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require_relative '../../spec_helper'
require_relative '../../shared/kernel/complex'
require_relative 'fixtures/to_c'
describe "String#to_c" do
it_behaves_like :kernel_complex, :to_c_method, StringSpecs
end
describe "String#to_c" do
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
it "ignores trailing garbage" do
'79+4iruby'.to_c.should == Complex(79, 4)
'7__9+4__0i'.to_c.should == Complex(7, 0)
end
context "it treats special float value strings as characters" do
it "parses any string that starts with 'I' as 1i" do
'Infinity'.to_c.should == Complex(0, 1)
'-Infinity'.to_c.should == Complex(0, -1)
'Insecure'.to_c.should == Complex(0, 1)
'-Insecure'.to_c.should == Complex(0, -1)
end
it "does not parse any numeric information in 'NaN'" do
'NaN'.to_c.should == Complex(0, 0)
end
end
it "allows null-byte" do
"1-2i\0".to_c.should == Complex(1, -2)
"1\0-2i".to_c.should == Complex(1, 0)
"\01-2i".to_c.should == Complex(0, 0)
end
it "raises Encoding::CompatibilityError if String is in not ASCII-compatible encoding" do
-> {
'79+4i'.encode("UTF-16").to_c
}.should raise_error(Encoding::CompatibilityError, "ASCII incompatible encoding: UTF-16")
end
it "treats a sequence of underscores as an end of Complex string" do
"5+3_1i".to_c.should == Complex(5, 31)
"5+3__1i".to_c.should == Complex(5)
"5+3___1i".to_c.should == Complex(5)
"12_3".to_c.should == Complex(123)
"12__3".to_c.should == Complex(12)
"12___3".to_c.should == Complex(12)
end
end
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