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https://github.com/ruby/power_assert

Power Assert for Ruby
https://github.com/ruby/power_assert

Keywords from Contributors

rubygems activerecord activejob mvc repl rspec feature-flag ruby-gem rack documentation-tool

Last synced: about 13 hours ago
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Repository metadata

Power Assert for Ruby

README.md

power_assert

About

Power Assert shows each value of variables and method calls in the expression.
It is useful for testing, providing which value wasn't correct when the condition is not satisfied.

Failure:
   assert { 3.times.to_a.include?(3) }
              |     |    |
              |     |    false
              |     [0, 1, 2]
              #<Enumerator: 3:times>

Related Projects

In general, you don't need to use this library directly.
Use following test frameworks or extensions instead.

Requirement

  • CRuby 3.1+

Configuration

To colorize output messages, add require "power_assert/colorize" to your code.
(It requires irb 1.3.1+)

Known Limitations

  • Expressions must be on a single line. Splitting an assertion across multiple lines prevents any report from being generated, e.g.:
assert do
  # Reported
  func(foo: 0123456789, bar: "abcdefg")
end

assert do
  # Not reported
  func(foo: 0123456789,
       bar: "abcdefg")
end
  • Expressions must include at least one method call. Assertions without method calls generate no report, e.g.:
val = false
assert do
  # Reported
  val == true
end

assert do
  # Not reported
  val
end
  • Return values from method_missing or super generate no report, e.g.:
class Foo
  def method_missing(*)
    :foo
  end
end
foo = Foo.new

assert do
  # Not reported
  foo.foo
end
  • Avoid conditional branches inside assertions. Conditional logic may prevent a report from being generated, e.g.:
condition = true
expected = false
actual = true
assert do
  # This fails, but nothing is reported
  condition ? expected == actual : expected == actual
end
  • (CRuby 4.0+) <Struct subclass>.new generates no report. Use <Struct subclass>.[] instead, e.g.:
s = Struct.new(:a)
assert do
  # Not reported
  s.new(0)
end

assert do
  # Reported
  s[0]
end

Reference


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Last synced: 1 day ago

Total Commits: 391
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Avg Commits per committer: 23.0
Development Distribution Score (DDS): 0.095

Commits in past year: 12
Committers in past year: 4
Avg Commits per committer in past year: 3.0
Development Distribution Score (DDS) in past year: 0.5

Name Email Commits
Kazuki Tsujimoto k****i@c****t 354
Hiroshi SHIBATA h****t@r****g 9
dependabot[bot] 4****] 4
joker1007 k****t@g****m 4
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yui-knk s****a@g****m 3
Kevin Newton k****n@g****m 2
Peter Goldstein p****n@g****m 2
sonots s****s@g****m 2
Jean Boussier j****r@g****m 1
Jeremy Evans c****e@j****t 1
Jun Aruga j****a@r****m 1
Kenichi Kamiya k****1@g****m 1
Shun MIZUKAMI n****4@g****m 1
Sutou Kouhei k****u@c****m 1
YUKI "Piro" Hiroshi p****x@g****m 1
Yoshiyuki Kinjo y****n@g****m 1

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Last synced: 7 days ago

Total issues: 25
Total pull requests: 48
Average time to close issues: 28 days
Average time to close pull requests: 5 days
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Total pull request authors: 22
Average comments per issue: 2.16
Average comments per pull request: 1.1
Merged pull request: 35
Bot issues: 0
Bot pull requests: 3

Past year issues: 0
Past year pull requests: 10
Past year average time to close issues: N/A
Past year average time to close pull requests: 25 days
Past year issue authors: 0
Past year pull request authors: 6
Past year average comments per issue: 0
Past year average comments per pull request: 1.3
Past year merged pull request: 3
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Past year bot pull requests: 2

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Package metadata

gem.coop: power_assert

Power Assert shows each value of variables and method calls in the expression. It is useful for testing, providing which value wasn't correct when the condition is not satisfied.

  • Homepage: https://github.com/ruby/power_assert
  • Documentation: http://www.rubydoc.info/gems/power_assert/
  • Licenses: BSD-2-Clause,Ruby
  • Latest release: 3.0.1 (published 7 months ago)
  • Last Synced: 2026-05-23T07:01:43.948Z (1 day ago)
  • Versions: 38
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Downloads: 79,282,881 Total
  • Docker Downloads: 4,792,429,875
  • Rankings:
    • Dependent repos count: 0.0%
    • Dependent packages count: 0.0%
    • Docker downloads count: 0.002%
    • Average: 0.099%
    • Downloads: 0.394%
  • Maintainers (2)
rubygems.org: power_assert

Power Assert shows each value of variables and method calls in the expression. It is useful for testing, providing which value wasn't correct when the condition is not satisfied.

  • Homepage: https://github.com/ruby/power_assert
  • Documentation: http://www.rubydoc.info/gems/power_assert/
  • Licenses: BSD-2-Clause,Ruby
  • Latest release: 3.0.1 (published 7 months ago)
  • Last Synced: 2026-05-23T16:31:07.140Z (1 day ago)
  • Versions: 38
  • Dependent Packages: 21
  • Dependent Repositories: 17,456
  • Downloads: 79,292,682 Total
  • Docker Downloads: 4,792,429,875
  • Rankings:
    • Docker downloads count: 0.004%
    • Dependent repos count: 0.27%
    • Downloads: 0.406%
    • Dependent packages count: 1.022%
    • Average: 1.87%
    • Stargazers count: 4.125%
    • Forks count: 5.39%
  • Maintainers (2)
proxy.golang.org: github.com/ruby/power_assert

  • Homepage:
  • Documentation: https://pkg.go.dev/github.com/ruby/power_assert#section-documentation
  • Licenses: other
  • Latest release: v3.0.1+incompatible (published 7 months ago)
  • Last Synced: 2026-05-22T04:02:22.371Z (3 days ago)
  • Versions: 38
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Stargazers count: 3.652%
    • Forks count: 4.693%
    • Average: 7.181%
    • Dependent packages count: 9.576%
    • Dependent repos count: 10.802%
alpine-v3.15: ruby-power_assert

Debug tool for Ruby that displays intermediate results of a method chain

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 1.2.0-r0 (published over 4 years ago)
  • Last Synced: 2026-04-01T13:25:15.409Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 4
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    • Dependent packages count: 6.546%
    • Average: 8.115%
    • Stargazers count: 11.301%
    • Forks count: 14.612%
  • Maintainers (1)
alpine-v3.18: ruby-power_assert

Debug tool for Ruby that displays intermediate results of a method chain

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.3-r0 (published about 3 years ago)
  • Last Synced: 2026-04-09T02:09:00.914Z (about 2 months ago)
  • Versions: 1
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    • Average: 9.426%
    • Stargazers count: 16.453%
    • Forks count: 21.251%
  • Maintainers (1)
alpine-v3.18: ruby-power_assert-doc

Debug tool for Ruby that displays intermediate results of a method chain (ri docs)

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.3-r0 (published about 3 years ago)
  • Last Synced: 2026-04-09T02:09:30.331Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
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  • Rankings:
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    • Average: 9.426%
    • Stargazers count: 16.453%
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  • Maintainers (1)
alpine-v3.16: ruby-power_assert

Debug tool for Ruby that displays intermediate results of a method chain

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.1-r0 (published about 4 years ago)
  • Last Synced: 2026-04-02T15:37:42.061Z (about 2 months ago)
  • Versions: 1
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  • Rankings:
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    • Dependent packages count: 12.044%
    • Stargazers count: 12.338%
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  • Maintainers (1)
alpine-v3.17: ruby-power_assert

Debug tool for Ruby that displays intermediate results of a method chain

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.2-r0 (published over 3 years ago)
  • Last Synced: 2026-04-08T14:08:38.939Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 2
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
    • Average: 11.643%
    • Dependent packages count: 12.748%
    • Stargazers count: 14.926%
    • Forks count: 18.895%
  • Maintainers (1)
alpine-v3.15: ruby-power_assert-doc

Debug tool for Ruby that displays intermediate results of a method chain (ri docs)

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 1.2.0-r0 (published over 4 years ago)
  • Last Synced: 2026-04-01T13:25:35.778Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
    • Stargazers count: 11.301%
    • Average: 12.874%
    • Forks count: 14.612%
    • Dependent packages count: 25.585%
  • Maintainers (1)
alpine-edge: ruby-power_assert-doc

Debug tool for Ruby that displays intermediate results of a method chain (ri docs)

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.5-r0 (published about 1 year ago)
  • Last Synced: 2026-03-12T01:10:58.131Z (2 months ago)
  • Versions: 5
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    • Dependent packages count: 14.641%
    • Stargazers count: 17.697%
    • Forks count: 21.838%
  • Maintainers (1)
alpine-edge: ruby-power_assert

Debug tool for Ruby that displays intermediate results of a method chain

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.5-r0 (published about 1 year ago)
  • Last Synced: 2026-03-12T01:12:18.059Z (2 months ago)
  • Versions: 5
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
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    • Average: 13.544%
    • Dependent packages count: 14.641%
    • Stargazers count: 17.697%
    • Forks count: 21.838%
  • Maintainers (1)
alpine-v3.16: ruby-power_assert-doc

Debug tool for Ruby that displays intermediate results of a method chain (ri docs)

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.1-r0 (published about 4 years ago)
  • Last Synced: 2026-04-02T15:37:47.435Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
    • Stargazers count: 12.338%
    • Average: 13.876%
    • Forks count: 15.854%
    • Dependent packages count: 27.311%
  • Maintainers (1)
alpine-v3.17: ruby-power_assert-doc

Debug tool for Ruby that displays intermediate results of a method chain (ri docs)

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.2-r0 (published over 3 years ago)
  • Last Synced: 2026-04-03T06:26:35.587Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
    • Stargazers count: 14.926%
    • Average: 15.269%
    • Forks count: 18.895%
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  • Maintainers (1)
ubuntu-23.10: ruby-power-assert

  • Homepage: https://github.com/ruby/power_assert
  • Licenses:
  • Latest release: 2.0.3-1 (published 3 months ago)
  • Last Synced: 2026-03-14T03:15:20.211Z (2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
    • Dependent packages count: 0.0%
    • Average: 100%
ubuntu-23.04: ruby-power-assert

  • Homepage: https://github.com/ruby/power_assert
  • Licenses:
  • Latest release: 2.0.3-1 (published 3 months ago)
  • Last Synced: 2026-03-11T15:28:30.230Z (2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
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    • Dependent packages count: 0.0%
    • Average: 100%
debian-12: ruby-power-assert

  • Homepage: https://github.com/ruby/power_assert
  • Documentation: https://packages.debian.org/bookworm/ruby-power-assert
  • Licenses:
  • Latest release: 2.0.3-1 (published 3 months ago)
  • Last Synced: 2026-03-13T04:21:20.065Z (2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
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    • Average: 100%
alpine-v3.19: ruby-power_assert-doc

Debug tool for Ruby that displays intermediate results of a method chain (ri docs)

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.3-r0 (published about 3 years ago)
  • Last Synced: 2026-04-02T15:48:56.331Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
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    • Average: 100%
  • Maintainers (1)
alpine-v3.21: ruby-power_assert-doc

Debug tool for Ruby that displays intermediate results of a method chain (ri docs)

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.4-r0 (published over 1 year ago)
  • Last Synced: 2026-04-03T06:21:55.307Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
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alpine-v3.20: ruby-power_assert

Debug tool for Ruby that displays intermediate results of a method chain

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.3-r1 (published over 2 years ago)
  • Last Synced: 2026-04-08T14:02:19.026Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
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    • Average: 100%
  • Maintainers (1)
debian-13: ruby-power-assert

  • Homepage: https://github.com/ruby/power_assert
  • Documentation: https://packages.debian.org/trixie/ruby-power-assert
  • Licenses:
  • Latest release: 2.0.3-1 (published 3 months ago)
  • Last Synced: 2026-03-14T18:10:59.794Z (2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
    • Dependent packages count: 0.0%
    • Average: 100%
alpine-v3.21: ruby-power_assert

Debug tool for Ruby that displays intermediate results of a method chain

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.4-r0 (published over 1 year ago)
  • Last Synced: 2026-04-03T06:21:57.496Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
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    • Average: 100%
  • Maintainers (1)
ubuntu-24.04: ruby-power-assert

  • Homepage: https://github.com/ruby/power_assert
  • Licenses:
  • Latest release: 2.0.3-1 (published 4 months ago)
  • Last Synced: 2026-03-06T16:02:58.218Z (3 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
alpine-v3.19: ruby-power_assert

Debug tool for Ruby that displays intermediate results of a method chain

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.3-r0 (published about 3 years ago)
  • Last Synced: 2026-04-08T14:06:01.684Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
    • Dependent packages count: 0.0%
    • Average: 100%
  • Maintainers (1)
alpine-v3.22: ruby-power_assert

Debug tool for Ruby that displays intermediate results of a method chain

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.5-r0 (published about 1 year ago)
  • Last Synced: 2026-04-03T06:22:11.115Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
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    • Average: 100%
  • Maintainers (1)
alpine-v3.23: ruby-power_assert

Debug tool for Ruby that displays intermediate results of a method chain

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.5-r0 (published about 1 year ago)
  • Last Synced: 2026-04-09T23:07:19.858Z (about 1 month ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
    • Dependent packages count: 0.0%
    • Average: 100%
  • Maintainers (1)
alpine-v3.23: ruby-power_assert-doc

Debug tool for Ruby that displays intermediate results of a method chain (ri docs)

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.5-r0 (published about 1 year ago)
  • Last Synced: 2026-04-09T23:07:20.005Z (about 1 month ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
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ubuntu-24.10: ruby-power-assert

  • Homepage: https://github.com/ruby/power_assert
  • Licenses:
  • Latest release: 2.0.3-1 (published 3 months ago)
  • Last Synced: 2026-03-09T18:22:21.704Z (3 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
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    • Average: 100%
alpine-v3.20: ruby-power_assert-doc

Debug tool for Ruby that displays intermediate results of a method chain (ri docs)

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.3-r1 (published over 2 years ago)
  • Last Synced: 2026-04-08T14:02:16.568Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
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    • Average: 100%
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alpine-v3.22: ruby-power_assert-doc

Debug tool for Ruby that displays intermediate results of a method chain (ri docs)

  • Homepage: https://github.com/ruby/power_assert
  • Licenses: BSD-2-Clause AND Ruby
  • Latest release: 2.0.5-r0 (published about 1 year ago)
  • Last Synced: 2026-04-03T06:22:09.877Z (about 2 months ago)
  • Versions: 1
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 0.0%
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    • Average: 100%
  • Maintainers (1)

Dependencies

power_assert.gemspec rubygems
  • benchmark-ips >= 0 development
  • bundler >= 0 development
  • byebug >= 0 development
  • irb >= 1.3.1 development
  • rake >= 0 development
  • simplecov >= 0 development
  • test-unit >= 0 development
.github/workflows/ci.yml actions
  • actions/checkout v3 composite
  • ruby/setup-ruby v1 composite
Gemfile rubygems
  • benchmark-ips >= 0 development
  • bundler >= 0 development
  • byebug >= 0 development
  • irb >= 1.3.1 development
  • rake >= 0 development
  • simplecov >= 0 development
  • test-unit >= 0 development

Score: 31.170613945834933