Is there a way not to execute an example when another one fails? I want to
minimize failure noises in cases when, say, one spec checks that an array has
an expected number of elements while the others drill down on a specific
element. However, when there's a wrong number of elements in the first place,
other failures are just noise.
Consider the following spec:
1 class Sample
2 attr_reader :items
3 def initialize(number)
4 @items = (1 .. number).map { |_item|
5 Struct.new(:name).new("ITEM:#{_item}")
6 }
7 end
8 end
9
10 describe Sample, "when creating 2 named items" do
11 let(:items) { Sample.new(2).items }
12 subject { items }
13
14 it { should have(2).entries }
15
16 context "first item" do
17 subject { items.first }
18 its(:name) { should == "ITEM:1" }
19 end
20
21 context "last item" do
22 subject { items.last }
23 its(:name) { should == "ITEM:2" }
24 end
25 end
When run, it produces the following:
$ rspec -fd sample_spec.rb
Sample when creating 2 named items
should have 2 entries
first item
name
should == "ITEM:1"
last item
name
should == "ITEM:2"
Finished in 0.00158 seconds
3 examples, 0 failures
Everything is great until I have an "innocent" bug in the range in line 4, like
"(1 ... number)" instead of "(1 .. number)". In which case the above command
will produce this:
$ rspec -fd sample_spec.rb
Sample when creating 2 named items
should have 2 entries (FAILED - 1)
first item
name
should == "ITEM:1"
last item
name
should == "ITEM:2" (FAILED - 2)
Failures:
1) Sample when creating 2 named items
Failure/Error: it { should have(2).entries }
expected 2 entries, got 1
# ./sample_spec.rb:14
2) Sample when creating 2 named items last item name
Failure/Error: its(:name) { should == "ITEM:2" }
expected: "ITEM:2",
got: "ITEM:1" (using ==)
# ./sample_spec.rb:23
Finished in 0.00167 seconds
3 examples, 2 failures
In the above, failure 2) is a direct result of failure 1) and would be great to
avoided if possible. Especially if I want to spec much more stuff there with
much more noise being displayed.
Thank you for your help,
Gennady.
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