[GH-7502] Add Minitest support

[Stelios Frantzeskakis (steliosfran)]

What changed and why

Checklist

• Tests are added or updated for the changes
• YARD docs are added or updated for the changes
• bundle exec rake passes locally (runs both the RSpec and Minitest suites)

Summary

Adds first-class Minitest support, so Rubyzen lint rules can be written with either RSpec or Minitest. Both frameworks share the same engine and behave identically (including allowlist: / baseline: and the rich failure messages).

Closes #29.

What's new

• Minitest adapter — require 'rubyzen/minitest' adds assert_zen_empty, assert_zen_true, and assert_zen_false, the equivalent of the zen_empty / zen_true / zen_false matchers.
• Framework-agnostic entry points:
  • require 'rubyzen' — core Rubyzen APIs (no test framework)
  • require 'rubyzen/rspec' — core + RSpec matchers
  • require 'rubyzen/minitest' — core + Minitest assertions
• rspec is now a development dependency, not a runtime one, so that Minitest users won't have to depend on RSpec.
• Docs, agent skills, and CI updated to cover both frameworks
• Version bumped to 0.2.0 (see CHANGELOG.md).

⚠️ Breaking change

RSpec users will need to replace require 'rubyzen' with require 'rubyzen/rspec':

- require 'rubyzen'
+ require 'rubyzen/rspec'

Individual spec files remain unchanged.

[Copilot]

Pull request overview

This PR adds first-class Minitest support to Rubyzen by splitting the framework-agnostic core from framework-specific adapters, and by introducing Minitest assertion equivalents to the existing RSpec matchers. It also updates docs, sample project lint rules, CI, and packaging to reflect the new dual-framework support and the breaking require-path change for RSpec users.

Changes:

• Introduces rubyzen/core + two adapters: rubyzen/rspec (matchers) and rubyzen/minitest (assertions).
• Adds Minitest assertions (assert_zen_empty, assert_zen_true, assert_zen_false) backed by shared ExpectationHelpers.
• Updates gemspec/deps, docs, sample project, and CI to run both RSpec and Minitest suites.

Reviewed changes

Copilot reviewed 45 out of 45 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/test_helper.rb	Adds Minitest test helper + ParseHelper for the new test suite.
test/minitest_adapter_test.rb	Verifies require 'rubyzen/minitest' contract and assertions availability.
test/assertions/assert_zen_true_test.rb	Minitest coverage for assert_zen_true.
test/assertions/assert_zen_false_test.rb	Minitest coverage for assert_zen_false.
test/assertions/assert_zen_empty_test.rb	Minitest coverage for assert_zen_empty.
spec/spec_helper.rb	Switches RSpec suite to require 'rubyzen/rspec' entry point.
sample_project/test/test_helper.rb	Adds Minitest lint-rule base class (LintTestCase) for sample project.
sample_project/test/repos/repos_test.rb	Minitest version of a sample lint rule.
sample_project/test/models/no_arguments_named_biz_test.rb	Minitest version of a sample lint rule.
sample_project/test/database/do_not_call_active_record_models_outside_repos_test.rb	Minitest version of a sample lint rule (ActiveRecord call detection).
sample_project/test/controllers/no_if_statements_in_controllers_test.rb	Minitest version of a sample lint rule (if statements).
sample_project/spec/spec_helper.rb	Switches sample project RSpec suite to require 'rubyzen/rspec'.
sample_project/spec/modules/module_file_path_consistency_lint_spec.rb	Removes redundant requires; relies on spec_helper.
sample_project/spec/models/no_requires_in_models_lint_spec.rb	Removes redundant requires; relies on spec_helper.
sample_project/spec/constants/no_top_level_constants_lint_spec.rb	Removes redundant requires; relies on spec_helper.
sample_project/spec/attributes/no_public_attr_writer_in_models_lint_spec.rb	Removes redundant requires; relies on spec_helper.
rubyzen-lint.gemspec	Moves rspec to dev dependency; adds minitest/rake dev deps; includes CHANGELOG metadata.
README.md	Documents adapter entry points and adds Minitest usage examples.
Rakefile	Adds default rake task to run both RSpec and Minitest unit suites.
lib/rubyzen/version.rb	Bumps gem version to 0.2.0.
lib/rubyzen/rspec.rb	Adds RSpec adapter entry point and friendly missing-gem error.
lib/rubyzen/providers/blocks_provider.rb	Updates provider doc wording (block forms).
lib/rubyzen/minitest.rb	Adds Minitest adapter entry point and assertion mixin hook.
lib/rubyzen/matchers/zen_true_matcher.rb	Switches matcher helper include to shared ExpectationHelpers.
lib/rubyzen/matchers/zen_false_matcher.rb	Switches matcher helper include to shared ExpectationHelpers.
lib/rubyzen/matchers/zen_empty_matcher.rb	Switches matcher helper include to shared ExpectationHelpers.
lib/rubyzen/matchers/matcher_helpers.rb	Removes matcher-only helper in favor of framework-agnostic helper.
lib/rubyzen/expectation_helpers.rb	Introduces shared engine for failure formatting + allowlist/baseline classification.
lib/rubyzen/core.rb	Introduces framework-agnostic Zeitwerk loader + Rubyzen configuration.
lib/rubyzen/assertions/zen_assertions.rb	Adds Minitest assertion module + requires assertion implementations.
lib/rubyzen/assertions/assert_zen_true.rb	Implements assert_zen_true with allowlist/baseline + rich messages.
lib/rubyzen/assertions/assert_zen_false.rb	Implements assert_zen_false with allowlist/baseline + rich messages.
lib/rubyzen/assertions/assert_zen_empty.rb	Implements assert_zen_empty with allowlist/baseline + rich messages.
lib/rubyzen.rb	Redefines require 'rubyzen' to load core only (no test framework).
CONTRIBUTING.md	Updates contributor guidance for running both test suites and sample lint rules.
CLAUDE.md	Updates architecture docs to include adapters + assertions and updated usage.
CHANGELOG.md	Adds 0.2.0 release notes and migration note.
.github/workflows/tests.yml	Runs both RSpec and Minitest in CI.
.github/PULL_REQUEST_TEMPLATE.md	Updates checklist to bundle exec rake + YARD docs.
.github/ISSUE_TEMPLATE/bug_report.md	Updates environment section to be test-framework-agnostic.
.claude/skills/write-lint-rule/SKILL.md	Updates skill docs/examples to include Minitest adapter usage.
.claude/skills/run-tests/SKILL.md	Updates skill docs for dual-suite testing commands.
.claude/skills/run-lint-rules/SKILL.md	Updates skill docs for running sample lint rules via both frameworks.
.claude/skills/expand-rubyzen/SKILL.md	Updates guidance to mention assertion output and bundle exec rake.
.claude/skills/add-rubyzen-tests/SKILL.md	Updates guidance to include Minitest assertion tests under test/.

[Copilot]

Pull request overview

Copilot reviewed 46 out of 46 changed files in this pull request and generated 2 comments.