1 files changed, 32 insertions, 0 deletions
diff --git a/spec/ruby/core/env/shared/select.rb b/spec/ruby/core/env/shared/select.rb
new file mode 100644
index 0000000000..a0b46a775a
--- /dev/null
+++ b/spec/ruby/core/env/shared/select.rb
@@ -0,0 +1,32 @@
+describe :env_select, shared: true do
+  it "returns a Hash of names and values for which block return true" do
+    ENV["foo"] = "bar"
+    (ENV.send(@method) { |k, v| k == "foo" }).should == { "foo" => "bar" }
+    ENV.delete "foo"
+  end
+
+  it "returns an Enumerator when no block is given" do
+    ENV.send(@method).should be_an_instance_of(Enumerator)
+  end
+end
+
+describe :env_select!, shared: true do
+  it "removes environment variables for which the block returns true" do
+    ENV["foo"] = "bar"
+    ENV.send(@method) { |k, v| k != "foo" }
+    ENV["foo"].should == nil
+  end
+
+  it "returns self if any changes were made" do
+    ENV["foo"] = "bar"
+    (ENV.send(@method) { |k, v| k != "foo" }).should == ENV
+  end
+
+  it "returns nil if no changes were made" do
+    (ENV.send(@method) { true }).should == nil
+  end
+
+  it "returns an Enumerator if called without a block" do
+    ENV.send(@method).should be_an_instance_of(Enumerator)
+  end
+end