_b, &overlay_a]);
assert_eq!(test.read(k0.clone()), val(0));
assert_eq!(test.read(k1.clone()), val(1));
assert_eq!(test.read(k2.clone()), val(2));
assert_eq!(test.read(k3.clone()), val(3));
assert_eq!(test.read(k4.clone()), val(5));
let _ = test.update().0;
}

#[test]
fn overlay_reconstruction_with_multiple_changes() {
let base_key = [0; 32];

let k0 = base_key.clone(); // 000

let mut k1 = base_key.clone(); // 001
k1[2] = 32;

let mut k2 = base_key.clone(); // 010
k2[2] = 64;

let mut k3 = base_key.clone(); // 011
k3[2] = 64 + 32;

let mut k4 = base_key.clone(); // 100
k4[2] = 128;

let mut k5 = base_key.clone(); // 101
k5[2] = 128 + 32;

let mut k6 = base_key.clone(); // 110
k6[2] = 128 + 64;

let mut k7 = base_key.clone(); // 111
k7[2] = 128 + 64 + 32;

let val = |i| -> Option<Vec<u8>> { Some(vec![i, i]) };

let mut test = Test::new("overlay_reconstruction_with_multiple_changes");

test.write(k2.clone(), val(2));
test.write(k3.clone(), val(3));
test.commit();

test.write(k0.clone(), val(0));
test.write(k3.clone(), val(33));
test.write(k5.clone(), val(5));
test.write(k7.clone(), val(7));
let overlay_a = test.update().0;

test.start_overlay_session([&overlay_a]);

test.write(k0.clone(), None);
test.write(k1.clone(), val(1));
test.write(k2.clone(), None);
test.write(k4.clone(), val(4));
test.write(k6.clone(), val(6));
test.write(k7.clone(), None);
let overlay_b = test.update().0;

test.start_overlay_session([&overlay_b, &overlay_a]);
assert_eq!(test.read(k0), None);
assert_eq!(test.read(k1), val(1));
assert_eq!(test.read(k2), None);
assert_eq!(test.read(k3), val(33));
assert_eq!(test.read(k4), val(4));
assert_eq!(test.read(k5), val(5));
assert_eq!(test.read(k6), val(6));
assert_eq!(test.read(k7), None);
let _ = test.update().0;
}
Loading