summaryrefslogtreecommitdiff
path: root/spec/ruby/core/enumerator/peek_spec.rb
diff options
context:
space:
mode:
authoreregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2017-09-20 20:18:52 +0000
committereregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2017-09-20 20:18:52 +0000
commit1d15d5f08032acf1b7bceacbb450d617ff6e0931 (patch)
treea3785a79899302bc149e4a6e72f624ac27dc1f10 /spec/ruby/core/enumerator/peek_spec.rb
parent75bfc6440d595bf339007f4fb280fd4d743e89c1 (diff)
Move spec/rubyspec to spec/ruby for consistency
* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'spec/ruby/core/enumerator/peek_spec.rb')
-rw-r--r--spec/ruby/core/enumerator/peek_spec.rb36
1 files changed, 36 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerator/peek_spec.rb b/spec/ruby/core/enumerator/peek_spec.rb
new file mode 100644
index 0000000000..26ac85161b
--- /dev/null
+++ b/spec/ruby/core/enumerator/peek_spec.rb
@@ -0,0 +1,36 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Enumerator#peek" do
+ before :each do
+ @e = (1..5).to_a.to_enum
+ end
+
+ it "returns the next element in self" do
+ @e.peek.should == 1
+ end
+
+ it "does not advance the position of the current element" do
+ @e.next.should == 1
+ @e.peek.should == 2
+ @e.next.should == 2
+ end
+
+ it "can be called repeatedly without advancing the position of the current element" do
+ @e.peek
+ @e.peek
+ @e.peek.should == 1
+ @e.next.should == 1
+ end
+
+ it "works in concert with #rewind" do
+ @e.next
+ @e.next
+ @e.rewind
+ @e.peek.should == 1
+ end
+
+ it "raises StopIteration if called on a finished enumerator" do
+ 5.times { @e.next }
+ lambda { @e.peek }.should raise_error(StopIteration)
+ end
+end