1 files changed, 42 insertions, 0 deletions
diff --git a/spec/ruby/core/hash/lt_spec.rb b/spec/ruby/core/hash/lt_spec.rb
new file mode 100644
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+++ b/spec/ruby/core/hash/lt_spec.rb
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+require_relative '../../spec_helper'
+require_relative 'shared/comparison'
+require_relative 'shared/less_than'
+
+describe "Hash#<" do
+  it_behaves_like :hash_comparison, :<
+  it_behaves_like :hash_less_than, :<
+
+  it "returns false if both hashes are identical" do
+    h = { a: 1, b: 2 }
+    (h < h).should == false
+  end
+end
+
+describe "Hash#<" do
+  before :each do
+    @hash = {a:1, b:2}
+    @bigger = {a:1, b:2, c:3}
+    @unrelated = {c:3, d:4}
+    @similar = {a:2, b:3}
+  end
+
+  it "returns false when receiver size is larger than argument" do
+    (@bigger < @hash).should == false
+    (@bigger < @unrelated).should == false
+  end
+
+  it "returns false when receiver size is the same as argument" do
+    (@hash < @hash).should == false
+    (@hash < @unrelated).should == false
+    (@unrelated < @hash).should == false
+  end
+
+  it "returns true when receiver is a subset of argument" do
+    (@hash < @bigger).should == true
+  end
+
+  it "returns false when keys match but values don't" do
+    (@hash < @similar).should == false
+    (@similar < @hash).should == false
+  end
+end