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Diffstat (limited to 'spec/ruby/shared/complex/Complex.rb')
-rw-r--r-- | spec/ruby/shared/complex/Complex.rb | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/spec/ruby/shared/complex/Complex.rb b/spec/ruby/shared/complex/Complex.rb new file mode 100644 index 0000000000..5a9715b161 --- /dev/null +++ b/spec/ruby/shared/complex/Complex.rb @@ -0,0 +1,133 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe :kernel_Complex, shared: true do + describe "when passed [Complex, Complex]" do + it "returns a new Complex number based on the two given numbers" do + Complex(Complex(3, 4), Complex(5, 6)).should == Complex(3 - 6, 4 + 5) + Complex(Complex(1.5, 2), Complex(-5, 6.3)).should == Complex(1.5 - 6.3, 2 - 5) + end + end + + describe "when passed [Complex]" do + it "returns the passed Complex number" do + Complex(Complex(1, 2)).should == Complex(1, 2) + Complex(Complex(-3.4, bignum_value)).should == Complex(-3.4, bignum_value) + end + end + + describe "when passed [Integer, Integer]" do + it "returns a new Complex number" do + Complex(1, 2).should be_an_instance_of(Complex) + Complex(1, 2).real.should == 1 + Complex(1, 2).imag.should == 2 + + Complex(-3, -5).should be_an_instance_of(Complex) + Complex(-3, -5).real.should == -3 + Complex(-3, -5).imag.should == -5 + + Complex(3.5, -4.5).should be_an_instance_of(Complex) + Complex(3.5, -4.5).real.should == 3.5 + Complex(3.5, -4.5).imag.should == -4.5 + + Complex(bignum_value, 30).should be_an_instance_of(Complex) + Complex(bignum_value, 30).real.should == bignum_value + Complex(bignum_value, 30).imag.should == 30 + end + end + + describe "when passed [Integer]" do + it "returns a new Complex number with 0 as the imaginary component" do + # Guard against the Mathn library + conflicts_with :Prime do + Complex(1).should be_an_instance_of(Complex) + Complex(1).imag.should == 0 + Complex(1).real.should == 1 + + Complex(-3).should be_an_instance_of(Complex) + Complex(-3).imag.should == 0 + Complex(-3).real.should == -3 + + Complex(-4.5).should be_an_instance_of(Complex) + Complex(-4.5).imag.should == 0 + Complex(-4.5).real.should == -4.5 + + Complex(bignum_value).should be_an_instance_of(Complex) + Complex(bignum_value).imag.should == 0 + Complex(bignum_value).real.should == bignum_value + end + end + end + + describe "when passed a String" do + it "needs to be reviewed for spec completeness" + end + + describe "when passed an Objectc which responds to #to_c" do + it "returns the passed argument" do + obj = Object.new; def obj.to_c; 1i end + Complex(obj).should == Complex(0, 1) + end + end + + describe "when passed a Numeric which responds to #real? with false" do + it "returns the passed argument" do + n = mock_numeric("unreal") + n.should_receive(:real?).and_return(false) + Complex(n).should equal(n) + end + end + + describe "when passed a Numeric which responds to #real? with true" do + it "returns a Complex with the passed argument as the real component and 0 as the imaginary component" do + n = mock_numeric("real") + n.should_receive(:real?).any_number_of_times.and_return(true) + result = Complex(n) + result.real.should equal(n) + result.imag.should equal(0) + end + end + + describe "when passed Numerics n1 and n2 and at least one responds to #real? with false" do + [[false, false], [false, true], [true, false]].each do |r1, r2| + it "returns n1 + n2 * Complex(0, 1)" do + n1 = mock_numeric("n1") + n2 = mock_numeric("n2") + n3 = mock_numeric("n3") + n4 = mock_numeric("n4") + n1.should_receive(:real?).any_number_of_times.and_return(r1) + n2.should_receive(:real?).any_number_of_times.and_return(r2) + n2.should_receive(:*).with(Complex(0, 1)).and_return(n3) + n1.should_receive(:+).with(n3).and_return(n4) + Complex(n1, n2).should equal(n4) + end + end + end + + describe "when passed two Numerics and both respond to #real? with true" do + it "returns a Complex with the passed arguments as real and imaginary components respectively" do + n1 = mock_numeric("n1") + n2 = mock_numeric("n2") + n1.should_receive(:real?).any_number_of_times.and_return(true) + n2.should_receive(:real?).any_number_of_times.and_return(true) + result = Complex(n1, n2) + result.real.should equal(n1) + result.imag.should equal(n2) + end + end + + describe "when passed a single non-Numeric" do + it "coerces the passed argument using #to_c" do + n = mock("n") + c = Complex(0, 0) + n.should_receive(:to_c).and_return(c) + Complex(n).should equal(c) + end + end + + describe "when passed a non-Numeric second argument" do + it "raises TypeError" do + lambda { Complex.send(@method, :sym, :sym) }.should raise_error(TypeError) + lambda { Complex.send(@method, 0, :sym) }.should raise_error(TypeError) + end + end +end |