Convert brew readall test to spec.

Library/Homebrew/test/cmd/readall_spec.rb

@@ -0,0 +1,20 @@
+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
+
+    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

Library/Homebrew/test/readall_test.rb

@@ -1,12 +0,0 @@
-require "testing_env"
-
-class IntegrationCommandTestReadall < IntegrationCommandTestCase
-  def test_readall
-    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")
-  end
-end