1 files changed, 88 insertions, 0 deletions
diff --git a/spec/ruby/core/range/min_spec.rb b/spec/ruby/core/range/min_spec.rb
new file mode 100644
index 0000000000..9c83d3deca
--- /dev/null
+++ b/spec/ruby/core/range/min_spec.rb
@@ -0,0 +1,88 @@
+require_relative '../../spec_helper'
+
+describe "Range#min" do
+  it "returns the minimum value in the range when called with no arguments" do
+    (1..10).min.should == 1
+    ('f'..'l').min.should == 'f'
+  end
+
+  it "returns the minimum value in the Float range when called with no arguments" do
+    (303.20..908.1111).min.should == 303.20
+  end
+
+  it "returns nil when the start point is greater than the endpoint" do
+    (100..10).min.should == nil
+    ('z'..'l').min.should == nil
+  end
+
+  it "returns nil when the endpoint equals the start point and the range is exclusive" do
+    (7...7).min.should == nil
+  end
+
+  it "returns the start point when the endpoint equals the start point and the range is inclusive" do
+    (7..7).min.should.equal?(7)
+  end
+
+  it "returns nil when the start point is greater than the endpoint in a Float range" do
+    (3003.20..908.1111).min.should == nil
+  end
+
+  it "returns start point when the range is Time..Time(included end point)" do
+    time_start = Time.now
+    time_end = Time.now + 1.0
+    (time_start..time_end).min.should.equal?(time_start)
+  end
+
+  it "returns start point when the range is Time...Time(excluded end point)" do
+    time_start = Time.now
+    time_end = Time.now + 1.0
+    (time_start...time_end).min.should.equal?(time_start)
+  end
+
+  it "returns the start point for endless ranges" do
+    eval("(1..)").min.should == 1
+    eval("(1.0...)").min.should == 1.0
+  end
+
+  it "raises RangeError when called on an beginless range" do
+    -> { (..1).min }.should.raise(RangeError)
+  end
+end
+
+describe "Range#min given a block" do
+  it "passes each pair of values in the range to the block" do
+    acc = []
+    (1..10).min {|a,b| acc << [a,b]; a }
+    acc.flatten!
+    (1..10).each do |value|
+      acc.include?(value).should == true
+    end
+  end
+
+  it "passes each pair of elements to the block where the first argument is the current element, and the last is the first element" do
+    acc = []
+    (1..5).min {|a,b| acc << [a,b]; a }
+    acc.should == [[2, 1], [3, 1], [4, 1], [5, 1]]
+  end
+
+  it "calls #> and #< on the return value of the block" do
+    obj = mock('obj')
+    obj.should_receive(:>).exactly(2).times
+    obj.should_receive(:<).exactly(2).times
+    (1..3).min {|a,b| obj }
+  end
+
+  it "returns the element the block determines to be the minimum" do
+    (1..3).min {|a,b| -3 }.should == 3
+  end
+
+  it "returns nil when the start point is greater than the endpoint" do
+    (100..10).min {|x,y| x <=> y}.should == nil
+    ('z'..'l').min {|x,y| x <=> y}.should == nil
+    (7...7).min {|x,y| x <=> y}.should == nil
+  end
+
+  it "raises RangeError when called with custom comparison method on an endless range" do
+    -> { eval("(1..)").min {|a, b| a} }.should.raise(RangeError)
+  end
+end