1 files changed, 67 insertions, 0 deletions
diff --git a/spec/rubyspec/language/loop_spec.rb b/spec/rubyspec/language/loop_spec.rb
new file mode 100644
index 0000000000..4e60e0d8e6
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+++ b/spec/rubyspec/language/loop_spec.rb
@@ -0,0 +1,67 @@
+require File.expand_path('../../spec_helper', __FILE__)
+
+describe "The loop expression" do
+  it "repeats the given block until a break is called" do
+    outer_loop = 0
+    loop do
+      outer_loop += 1
+      break if outer_loop == 10
+    end
+    outer_loop.should == 10
+  end
+
+  it "executes code in its own scope" do
+    loop do
+      inner_loop = 123
+      break
+    end
+    lambda { inner_loop }.should raise_error(NameError)
+  end
+
+  it "returns the value passed to break if interrupted by break" do
+    loop do
+      break 123
+    end.should == 123
+  end
+
+  it "returns nil if interrupted by break with no arguments" do
+    loop do
+      break
+    end.should == nil
+  end
+
+  it "skips to end of body with next" do
+    a = []
+    i = 0
+    loop do
+      break if (i+=1) >= 5
+      next if i == 3
+      a << i
+    end
+    a.should == [1, 2, 4]
+  end
+
+  it "restarts the current iteration with redo" do
+    a = []
+    loop do
+      a << 1
+      redo if a.size < 2
+      a << 2
+      break if a.size == 3
+    end
+    a.should == [1, 1, 2]
+  end
+
+  it "uses a spaghetti nightmare of redo, next and break" do
+    a = []
+    loop do
+      a << 1
+      redo if a.size == 1
+      a << 2
+      next if a.size == 3
+      a << 3
+      break if a.size > 6
+    end
+    a.should == [1, 1, 2, 1, 2, 3, 1, 2, 3]
+  end
+end