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, 56 insertions, 0 deletions

diff --git a/spec/rubyspec/core/env/shared/store.rb b/spec/rubyspec/core/env/shared/store.rb
new file mode 100644
index 0000000000..4949ca8c73
--- /dev/null
+++ b/spec/rubyspec/core/env/shared/store.rb
@@ -0,0 +1,56 @@
+describe :env_store, shared: true do
+  after :each do
+    ENV.delete("foo")
+  end
+
+  it "sets the environment variable to the given value" do
+    ENV.send(@method, "foo", "bar")
+    ENV["foo"].should == "bar"
+  end
+
+  it "returns the value" do
+    value = "bar"
+    ENV.send(@method, "foo", value).should equal(value)
+  end
+
+  it "deletes the environment variable when the value is nil" do
+    ENV["foo"] = "bar"
+    ENV.send(@method, "foo", nil)
+    ENV.key?("foo").should be_false
+  end
+
+  it "coerces the key argument with #to_str" do
+    k = mock("key")
+    k.should_receive(:to_str).and_return("foo")
+    ENV.send(@method, k, "bar")
+    ENV["foo"].should == "bar"
+  end
+
+  it "coerces the value argument with #to_str" do
+    v = mock("value")
+    v.should_receive(:to_str).and_return("bar")
+    ENV.send(@method, "foo", v)
+    ENV["foo"].should == "bar"
+  end
+
+  it "raises TypeError when the key is not coercible to String" do
+    lambda { ENV.send(@method, Object.new, "bar") }.should raise_error(TypeError)
+  end
+
+  it "raises TypeError when the value is not coercible to String" do
+    lambda { ENV.send(@method, "foo", Object.new) }.should raise_error(TypeError)
+  end
+
+  it "raises Errno::EINVAL when the key contains the '=' character" do
+    lambda { ENV.send(@method, "foo=", "bar") }.should raise_error(Errno::EINVAL)
+  end
+
+  it "raises Errno::EINVAL when the key is an empty string" do
+    lambda { ENV.send(@method, "", "bar") }.should raise_error(Errno::EINVAL)
+  end
+
+  it "does nothing when the key is not a valid environment variable key and the value is nil" do
+    ENV.send(@method, "foo=", nil)
+    ENV.key?("foo=").should be_false
+  end
+end