Add spec

spec/integration/bisect_spec.rb

@@ -35,6 +35,19 @@ def bisect(cli_args, expected_status=nil)
       end
     end
 
+    context "when the spec ordering is consistent" do
+      it 'returns the minimal reproduction command' do
+        output = bisect(%w[
+          --order defined
+          spec/rspec/core/resources/bisect/consistently_ordered_1_specs.rb
+          spec/rspec/core/resources/bisect/consistently_ordered_2_specs.rb
+          spec/rspec/core/resources/bisect/consistently_ordered_3_specs.rb
+          spec/rspec/core/resources/bisect/consistently_ordered_4_specs.rb
+        ])
+        expect(output).to include("Bisect complete!", "rspec ./spec/rspec/core/resources/bisect/consistently_ordered_2_specs.rb[1:1] ./spec/rspec/core/resources/bisect/consistently_ordered_3_specs.rb[1:1]")
+      end
+    end
+
     context "when the bisect command saturates the pipe" do
       # On OSX and Linux a file descriptor limit meant that the bisect process got stuck at a certain limit.
       # This test demonstrates that we can run large bisects above this limit (found to be at time of commit).

spec/rspec/core/resources/bisect/consistently_ordered_1_specs.rb

@@ -0,0 +1,5 @@
+# Deliberately named _specs.rb to avoid being loaded except when specified
+
+RSpec.describe "Order1" do
+  it("passes") { expect(1).to eq 1 }
+end

spec/rspec/core/resources/bisect/consistently_ordered_2_specs.rb

@@ -0,0 +1,9 @@
+# Deliberately named _specs.rb to avoid being loaded except when specified
+
+require "rspec/core/resources/bisect/frieren_quote"
+
+RSpec.describe "Order2" do
+  before { FrierenQuote.change }
+
+  it("passes") { expect(1).to eq 1 }
+end

spec/rspec/core/resources/bisect/consistently_ordered_3_specs.rb

@@ -0,0 +1,7 @@
+# Deliberately named _specs.rb to avoid being loaded except when specified
+
+require "rspec/core/resources/bisect/frieren_quote"
+
+RSpec.describe "Order3" do
+  it("fails order-dependency")  { expect(FrierenQuote.one).to eq "That is what hero Himmel would have done." }
+end

spec/rspec/core/resources/bisect/consistently_ordered_4_specs.rb

@@ -0,0 +1,5 @@
+# Deliberately named _specs.rb to avoid being loaded except when specified
+
+RSpec.describe "Order4" do
+  it("passes") { expect(1).to eq 1 }
+end

spec/rspec/core/resources/bisect/frieren_quote.rb

@@ -0,0 +1,12 @@
+class FrierenQuote
+  class << self
+    def one
+      @@one ||= "That is what hero Himmel would have done."
+    end
+
+    def change
+      @@one = "The greatest enjoyment comes only during the pursuit of magic, you know."
+    end
+  end
+end
+