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Diffstat (limited to 'spec/ruby/core/string/casecmp_spec.rb')
-rw-r--r-- | spec/ruby/core/string/casecmp_spec.rb | 120 |
1 files changed, 120 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..fdb888ff2b --- /dev/null +++ b/spec/ruby/core/string/casecmp_spec.rb @@ -0,0 +1,120 @@ +# -*- encoding: ascii-8bit -*- +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes.rb', __FILE__) + +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 + + ruby_version_is ""..."2.5" do + it "raises a TypeError if other can't be converted to a string" do + lambda { "abc".casecmp(mock('abc')) }.should raise_error(TypeError) + end + end + + ruby_version_is "2.5" do + it "returns nil if other can't be converted to a string" do + "abc".casecmp(mock('abc')).should be_nil + end + end + + describe "in UTF-8 mode" do + describe "for non-ASCII characters" do + before :each do + @upper_a_tilde = "\xc3\x83" + @lower_a_tilde = "\xc3\xa3" + @upper_a_umlaut = "\xc3\x84" + @lower_a_umlaut = "\xc3\xa4" + 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 + 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 +end |