Testunit Skill

Generates Test::Unit tests in Ruby. Classic xUnit-style testing with assert methods and test case classes. Use when user mentions "Test::Unit", "assert_equal Ruby", "Ruby test-unit". Triggers on: "Test::Unit", "Ruby test-unit", "assert_equal Ruby" (not RSpec).

386 stars 76 forksTesting & QAOfficial

Install

skills CLI (Claude Code, Cursor, Codex and more)
npx skills add LambdaTest/agent-skills --skill testunit-skill
Manual install
git clone --depth 1 https://github.com/LambdaTest/agent-skills.git /tmp/agent-skills
mkdir -p ~/.claude/skills
cp -r /tmp/agent-skills/testunit-skill ~/.claude/skills/testunit-skill

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# Test::Unit Ruby Skill

## Core Patterns

### Basic Test

```ruby
require 'test/unit'

class TestCalculator < Test::Unit::TestCase
  def setup
    @calc = Calculator.new
  end

  def test_addition
    assert_equal(5, @calc.add(2, 3), "2 + 3 should equal 5")
  end

  def test_subtraction
    assert_equal(1, @calc.subtract(3, 2))
  end

  def test_division_by_zero
    assert_raise(ZeroDivisionError) { @calc.divide(10, 0) }
  end

  def test_float_division
    assert_in_delta(3.33, @calc.divide(10, 3), 0.01)
  end

  def teardown
    # cleanup
  end
end
```

### Assertions

```ruby
assert_equal(expected, actual, message = nil)
assert_not_equal(unexpected, actual)
assert_true(value)
assert_false(value)
assert_nil(value)
assert_not_nil(value)
assert_instance_of(klass, obj)
assert_kind_of(klass, obj)
assert_respond_to(obj, :method_name)
assert_match(/pattern/, string)
assert_no_match(/pattern/, string)
assert_include(collection, item)
assert_not_include(collection, item)
assert_empty(collection)
assert_not_empty(collection)
assert_raise(ErrorClass) { block }
assert_nothing_raised { block }
assert_in_delta(expected, actual, delta)
assert_operator(value, :>, 5)
assert_send([obj, :method, arg])
assert_block("message") { condition }
```

### Test Fixtures
Read the full skill on GitHub

Details

Skill name
testunit-skill
Repository
LambdaTest/agent-skills
Path
testunit-skill/SKILL.md
License
MIT
Repo updated
30 October 2026
Listed in
VoltAgent/awesome-agent-skills

FAQ

What does the Testunit Skill skill do?

Generates Test::Unit tests in Ruby. Classic xUnit-style testing with assert methods and test case classes. Use when user mentions "Test::Unit", "assert_equal Ruby", "Ruby test-unit". Triggers on: "Test::Unit", "Ruby test-unit", "assert_equal Ruby" (not RSpec).

How do I install the Testunit Skill skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add LambdaTest/agent-skills --skill testunit-skill. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Testunit Skill popular?

It lives in LambdaTest/agent-skills, which has 386 GitHub stars and 76 forks, and is included in 1 curated skill list.

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