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Diffstat (limited to 'spec/ruby/core/string/casecmp_spec.rb')
| -rw-r--r-- | spec/ruby/core/string/casecmp_spec.rb | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/spec/ruby/core/string/casecmp_spec.rb b/spec/ruby/core/string/casecmp_spec.rb new file mode 100644 index 0000000000..90577aaac0 --- /dev/null +++ b/spec/ruby/core/string/casecmp_spec.rb @@ -0,0 +1,204 @@ +# -*- encoding: utf-8 -*- +require_relative '../../spec_helper' +require_relative 'fixtures/classes' + +describe "String#casecmp independent of case" do + it "returns -1 when less than other" do + "a".casecmp("b").should == -1 + "A".casecmp("b").should == -1 + end + + it "returns 0 when equal to other" do + "a".casecmp("a").should == 0 + "A".casecmp("a").should == 0 + end + + it "returns 1 when greater than other" do + "b".casecmp("a").should == 1 + "B".casecmp("a").should == 1 + end + + it "tries to convert other to string using to_str" do + other = mock('x') + other.should_receive(:to_str).and_return("abc") + + "abc".casecmp(other).should == 0 + end + + it "returns nil if other can't be converted to a string" do + "abc".casecmp(mock('abc')).should == nil + end + + it "returns nil if incompatible encodings" do + "あれ".casecmp("れ".encode(Encoding::EUC_JP)).should == nil + end + + describe "in UTF-8 mode" do + describe "for non-ASCII characters" do + before :each do + @upper_a_tilde = "Ã" + @lower_a_tilde = "ã" + @upper_a_umlaut = "Ä" + @lower_a_umlaut = "ä" + end + + it "returns -1 when numerically less than other" do + @upper_a_tilde.casecmp(@lower_a_tilde).should == -1 + @upper_a_tilde.casecmp(@upper_a_umlaut).should == -1 + end + + it "returns 0 when numerically equal to other" do + @upper_a_tilde.casecmp(@upper_a_tilde).should == 0 + end + + it "returns 1 when numerically greater than other" do + @lower_a_umlaut.casecmp(@upper_a_umlaut).should == 1 + @lower_a_umlaut.casecmp(@lower_a_tilde).should == 1 + end + end + + describe "for ASCII characters" do + it "returns -1 when less than other" do + "a".casecmp("b").should == -1 + "A".casecmp("b").should == -1 + end + + it "returns 0 when equal to other" do + "a".casecmp("a").should == 0 + "A".casecmp("a").should == 0 + end + + it "returns 1 when greater than other" do + "b".casecmp("a").should == 1 + "B".casecmp("a").should == 1 + end + end + end + + describe "for non-ASCII characters" do + before :each do + @upper_a_tilde = "\xc3" + @lower_a_tilde = "\xe3" + end + + it "returns -1 when numerically less than other" do + @upper_a_tilde.casecmp(@lower_a_tilde).should == -1 + end + + it "returns 0 when equal to other" do + @upper_a_tilde.casecmp("\xc3").should == 0 + end + + it "returns 1 when numerically greater than other" do + @lower_a_tilde.casecmp(@upper_a_tilde).should == 1 + end + + it "does not case fold" do + "ß".casecmp("ss").should == 1 + end + end + + describe "when comparing a subclass instance" do + it "returns -1 when less than other" do + b = StringSpecs::MyString.new "b" + "a".casecmp(b).should == -1 + "A".casecmp(b).should == -1 + end + + it "returns 0 when equal to other" do + a = StringSpecs::MyString.new "a" + "a".casecmp(a).should == 0 + "A".casecmp(a).should == 0 + end + + it "returns 1 when greater than other" do + a = StringSpecs::MyString.new "a" + "b".casecmp(a).should == 1 + "B".casecmp(a).should == 1 + end + end + + it "returns 0 for empty strings in different encodings" do + ''.b.casecmp('').should == 0 + ''.b.casecmp(''.encode("UTF-32LE")).should == 0 + end +end + +describe 'String#casecmp? independent of case' do + it 'returns true when equal to other' do + 'abc'.casecmp?('abc').should == true + 'abc'.casecmp?('ABC').should == true + end + + it 'returns false when not equal to other' do + 'abc'.casecmp?('DEF').should == false + 'abc'.casecmp?('def').should == false + end + + it "tries to convert other to string using to_str" do + other = mock('x') + other.should_receive(:to_str).and_return("abc") + + "abc".casecmp?(other).should == true + end + + it "returns nil if incompatible encodings" do + "あれ".casecmp?("れ".encode(Encoding::EUC_JP)).should == nil + end + + describe 'for UNICODE characters' do + it 'returns true when downcase(:fold) on unicode' do + 'äöü'.casecmp?('ÄÖÜ').should == true + end + end + + describe "when comparing a subclass instance" do + it 'returns true when equal to other' do + a = StringSpecs::MyString.new "a" + 'a'.casecmp?(a).should == true + 'A'.casecmp?(a).should == true + end + + it 'returns false when not equal to other' do + b = StringSpecs::MyString.new "a" + 'b'.casecmp?(b).should == false + 'B'.casecmp?(b).should == false + end + end + + describe "in UTF-8 mode" do + describe "for non-ASCII characters" do + before :each do + @upper_a_tilde = "Ã" + @lower_a_tilde = "ã" + @upper_a_umlaut = "Ä" + @lower_a_umlaut = "ä" + end + + it "returns true when they are the same with normalized case" do + @upper_a_tilde.casecmp?(@lower_a_tilde).should == true + end + + it "returns false when they are unrelated" do + @upper_a_tilde.casecmp?(@upper_a_umlaut).should == false + end + + it "returns true when they have the same bytes" do + @upper_a_tilde.casecmp?(@upper_a_tilde).should == true + end + end + end + + it "case folds" do + "ß".casecmp?("ss").should == true + end + + it "returns nil if other can't be converted to a string" do + "abc".casecmp?(mock('abc')).should == nil + end + + it "returns true for empty strings in different encodings" do + ''.b.should.casecmp?('') + ''.b.should.casecmp?(''.encode("UTF-32LE")) + end +end |