1 files changed, 70 insertions, 0 deletions
diff --git a/spec/ruby/library/objectspace/dump_spec.rb b/spec/ruby/library/objectspace/dump_spec.rb
new file mode 100644
index 0000000000..e22ee3df1e
--- /dev/null
+++ b/spec/ruby/library/objectspace/dump_spec.rb
@@ -0,0 +1,70 @@
+require_relative '../../spec_helper'
+require 'objspace'
+
+describe "ObjectSpace.dump" do
+  it "dumps the content of object as JSON" do
+    require 'json'
+    string = ObjectSpace.dump("abc")
+    dump = JSON.parse(string)
+
+    dump['type'].should == "STRING"
+    dump['value'].should == "abc"
+  end
+
+  it "dumps to string when passed output: :string" do
+    string = ObjectSpace.dump("abc", output: :string)
+    string.should be_kind_of(String)
+    string.should include('"value":"abc"')
+  end
+
+  it "dumps to string when :output not specified" do
+    string = ObjectSpace.dump("abc")
+    string.should be_kind_of(String)
+    string.should include('"value":"abc"')
+  end
+
+  it "dumps to a temporary file when passed output: :file" do
+    file = ObjectSpace.dump("abc", output: :file)
+    file.should be_kind_of(File)
+
+    file.rewind
+    content = file.read
+    content.should include('"value":"abc"')
+  ensure
+    file.close
+    File.unlink file.path
+  end
+
+  it "dumps to a temporary file when passed output: :nil" do
+    file = ObjectSpace.dump("abc", output: nil)
+    file.should be_kind_of(File)
+
+    file.rewind
+    file.read.should include('"value":"abc"')
+  ensure
+    file.close
+    File.unlink file.path
+  end
+
+  it "dumps to stdout when passed output: :stdout" do
+    stdout = ruby_exe('ObjectSpace.dump("abc", output: :stdout)', options: "-robjspace").chomp
+    stdout.should include('"value":"abc"')
+  end
+
+  it "dumps to provided IO when passed output: IO" do
+    filename = tmp("io_read.txt")
+    io = File.open(filename, "w+")
+    result = ObjectSpace.dump("abc", output: io)
+    result.should.equal? io
+
+    io.rewind
+    io.read.should include('"value":"abc"')
+  ensure
+    io.close
+    rm_r filename
+  end
+
+  it "raises ArgumentError when passed not supported :output value" do
+    -> { ObjectSpace.dump("abc", output: Object.new) }.should raise_error(ArgumentError, /wrong output option/)
+  end
+end