lib/rb/spec/union_spec.rb

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require File.dirname(__FILE__) + '/spec_helper'

class ThriftUnionSpec < Spec::ExampleGroup
  include Thrift
  include SpecNamespace

  describe Union do
    it "should return nil value in unset union" do
      union = My_union.new
      union.get_set_field.should == nil
      union.get_value.should == nil
    end

    it "should set a field and be accessible through get_value and the named field accessor" do
      union = My_union.new
      union.integer32 = 25
      union.get_set_field.should == :integer32
      union.get_value.should == 25
      union.integer32.should == 25
    end

    it "should work correctly when instantiated with static field constructors" do
      union = My_union.integer32(5)
      union.get_set_field.should == :integer32
      union.integer32.should == 5
    end

    it "should raise for wrong set field" do
      union = My_union.new
      union.integer32 = 25
      lambda { union.some_characters }.should raise_error(RuntimeError, "some_characters is not union's set field.")
    end
     
    it "should not be equal to nil" do
      union = My_union.new
      union.should_not == nil
    end
     
    it "should not equate two different unions, i32 vs. string" do
      union = My_union.new(:integer32, 25)
      other_union = My_union.new(:some_characters, "blah!")
      union.should_not == other_union
    end

    it "should properly reset setfield and setvalue" do
      union = My_union.new(:integer32, 25)
      union.get_set_field.should == :integer32
      union.some_characters = "blah!"
      union.get_set_field.should == :some_characters
      union.get_value.should == "blah!"
      lambda { union.integer32 }.should raise_error(RuntimeError, "integer32 is not union's set field.")
    end

    it "should not equate two different unions with different values" do
      union = My_union.new(:integer32, 25)
      other_union = My_union.new(:integer32, 400)
      union.should_not == other_union
    end

    it "should not equate two different unions with different fields" do
      union = My_union.new(:integer32, 25)
      other_union = My_union.new(:other_i32, 25)
      union.should_not == other_union
    end

    it "should inspect properly" do
      union = My_union.new(:integer32, 25)
      union.inspect.should == "<SpecNamespace::My_union integer32: 25>"
    end

    it "should not allow setting with instance_variable_set" do
      union = My_union.new(:integer32, 27)
      union.instance_variable_set(:@some_characters, "hallo!")
      union.get_set_field.should == :integer32
      union.get_value.should == 27
      lambda { union.some_characters }.should raise_error(RuntimeError, "some_characters is not union's set field.")
    end

    it "should serialize correctly" do
      trans = Thrift::MemoryBufferTransport.new
      proto = Thrift::BinaryProtocol.new(trans)

      union = My_union.new(:integer32, 25)
      union.write(proto)

      other_union = My_union.new(:integer32, 25)
      other_union.read(proto)
      other_union.should == union
    end

    it "should raise when validating unset union" do
      union = My_union.new
      lambda { union.validate }.should raise_error(StandardError, "Union fields are not set.")

      other_union = My_union.new(:integer32, 1)
      lambda { other_union.validate }.should_not raise_error(StandardError, "Union fields are not set.")
    end

    it "should validate an enum field properly" do
      union = TestUnion.new(:enum_field, 3)
      union.get_set_field.should == :enum_field
      lambda { union.validate }.should raise_error(ProtocolException, "Invalid value of field enum_field!")

      other_union = TestUnion.new(:enum_field, 1)
      lambda { other_union.validate }.should_not raise_error(ProtocolException, "Invalid value of field enum_field!")
    end

    it "should properly serialize and match structs with a union" do
      union = My_union.new(:integer32, 26)
      swu = Struct_with_union.new(:fun_union => union)

      trans = Thrift::MemoryBufferTransport.new
      proto = Thrift::CompactProtocol.new(trans)

      swu.write(proto)

      other_union = My_union.new(:some_characters, "hello there")
      swu2 = Struct_with_union.new(:fun_union => other_union)

      swu2.should_not == swu

      swu2.read(proto)
      swu2.should == swu
    end
    
    it "should support old style constructor" do
      union = My_union.new(:integer32 => 26)
      union.get_set_field.should == :integer32
      union.get_value.should == 26
    end
  end
end