Created
March 20, 2023 13:59
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Show RSpec's unhelpful error output when combining matchers
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require 'rspec' | |
Person = Struct.new(:name, :age) | |
RSpec.describe do | |
subject { Person.new("Bob", 32) } | |
it { is_expected.to have_attributes(name: "Bob", age: 33) } | |
# ^ This failure prints the attributes diff as follows: | |
# 1) is expected to have attributes {:age => 33, :name => "Bob"} | |
# Failure/Error: it { is_expected.to have_attributes(name: "Bob", age: 33) } | |
# | |
# expected #<struct Person name="Bob", age=32> to have attributes {:age => 33, :name => "Bob"} but had attributes {:age => 32, :name => "Bob"} | |
# Diff: | |
# @@ -1 +1 @@ | |
# -:age => 33, | |
# +:age => 32, | |
# | |
# # ./test_have_attributes_and.rb:9:in `block (2 levels) in <top (required)>' | |
it { is_expected.to be_a(Person).and have_attributes(name: "Bob", age: 33) } | |
# ^ This failure prints the whole object rather than the attribute diff | |
# 2) is expected to be a kind of Person and have attributes {:age => 33, :name => "Bob"} | |
# Failure/Error: it { is_expected.to be_a(Person).and have_attributes(name: "Bob", age: 33) } | |
# | |
# expected #<struct Person name="Bob", age=32> to have attributes {:age => 33, :name => "Bob"} but had attributes {:age => 32, :name => "Bob"} | |
# Diff for (have attributes {:age => 33, :name => "Bob"}): | |
# @@ -1,3 +1,2 @@ | |
# -:age => 33, | |
# -:name => "Bob", | |
# +"#<struct Person name=\"Bob\", age=32>" | |
# | |
# # ./test_have_attributes_and.rb:12:in `block (2 levels) in <top (required)>' | |
end |
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