1 files changed, 51 insertions, 0 deletions
diff --git a/spec/rubyspec/core/hash/shared/replace.rb b/spec/rubyspec/core/hash/shared/replace.rb
new file mode 100644
index 0000000000..463c861395
--- /dev/null
+++ b/spec/rubyspec/core/hash/shared/replace.rb
@@ -0,0 +1,51 @@
+describe :hash_replace, shared: true do
+  it "replaces the contents of self with other" do
+    h = { a: 1, b: 2 }
+    h.send(@method, c: -1, d: -2).should equal(h)
+    h.should == { c: -1, d: -2 }
+  end
+
+  it "tries to convert the passed argument to a hash using #to_hash" do
+    obj = mock('{1=>2,3=>4}')
+    obj.should_receive(:to_hash).and_return({ 1 => 2, 3 => 4 })
+
+    h = {}
+    h.send(@method, obj)
+    h.should == { 1 => 2, 3 => 4 }
+  end
+
+  it "calls to_hash on hash subclasses" do
+    h = {}
+    h.send(@method, HashSpecs::ToHashHash[1 => 2])
+    h.should == { 1 => 2 }
+  end
+
+  it "does not transfer default values" do
+    hash_a = {}
+    hash_b = Hash.new(5)
+    hash_a.send(@method, hash_b)
+    hash_a.default.should == 5
+
+    hash_a = {}
+    hash_b = Hash.new { |h, k| k * 2 }
+    hash_a.send(@method, hash_b)
+    hash_a.default(5).should == 10
+
+    hash_a = Hash.new { |h, k| k * 5 }
+    hash_b = Hash.new(lambda { raise "Should not invoke lambda" })
+    hash_a.send(@method, hash_b)
+    hash_a.default.should == hash_b.default
+  end
+
+  it "raises a RuntimeError if called on a frozen instance that would not be modified" do
+    lambda do
+      HashSpecs.frozen_hash.send(@method, HashSpecs.frozen_hash)
+    end.should raise_error(RuntimeError)
+  end
+
+  it "raises a RuntimeError if called on a frozen instance that is modified" do
+    lambda do
+      HashSpecs.frozen_hash.send(@method, HashSpecs.empty_frozen_hash)
+    end.should raise_error(RuntimeError)
+  end
+end