chore: Add RSpec integration tests

Signed-off-by: Austin Ziegler <austin@zieglers.ca>

Author: halostatue

.github/workflows/ci.yml

@@ -37,7 +37,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
+      - uses: ruby/setup-ruby@708024e6c902387ab41de36e1669e43b5ee7085e # v1.283.0
         with:
           ruby-version: '3.4'
           rubygems: latest
@@ -71,7 +71,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
+      - uses: ruby/setup-ruby@708024e6c902387ab41de36e1669e43b5ee7085e # v1.283.0
         with:
           ruby-version: '3.4'
           rubygems: latest
@@ -120,7 +120,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
+      - uses: ruby/setup-ruby@708024e6c902387ab41de36e1669e43b5ee7085e # v1.283.0
         with:
           ruby-version: ${{ matrix.ruby }}
           rubygems: latest
@@ -129,6 +129,11 @@ jobs:
 
       - run: bundle exec ruby -S rake test --trace
 
+      - name: Verify RSpec compatibility
+        run: |
+          gem install rspec
+          bundle exec ruby -S rake integration
+
   required-macos:
     name: Ruby ${{ matrix.ruby }} - ${{ matrix.os }}
 
@@ -167,7 +172,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
+      - uses: ruby/setup-ruby@708024e6c902387ab41de36e1669e43b5ee7085e # v1.283.0
         with:
           ruby-version: ${{ matrix.ruby }}
           rubygems: latest
@@ -176,6 +181,11 @@ jobs:
 
       - run: bundle exec ruby -S rake test --trace
 
+      - name: Verify RSpec compatibility
+        run: |
+          gem install rspec
+          bundle exec ruby -S rake integration
+
   optional-windows:
     name: Ruby ${{ matrix.ruby }} - ${{ matrix.os }}
 
@@ -216,7 +226,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
+      - uses: ruby/setup-ruby@708024e6c902387ab41de36e1669e43b5ee7085e # v1.283.0
         with:
           ruby-version: ${{ matrix.ruby }}
           rubygems: latest
@@ -225,6 +235,11 @@ jobs:
 
       - run: bundle exec ruby -S rake test --trace
 
+      - name: Verify RSpec compatibility
+        run: |
+          gem install rspec
+          bundle exec ruby -S rake integration
+
   jruby-optional:
     name: JRuby ${{ matrix.ruby }} - ${{ matrix.os }}
 
@@ -262,7 +277,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
+      - uses: ruby/setup-ruby@708024e6c902387ab41de36e1669e43b5ee7085e # v1.283.0
         with:
           ruby-version: ${{ matrix.ruby }}
           rubygems: latest
@@ -271,6 +286,11 @@ jobs:
 
       - run: bundle exec ruby -S rake test --trace
 
+      - name: Verify RSpec compatibility
+        run: |
+          gem install rspec
+          bundle exec ruby -S rake integration
+
   ruby-head-optional:
     name: Ruby ${{ matrix.ruby }} - ${{ matrix.os }} (optional)
 
@@ -308,11 +328,16 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
+      - uses: ruby/setup-ruby@708024e6c902387ab41de36e1669e43b5ee7085e # v1.283.0
         with:
           ruby-version: ${{ matrix.ruby }}
           rubygems: latest
           bundler: 2
           bundler-cache: true
 
       - run: bundle exec ruby -S rake test --trace
+
+      - name: Verify RSpec compatibility
+        run: |
+          gem install rspec
+          bundle exec ruby -S rake integration

.github/workflows/publish-docs.yml

@@ -38,7 +38,7 @@ jobs:
             'print "version=", Gem::Specification.load(ARGV[0]).rubygems_version, "\n"' \
             diff-lcs.gemspec >>"${GITHUB_OUTPUT}"
 
-      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
+      - uses: ruby/setup-ruby@708024e6c902387ab41de36e1669e43b5ee7085e # v1.283.0
         with:
           bundler-cache: false
           ruby-version: ruby

.github/workflows/publish-gem.yml

@@ -65,7 +65,7 @@ jobs:
             'print "version=", Gem::Specification.load(ARGV[0]).rubygems_version, "\n"' \
             diff-lcs.gemspec >>"${GITHUB_OUTPUT}"
 
-      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
+      - uses: ruby/setup-ruby@708024e6c902387ab41de36e1669e43b5ee7085e # v1.283.0
         with:
           bundler-cache: false
           ruby-version: ruby

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## 2.0.0.beta.1 / 2025-12-31
+## 2.0.0.beta.2 / 2025-01-21
 
 This release has significant **breaking changes**.
 
@@ -43,6 +43,19 @@ This release has significant **breaking changes**.
 
   The order of `VALID_ACTIONS` was changed for the index order to make sense.
 
+- `ldiff` now implements `-` as a filename option for standard input. This is
+  used for integration testing with RSpec like this:
+
+  ```console
+  rspec -Ilib -rdiff/lcs integration/failure/array_diff_spec.rb 2>&1 |
+    ruby -Ilib bin/ldiff -U integration/golden/array_diff.txt -
+  ```
+
+- diff-lcs no longer uses RSpec as its test suite, but instead uses Minitest.
+  The conversion to Minitest and the new RSpec integration tests
+  (`rake integration`) were written with the assistance of [Kiro][kiro] and
+  verified manually, with portions changed as required.
+
 ## 1.6.2 / 2025-05-12
 
 - Handle upcoming changes to the `cgi` gem in Ruby 3.5 ([#147][pull-147])
@@ -68,8 +81,9 @@ This release has significant **breaking changes**.
 
 ## 1.6.0 / 2025-02-13
 
-- Baptiste Courtois (@annih) has done significant work on making `bin/ldiff`
-  work better, contributing a number of issues and pull requests. These include:
+- Baptiste Courtois ([@annih][gh-user-annih]) has done significant work on
+  making `bin/ldiff` work better, contributing a number of issues and pull
+  requests. These include:
 
   - Separation of command parsing from diff-generation in `Diff::LCS::Ldiff`
     code extraction making it easier to use separately from the `bin/ldiff`
@@ -428,8 +442,8 @@ This release has significant **breaking changes**.
 
 ## 1.1.1 / 2004-09-25
 
-- Fixed bug #891 (Set returned from patch command does not contain last equal
-  part).
+- Fixed bug [#891][gh-issue-891] (Set returned from patch command does not
+  contain last equal part).
 
 - Fixed a problem with callback initialisation code (it assumed that all
   callbacks passed as classes can be initialised; now, it rescues NoMethodError
@@ -560,3 +574,6 @@ This release has significant **breaking changes**.
 [standard ruby]: https://github.com/standardrb/standard
 [tidelift]: https://tidelift.com/security
 [tp]: https://guides.rubygems.org/trusted-publishing/
+[kiro]: https://kiro.dev
+[gh-user-annih]: https://github.com/annih
+[gh-issue-891]: https://github.com/halostatue/diff-lcs/issues/891

CONTRIBUTING.md

@@ -13,7 +13,11 @@ diff-lcs is governed under the [Contributor Covenant Code of Conduct][cccoc].
 I have several guidelines to contributing code through pull requests:
 
 - All code changes require tests. In most cases, this will be added or updated
-  unit tests. I use [RSpec][rspec].
+  unit tests. I use [Minitest][minitest].
+
+  - There are integration tests with RSpec which must not be broken, accessible
+    through `rake integration`. This requires a non-bundled RSpec,
+    `gem install rspec`.
 
 - I use code formatters, static analysis tools, and linting to ensure consistent
   styles and formatting. There should be no warning output from test run
@@ -115,6 +119,7 @@ required metadata trailers are:
 [dco]: licences/dco.txt
 [hoe]: https://github.com/seattlerb/hoe
 [issues]: https://github.com/halostatue/diff-lcs/issues
+[minitest]: https://github.com/seattlerb/minitest
 [rspec]: https://rspec.info/documentation/
 [standardrb]: https://github.com/standardrb/standard
 [tpope-qcm]: https://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html

CONTRIBUTORS.md

@@ -1,26 +1,26 @@
 # Contributors
 
-- Austin Ziegler (@halostatue) created diff-lcs.
+- Austin Ziegler ([@halostatue][gh-user-halostatue]) created diff-lcs.
 
 Thanks to everyone else who has contributed to diff-lcs over the years:
 
-- @ginriki
-- @joshbronson
-- @kevinmook
-- @mckaz
+- [@ginriki][gh-user-ginriki]
+- [@joshbronson][gh-user-joshbronson]
+- [@kevinmook][gh-user-kevinmook]
+- [@mckaz][gh-user-mckaz]
 - Akinori Musha
 - Artem Ignatyev
 - Brandon Fish
-- Baptiste Courtois (@annih)
+- Baptiste Courtois ([@annih][gh-user-annih])
 - Camille Drapier
 - Cédric Boutillier
-- @earlopain
+- [@earlopain][gh-user-earlopain]
 - Gregg Kellogg
 - Jagdeep Singh
 - Jason Gladish
 - Jon Rowe
 - Josef Strzibny
-- Josep (@apuratepp)
+- Josep ([@apuratepp][gh-user-apuratepp])
 - Josh Bronson
 - Jun Aruga
 - Justin Steele
@@ -44,6 +44,16 @@ Thanks to everyone else who has contributed to diff-lcs over the years:
 - Ryan Lovelett
 - Scott Steele
 - Simon Courtois
-- Tien (@tiendo1011)
+- Tien ([@tiendo1011][gh-user-tiendo1011])
 - Tomas Jura
 - Vít Ondruch
+
+[gh-user-halostatue]: https://github.com/halostatue
+[gh-user-ginriki]: https://github.com/ginriki
+[gh-user-joshbronson]: https://github.com/joshbronson
+[gh-user-kevinmook]: https://github.com/kevinmook
+[gh-user-mckaz]: https://github.com/mckaz
+[gh-user-annih]: https://github.com/annih
+[gh-user-earlopain]: https://github.com/earlopain
+[gh-user-apuratepp]: https://github.com/apuratepp
+[gh-user-tiendo1011]: https://github.com/tiendo1011

Manifest.txt

@@ -8,6 +8,14 @@ README.md
 Rakefile
 SECURITY.md
 bin/ldiff
+integration/failures/array_diff_spec.rb
+integration/failures/hash_diff_spec.rb
+integration/failures/string_diff_spec.rb
+integration/golden/array_diff.txt
+integration/golden/hash_diff.txt
+integration/golden/string_diff.txt
+integration/rspec_differ_spec.rb
+integration/rspec_expectations_spec.rb
 lib/diff-lcs.rb
 lib/diff/lcs.rb
 lib/diff/lcs/array.rb
@@ -103,6 +111,7 @@ test/fixtures/new-chef
 test/fixtures/new-chef2
 test/fixtures/old-chef
 test/fixtures/old-chef2
+test/test_block.rb
 test/test_change.rb
 test/test_diff.rb
 test/test_helper.rb