Power Assert for Ruby

Power Assert for Ruby. 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.

License	2-clause BSDL Ruby's
Categories	Ruby Languages
GroupId	rubygems
ArtifactId	power_assert
Last Version	0.2.3
Release Date	Mar 28, 2015
Type	gem
Description	Power Assert for Ruby Power Assert for Ruby. 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.
Project URL	https://github.com/k-tsj/power_assert
Source Code Management	https://github.com/k-tsj/power_assert

Download power_assert

Filename	Size
power_assert-0.2.3.pom
power_assert-0.2.3.gem	12 KB

Dependencies

test (3)

Group / Artifact	Type	Version
rubygems : test-unit	gem	[0,)
rubygems : rake	gem	[0,)
rubygems » simplecov	gem	[0,)

Project Modules

There are no modules declared in this project.

power_assert¶ ↑

About¶ ↑

Power Assert for Ruby.

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.

• test-unit(>= 3.0.0)

  • Document

• minitest-power_assert

• rspec-power_assert

• pry-power_assert

• pry-byebug-power_assert

• power_p

Requirement¶ ↑

• CRuby 2.0.0 or later

Reference¶ ↑

• Power Assert in Ruby (at RubyKaigi 2014) // Speaker Deck

Known Limitations¶ ↑

• Expressions must be put in one line. Expressions with folded long lines produce nothing report, e.g.:

  assert do
    # reported
    func(foo: 0123456789, bar: "abcdefg")
  end
  
  assert do
    # won't be reported
    func(foo: 0123456789,
         bar: "abcdefg")
  end

• Expressions must have one or more method call. Expressions with no method call produce nothing report, e.g.:

  val = false
  assert do
    # reported
    val == true
  end
  
  assert do
    # won't be reported
    val
  end
  

• Returned values from accessor methods, method missing, or “super” produce nothing report, e.g:

  class Foo
    attr_accessor :val
  end
  foo = Foo.new
  foo.val = false
  
  assert do
    # reported (only the value of "foo" and the literal "true")
    foo.val == true
  end
  
  assert do
    # won't be reported
    foo.val
  end
  

• Expressions should not have conditional branches. Expressions with such conditional codes may produce nothing report, e.g.:

  condition = true
  expected = false
  actual = true
  assert do
    # this will fail but nothing reported
    condition ? expected == actual : expected == actual
  end
  

Travis Build Status ¶ ↑

Versions

Version
0.2.3 Mar 28, 2015