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Project: RSpec Core 2.14

Publisher: RSpec

Backtrace cleaning

To aid in diagnozing spec failures, RSpec cleans matching lines from backtraces. The default patterns cleaned are:

/\/lib\d*\/ruby\//,
/org\/jruby\//,
/bin\//,
/gems/,
/spec\/spec_helper.rb/,
/lib\/rspec\/(core|expectations|matchers|mocks)/

This list can be modified or replaced with the backtrace_clean_patterns option. Additionally, rspec can be run with the --backtrace option to skip backtrace cleaning entirely.

Scenarios
  1. default configuration
  2. With a custom setting for backtrace_clean_patterns
  3. Adding a pattern
  4. Running with the --backtrace option
default configuration
Given
a file named "spec/failing_spec.rb" with: 
describe "2 + 2" do
  it "is 5" do
    (2+2).should eq(5)
  end
end
When
I run rspec
Then
the output should contain "1 example, 1 failure"
And
the output should not contain "lib/rspec/expectations"
With a custom setting for backtrace_clean_patterns
Given
a file named "spec/spec_helper.rb" with: 
RSpec.configure do |config|
  config.backtrace_clean_patterns = [
    /spec_helper/
  ]
end

def foo
  "bar"
end
And
a file named "spec/example_spec.rb" with: 
require 'spec_helper'
describe "foo" do
  it "returns baz" do
    foo.should eq("baz")
  end
end
When
I run rspec
Then
the output should contain "1 example, 1 failure"
And
the output should contain "lib/rspec/expectations"
Adding a pattern
Given
a file named "spec/matchers/be_baz_matcher.rb" with: 
RSpec::Matchers.define :be_baz do |_|
  match do |actual|
    actual == "baz"
  end
end
And
a file named "spec/example_spec.rb" with: 
RSpec.configure do |config|
  config.backtrace_clean_patterns << /be_baz_matcher/
end

describe "bar" do
  it "is baz" do
    "bar".should be_baz
  end
end
When
I run rspec
Then
the output should contain "1 example, 1 failure"
But
the output should not contain "be_baz_matcher"
And
the output should not contain "lib/rspec/expectations"
Running with the --backtrace option
Given
a file named "spec/matchers/be_baz_matcher.rb" with: 
RSpec::Matchers.define :be_baz do |_|
  match do |actual|
    actual == "baz"
  end
end
And
a file named "spec/example_spec.rb" with: 
RSpec.configure do |config|
  config.backtrace_clean_patterns << /be_baz_matcher/
end

describe "bar" do
  it "is baz" do
    "bar".should be_baz
  end
end
When
I run rspec --backtrace
Then
the output should contain "1 example, 1 failure"
And
the output should not contain "be_baz_matcher"

Last published over 6 years ago by myronmarston.