[Merged by Bors] - Migrate tests to new test API

[jedel1043]

This PR migrates our entire test suite to our new testing API.

It changes the following:

• Migrates tests to new test API.
• Cleans up the API to be a bit more descriptive and maintainable.
• Prettifies our test failure display to show the failed scripts.
• Splits our massive tests.rs file into smaller sub-suites.

Example output of a failing test:

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	94,181	94,181	0
Passed	71,950	71,950	0
Ignored	17,218	17,218	0
Failed	5,013	5,013	0
Panics	12	12	0
Conformance	76.40%	76.40%	0.00%

[codecov]

Codecov Report

Merging #2619 (e909f81) into main (423c16a) will increase coverage by 0.17%.
The diff coverage is 75.94%.

@@            Coverage Diff             @@
##             main    #2619      +/-   ##
==========================================
+ Coverage   49.39%   49.56%   +0.17%     
==========================================
  Files         387      388       +1     
  Lines       39278    39275       -3     
==========================================
+ Hits        19400    19468      +68     
+ Misses      19878    19807      -71     

Impacted Files	Coverage Δ
boa_engine/src/builtins/weak/weak_ref.rs	71.79% <ø> (ø)
boa_engine/src/context/mod.rs	44.13% <ø> (ø)
boa_engine/src/value/serde_json.rs	74.19% <ø> (ø)
boa_parser/src/lexer/error.rs	58.33% <50.00%> (ø)
boa_engine/src/error.rs	33.33% <66.66%> (-3.71%)	⬇️
boa_engine/src/lib.rs	78.20% <76.38%> (-21.80%)	⬇️
boa_engine/src/builtins/bigint/mod.rs	85.18% <100.00%> (ø)
boa_parser/src/error.rs	53.03% <100.00%> (ø)
boa_engine/src/value/display.rs	66.41% <0.00%> (-20.15%)	⬇️
boa_parser/src/parser/cursor/buffered_lexer/mod.rs	87.01% <0.00%> (-7.80%)	⬇️
... and 41 more

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[jasonwilliams]

What's the reason for using Cow here instead of just the static string? Are these test strings ever being mutated?

[jedel1043]

There are some tests that programmatically generate the tested scripts:

boa/boa_engine/src/tests/mod.rs

Lines 429 to 431 in 6c0482e

	run_test(cases.into_iter().map(|(case, msg)| {
	TestAction::assert_native_error(format!("'use strict'; {case}"), ErrorKind::Syntax, msg)
	}));

The other option was to take a String instead of a &'static str, but that would make almost all tests slower, so I opted for taking a Cow instead.

[jasonwilliams]

Most of these tests are only passing 1 item in the array, do we want an API which can handle just a single test?
The name run_test doens't sound right when it's designed to take in an array of tests. But I understand this is just bikeshedding.

[jedel1043]

run_test_actions maybe? Or could be even run_actions, I think.

[jasonwilliams]

I think that name would be describing better what is happening yeah. (Even though it is longer)

[jedel1043]

Most of these tests are only passing 1 item in the array, do we want an API which can handle just a single test?

Thought about it, but I didn't think it would be worth increasing the complexity of the API just to save two ([ and ]) keystrokes...

... but now that I think about it, we could implement IntoIterator for TestAction, which doesn't increase our API complexity, though it makes run_test_actions(TestAction::exec(..)) look a bit weird.

[jasonwilliams]

Looks good so far, but improvement to what we had before!

[HalidOdat]

The tests look much cleaner now! Great work @jedel1043

[raskad]

Nice improvement!

[jedel1043]

Gonna merge this since I've already resolved Jason's comments, and It'll be better to merge this ASAP to avoid merge conflicts.

[jedel1043]

bors r+

[bors]

Pull request successfully merged into main.

Build succeeded:

• Build and Test (macos-latest)
• Build and Test (windows-latest)
• Coverage
• Misc