[macruby-changes] [1413] MacRuby/branches/experimental/spec/frozen/core/string/getbyte_spec. rb

[source_changes at macosforge.org]

Revision: 1413
          http://trac.macosforge.org/projects/ruby/changeset/1413
Author:   vincent.isambart at gmail.com
Date:     2009-04-13 00:43:53 -0700 (Mon, 13 Apr 2009)
Log Message:
-----------
a spec for the 1.9-only String#getbyte

Added Paths:
-----------
    MacRuby/branches/experimental/spec/frozen/core/string/getbyte_spec.rb

Added: MacRuby/branches/experimental/spec/frozen/core/string/getbyte_spec.rb
===================================================================
--- MacRuby/branches/experimental/spec/frozen/core/string/getbyte_spec.rb	                        (rev 0)
+++ MacRuby/branches/experimental/spec/frozen/core/string/getbyte_spec.rb	2009-04-13 07:43:53 UTC (rev 1413)
@@ -0,0 +1,37 @@
+# coding: UTF-8
+ruby_version_is "1.9" do
+  describe "String#getbyte" do
+    it "returns the same value whatever the encoding, even if valid_encoding? is false" do
+      str = 'こんにちは'
+      ['ASCII-8BIT', 'EUC-JP'].each do |encoding|
+        str2 = str.dup
+        str2.force_encoding(encoding)
+        (1...str.bytesize).each do |i|
+          str2.getbyte(i).should == str.getbyte(i)
+        end
+      end
+    end
+
+    it "returns the (n+1)th byte from the start of a string if n >= 0" do
+      str = "\xE3\x81\x82" # 'あ' in UTF-8
+      str.getbyte(0).should == 0xE3
+      str.getbyte(1).should == 0x81
+      str.getbyte(2).should == 0x82
+    end
+
+    it "returns the (-n)th byte from the end of a string if n < 0" do
+      str = "\xE3\x81\x82" # 'あ' in UTF-8
+      str.getbyte(-3).should == 0xE3
+      str.getbyte(-2).should == 0x81
+      str.getbyte(-1).should == 0x82
+    end
+
+    it "returns nil for an offset outside the string" do
+      str = "abcdef"
+      str.getbyte(6).should be_nil
+      str.getbyte(100).should be_nil
+      str.getbyte(-100).should be_nil
+      str.getbyte(-7).should be_nil
+    end
+  end
+end
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