1 files changed, 111 insertions, 0 deletions
diff --git a/spec/rubyspec/core/string/casecmp_spec.rb b/spec/rubyspec/core/string/casecmp_spec.rb
new file mode 100644
index 0000000000..c5503a18bf
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+++ b/spec/rubyspec/core/string/casecmp_spec.rb
@@ -0,0 +1,111 @@
+# -*- 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('abc')
+    def other.to_str() "abc" end
+    "abc".casecmp(other).should == 0
+  end
+
+  it "raises a TypeError if other can't be converted to a string" do
+    lambda { "abc".casecmp(mock('abc')) }.should raise_error(TypeError)
+  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