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egui/Cargo.toml
lucasmerlin 70a01138b7 Add egui testing library (#5166) 
- closes #3491 
- closes #3926

This adds a testing library to egui based on
[kittest](https://github.com/rerun-io/kittest). Kittest is a new
[AccessKit](https://github.com/AccessKit/accesskit/)-based testing
library. The api is inspired by the js
[testing-library](https://testing-library.com/) where the idea is also
to query the dom based on accessibility attributes.
We made kittest with egui in mind but it should work with any rust gui
framework with AccessKit support.

It currently has support for:
- running the egui app, frame by frame
- building the AccessKit tree
- ergonomic queries via kittest
  - via e.g. get_by_name, get_by_role
- simulating events based on the accesskit node id
- creating arbitrary events based on Harness::input_mut
- rendering screenshots via wgpu
- snapshot tests with these screenshots

A simple test looks like this: 
```rust
fn main() {
    let mut checked = false;
    let app = |ctx: &Context| {
        CentralPanel::default().show(ctx, |ui| {
            ui.checkbox(&mut checked, "Check me!");
        });
    };

    let mut harness = Harness::builder().with_size(egui::Vec2::new(200.0, 100.0)).build(app);
    
    let checkbox = harness.get_by_name("Check me!");
    assert_eq!(checkbox.toggled(), Some(Toggled::False));
    checkbox.click();
    
    harness.run();

    let checkbox = harness.get_by_name("Check me!");
    assert_eq!(checkbox.toggled(), Some(Toggled::True));

    // You can even render the ui and do image snapshot tests
    #[cfg(all(feature = "wgpu", feature = "snapshot"))]
    egui_kittest::image_snapshot(&egui_kittest::wgpu::TestRenderer::new().render(&harness), "readme_example");
}
```

~Since getting wgpu to run in ci is a hassle, I'm taking another shot at
creating a software renderer for egui (ideally without a huge dependency
like skia)~ (this didn't work as well as I hoped and it turns out in CI
you can just run tests on a mac runner which comes with a real GPU)
 
Here is a example of a failed snapshot test in ci, it will say which
snapshot failed and upload an artifact with the before / after and diff
images:

https://github.com/emilk/egui/actions/runs/11183049487/job/31090724606?pr=5166
2024-10-22 12:39:00 +02:00

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[workspace]
resolver = "2"
members = [
"crates/ecolor",
"crates/egui_demo_app",
"crates/egui_demo_lib",
"crates/egui_extras",
"crates/egui_glow",
"crates/egui_kittest",
"crates/egui-wgpu",
"crates/egui-winit",
"crates/egui",
"crates/emath",
"crates/epaint",
"crates/epaint_default_fonts",
"examples/*",
"tests/*",
"xtask",
]
[workspace.package]
edition = "2021"
license = "MIT OR Apache-2.0"
rust-version = "1.76"
version = "0.29.1"
[profile.release]
# lto = true # VERY slightly smaller wasm
# opt-level = 's' # 10-20% smaller wasm compared to `opt-level = 3`
# opt-level = 1 # very slow and big wasm. Don't do this.
opt-level = 2 # fast and small wasm, basically same as `opt-level = 's'`
# opt-level = 3 # unnecessarily large wasm for no performance gain
# debug = true # include debug symbols, useful when profiling wasm
panic = "abort" # This leads to better optimizations and smaller binaries (and is the default in Wasm anyways).
[profile.dev]
# Can't leave this on by default, because it breaks the Windows build. Related: https://github.com/rust-lang/cargo/issues/4897
# split-debuginfo = "unpacked" # faster debug builds on mac
# opt-level = 1 # Make debug builds run faster
# panic = "abort" leads to better optimizations and smaller binaries (and is the default in Wasm anyways),
# but it also means backtraces don't work with the `backtrace` library (https://github.com/rust-lang/backtrace-rs/issues/397).
# egui has a feature where if you hold down all modifiers keys on your keyboard and hover any UI widget,
# you will see the backtrace to that widget, and we don't want to break that feature in dev builds.
[profile.dev.package."*"]
# Optimize all dependencies even in debug builds (does not affect workspace packages):
opt-level = 2
[workspace.dependencies]
emath = { version = "0.29.1", path = "crates/emath", default-features = false }
ecolor = { version = "0.29.1", path = "crates/ecolor", default-features = false }
epaint = { version = "0.29.1", path = "crates/epaint", default-features = false }
epaint_default_fonts = { version = "0.29.1", path = "crates/epaint_default_fonts" }
egui = { version = "0.29.1", path = "crates/egui", default-features = false }
egui-winit = { version = "0.29.1", path = "crates/egui-winit", default-features = false }
egui_extras = { version = "0.29.1", path = "crates/egui_extras", default-features = false }
egui-wgpu = { version = "0.29.1", path = "crates/egui-wgpu", default-features = false }
egui_demo_lib = { version = "0.29.1", path = "crates/egui_demo_lib", default-features = false }
egui_glow = { version = "0.29.1", path = "crates/egui_glow", default-features = false }
egui_kittest = { version = "0.29.1", path = "crates/egui_kittest", default-features = false }
eframe = { version = "0.29.1", path = "crates/eframe", default-features = false }
ahash = { version = "0.8.11", default-features = false, features = [
"no-rng", # we don't need DOS-protection, so we let users opt-in to it instead
"std",
] }
backtrace = "0.3"
bytemuck = "1.7.2"
criterion = { version = "0.5.1", default-features = false }
dify = { version = "0.7", default-features = false }
document-features = " 0.2.8"
glow = "0.14"
glutin = "0.32.0"
glutin-winit = "0.5.0"
home = "0.5.9"
image = { version = "0.25", default-features = false }
kittest = { git = "https://github.com/rerun-io/kittest", version = "0.1", branch = "main"}
log = { version = "0.4", features = ["std"] }
nohash-hasher = "0.2"
parking_lot = "0.12"
pollster = "0.3"
puffin = "0.19"
puffin_http = "0.16"
ron = "0.8"
raw-window-handle = "0.6.0"
serde = { version = "1", features = ["derive"] }
thiserror = "1.0.37"
web-time = "1.1.0" # Timekeeping for native and web
wasm-bindgen = "0.2"
wasm-bindgen-futures = "0.4"
web-sys = "0.3.70"
wgpu = { version = "22.1.0", default-features = false }
windows-sys = "0.52"
winit = { version = "0.30.5", default-features = false }
[workspace.lints.rust]
unsafe_code = "deny"
elided_lifetimes_in_paths = "warn"
future_incompatible = "warn"
nonstandard_style = "warn"
rust_2018_idioms = "warn"
rust_2021_prelude_collisions = "warn"
semicolon_in_expressions_from_macros = "warn"
trivial_numeric_casts = "warn"
unsafe_op_in_unsafe_fn = "warn" # `unsafe_op_in_unsafe_fn` may become the default in future Rust versions: https://github.com/rust-lang/rust/issues/71668
unused_extern_crates = "warn"
unused_import_braces = "warn"
unused_lifetimes = "warn"
trivial_casts = "allow"
unused_qualifications = "allow"
[workspace.lints.rustdoc]
all = "warn"
missing_crate_level_docs = "warn"
broken_intra_doc_links = "warn"
# See also clippy.toml
[workspace.lints.clippy]
as_ptr_cast_mut = "warn"
await_holding_lock = "warn"
bool_to_int_with_if = "warn"
char_lit_as_u8 = "warn"
checked_conversions = "warn"
clear_with_drain = "warn"
cloned_instead_of_copied = "warn"
dbg_macro = "warn"
debug_assert_with_mut_call = "warn"
derive_partial_eq_without_eq = "warn"
disallowed_macros = "warn" # See clippy.toml
disallowed_methods = "warn" # See clippy.toml
disallowed_names = "warn" # See clippy.toml
disallowed_script_idents = "warn" # See clippy.toml
disallowed_types = "warn" # See clippy.toml
doc_link_with_quotes = "warn"
doc_markdown = "warn"
empty_enum = "warn"
enum_glob_use = "warn"
equatable_if_let = "warn"
exit = "warn"
expl_impl_clone_on_copy = "warn"
explicit_deref_methods = "warn"
explicit_into_iter_loop = "warn"
explicit_iter_loop = "warn"
fallible_impl_from = "warn"
filter_map_next = "warn"
flat_map_option = "warn"
float_cmp_const = "warn"
fn_params_excessive_bools = "warn"
fn_to_numeric_cast_any = "warn"
from_iter_instead_of_collect = "warn"
get_unwrap = "warn"
if_let_mutex = "warn"
implicit_clone = "warn"
implied_bounds_in_impls = "warn"
imprecise_flops = "warn"
index_refutable_slice = "warn"
inefficient_to_string = "warn"
infinite_loop = "warn"
into_iter_without_iter = "warn"
invalid_upcast_comparisons = "warn"
iter_not_returning_iterator = "warn"
iter_on_empty_collections = "warn"
iter_on_single_items = "warn"
iter_without_into_iter = "warn"
large_digit_groups = "warn"
large_include_file = "warn"
large_stack_arrays = "warn"
large_stack_frames = "warn"
large_types_passed_by_value = "warn"
let_unit_value = "warn"
linkedlist = "warn"
lossy_float_literal = "warn"
macro_use_imports = "warn"
manual_assert = "warn"
manual_clamp = "warn"
manual_instant_elapsed = "warn"
manual_let_else = "warn"
manual_ok_or = "warn"
manual_string_new = "warn"
map_err_ignore = "warn"
map_flatten = "warn"
map_unwrap_or = "warn"
match_bool = "warn"
match_on_vec_items = "warn"
match_same_arms = "warn"
match_wild_err_arm = "warn"
match_wildcard_for_single_variants = "warn"
mem_forget = "warn"
mismatched_target_os = "warn"
mismatching_type_param_order = "warn"
missing_enforced_import_renames = "warn"
missing_errors_doc = "warn"
missing_safety_doc = "warn"
mut_mut = "warn"
mutex_integer = "warn"
needless_borrow = "warn"
needless_continue = "warn"
needless_for_each = "warn"
needless_pass_by_ref_mut = "warn"
needless_pass_by_value = "warn"
negative_feature_names = "warn"
nonstandard_macro_braces = "warn"
option_option = "warn"
path_buf_push_overwrite = "warn"
print_stderr = "warn"
ptr_as_ptr = "warn"
ptr_cast_constness = "warn"
pub_without_shorthand = "warn"
rc_mutex = "warn"
readonly_write_lock = "warn"
redundant_type_annotations = "warn"
ref_option_ref = "warn"
ref_patterns = "warn"
rest_pat_in_fully_bound_structs = "warn"
same_functions_in_if_condition = "warn"
semicolon_if_nothing_returned = "warn"
single_match_else = "warn"
str_to_string = "warn"
string_add = "warn"
string_add_assign = "warn"
string_lit_as_bytes = "warn"
string_lit_chars_any = "warn"
string_to_string = "warn"
suspicious_command_arg_space = "warn"
suspicious_xor_used_as_pow = "warn"
todo = "warn"
trailing_empty_array = "warn"
trait_duplication_in_bounds = "warn"
tuple_array_conversions = "warn"
unchecked_duration_subtraction = "warn"
undocumented_unsafe_blocks = "warn"
unimplemented = "warn"
uninhabited_references = "warn"
uninlined_format_args = "warn"
unnecessary_box_returns = "warn"
unnecessary_safety_doc = "warn"
unnecessary_struct_initialization = "warn"
unnecessary_wraps = "warn"
unnested_or_patterns = "warn"
unused_peekable = "warn"
unused_rounding = "warn"
unused_self = "warn"
use_self = "warn"
useless_transmute = "warn"
verbose_file_reads = "warn"
wildcard_dependencies = "warn"
wildcard_imports = "warn"
zero_sized_map_values = "warn"
# TODO(emilk): enable more of these lints:
iter_over_hash_type = "allow"
let_underscore_untyped = "allow"
missing_assert_message = "allow"
should_panic_without_expect = "allow"
too_many_lines = "allow"
unwrap_used = "allow" # TODO(emilk): We really wanna warn on this one
manual_range_contains = "allow" # this one is just worse imho
self_named_module_files = "allow" # Disabled waiting on https://github.com/rust-lang/rust-clippy/issues/9602
significant_drop_tightening = "allow" # Too many false positives
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