expect_snapshot

Compares the printed form of value with its stored snapshot. Strings are compared as they are; any other value is printed with one member or element to a line, so a change shows as a line diff. A test that takes several snapshots numbers them, or names them with name.

Point :: struct { x, y: s32; }

prints_a_point :: (t: *Test) {
    expect_snapshot(t, Point.{ 1, 2 });
    expect_snapshot(t, "a block of text\nwith two lines", "text");
} @test

• t: the running test.
• value: what to snapshot.
• name: tells snapshots of one test apart; empty numbers them.
• loc: where the check is written, shown when it fails. Leave the default.

expect_snapshot :: (
    t: *Test,
    value: Any,
    name := "",
    loc := #caller_location
) -> bool

Point :: struct { x, y: s32; }

prints_a_point :: (t: *Test) {
    expect_snapshot(t, Point.{ 1, 2 });
    expect_snapshot(t, "a block of text\nwith two lines", "text");
} @test

expect_snapshot :: (
    t: *Test,
    text: string,
    name := "",
    loc := #caller_location
) -> bool