Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 37 insertions, 0 deletions

diff --git a/spec/mspec/spec/matchers/have_constant_spec.rb b/spec/mspec/spec/matchers/have_constant_spec.rb
new file mode 100644
index 0000000000..20c5f161d4
--- /dev/null
+++ b/spec/mspec/spec/matchers/have_constant_spec.rb
@@ -0,0 +1,37 @@
+require 'spec_helper'
+require 'mspec/expectations/expectations'
+require 'mspec/matchers'
+
+class HCMSpecs
+  X = :x
+end
+
+describe HaveConstantMatcher do
+  it "matches when mod has the constant" do
+    matcher = HaveConstantMatcher.new :X
+    matcher.matches?(HCMSpecs).should be_true
+  end
+
+  it "does not match when mod does not have the constant" do
+    matcher = HaveConstantMatcher.new :A
+    matcher.matches?(HCMSpecs).should be_false
+  end
+
+  it "provides a failure message for #should" do
+    matcher = HaveConstantMatcher.new :A
+    matcher.matches?(HCMSpecs)
+    matcher.failure_message.should == [
+      "Expected HCMSpecs to have constant 'A'",
+      "but it does not"
+    ]
+  end
+
+  it "provides a failure messoge for #should_not" do
+    matcher = HaveConstantMatcher.new :X
+    matcher.matches?(HCMSpecs)
+    matcher.negative_failure_message.should == [
+      "Expected HCMSpecs NOT to have constant 'X'",
+      "but it does"
+    ]
+  end
+end