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-rw-r--r--spec/ruby/core/string/to_c_spec.rb99
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diff --git a/spec/ruby/core/string/to_c_spec.rb b/spec/ruby/core/string/to_c_spec.rb
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+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "String#to_c" do
+ it "returns a Complex object" do
+ '9'.to_c.should be_an_instance_of(Complex)
+ end
+
+ it "understands integers" do
+ '20'.to_c.should == Complex(20)
+ end
+
+ it "understands negative integers" do
+ '-3'.to_c.should == Complex(-3)
+ end
+
+ it "understands fractions (numerator/denominator) for the real part" do
+ '2/3'.to_c.should == Complex(Rational(2, 3))
+ end
+
+ it "understands fractions (numerator/denominator) for the imaginary part" do
+ '4+2/3i'.to_c.should == Complex(4, Rational(2, 3))
+ end
+
+ it "understands negative fractions (-numerator/denominator) for the real part" do
+ '-2/3'.to_c.should == Complex(Rational(-2, 3))
+ end
+
+ it "understands negative fractions (-numerator/denominator) for the imaginary part" do
+ '7-2/3i'.to_c.should == Complex(7, Rational(-2, 3))
+ end
+
+ it "understands floats (a.b) for the real part" do
+ '2.3'.to_c.should == Complex(2.3)
+ end
+
+ it "understands floats (a.b) for the imaginary part" do
+ '4+2.3i'.to_c.should == Complex(4, 2.3)
+ end
+
+ it "understands negative floats (-a.b) for the real part" do
+ '-2.33'.to_c.should == Complex(-2.33)
+ end
+
+ it "understands negative floats (-a.b) for the imaginary part" do
+ '7-28.771i'.to_c.should == Complex(7, -28.771)
+ end
+
+ it "understands an integer followed by 'i' to mean that integer is the imaginary part" do
+ '35i'.to_c.should == Complex(0,35)
+ end
+
+ it "understands a negative integer followed by 'i' to mean that negative integer is the imaginary part" do
+ '-29i'.to_c.should == Complex(0,-29)
+ end
+
+ it "understands an 'i' by itself as denoting a complex number with an imaginary part of 1" do
+ 'i'.to_c.should == Complex(0,1)
+ end
+
+ it "understands a '-i' by itself as denoting a complex number with an imaginary part of -1" do
+ '-i'.to_c.should == Complex(0,-1)
+ end
+
+ it "understands 'a+bi' to mean a complex number with 'a' as the real part, 'b' as the imaginary" do
+ '79+4i'.to_c.should == Complex(79,4)
+ end
+
+ it "understands 'a-bi' to mean a complex number with 'a' as the real part, '-b' as the imaginary" do
+ '79-4i'.to_c.should == Complex(79,-4)
+ end
+
+ it "understands scientific notation for the real part" do
+ '2e3+4i'.to_c.should == Complex(2e3,4)
+ end
+
+ it "understands negative scientific notation for the real part" do
+ '-2e3+4i'.to_c.should == Complex(-2e3,4)
+ end
+
+ it "understands scientific notation for the imaginary part" do
+ '4+2e3i'.to_c.should == Complex(4, 2e3)
+ end
+
+ it "understands negative scientific notation for the imaginary part" do
+ '4-2e3i'.to_c.should == Complex(4, -2e3)
+ end
+
+ it "understands scientific notation for the real and imaginary part in the same String" do
+ '2e3+2e4i'.to_c.should == Complex(2e3,2e4)
+ end
+
+ it "understands negative scientific notation for the real and imaginary part in the same String" do
+ '-2e3-2e4i'.to_c.should == Complex(-2e3,-2e4)
+ end
+
+ it "returns a complex number with 0 as the real part, 0 as the imaginary part for unrecognised Strings" do
+ 'ruby'.to_c.should == Complex(0,0)
+ end
+end