Merge pull request #2144 from reitermarkus/spec-readall

Convert `brew readall` test to spec.

Library/Homebrew/test/readall_test.rb → Library/Homebrew/test/cmd/readall_spec.rb

-require "testing_env"
-
-class IntegrationCommandTestReadall < IntegrationCommandTestCase
-  def test_readall
+describe "brew readall", :integration_test do
+  it "imports all Formulae for a given Tap" do
     formula_file = setup_test_formula "testball"
+
     alias_file = CoreTap.new.alias_dir/"foobar"
     alias_file.parent.mkpath
+
     FileUtils.ln_s formula_file, alias_file
-    cmd("readall", "--aliases", "--syntax")
-    cmd("readall", "homebrew/core")
+
+    expect { brew "readall", "--aliases", "--syntax" }
+      .to be_a_success
+      .and not_to_output.to_stdout
+      .and not_to_output.to_stderr
+
+    expect { brew "readall", "homebrew/core" }
+      .to be_a_success
+      .and not_to_output.to_stdout
+      .and not_to_output.to_stderr
   end
 end