修正测试用例，建立固定Bucket（用后不删除），避免631响应码问题。

spec/qiniu/image_spec.rb

@@ -11,12 +11,14 @@ module Qiniu
 
       before :all do
 
-        @bucket = 'RubySdkTest' + (Time.now.to_i+rand(1000)).to_s
-        @key = "image_logo_for_test.png"
+        ### 复用RubySDK-Test-Storage空间
+        @bucket = 'RubySDK-Test-Storage'
 
+        ### 尝试创建空间
         result = Qiniu.mkbucket(@bucket)
         puts result.inspect
-        result.should be_true
+
+        @key = "image_logo_for_test.png"
 
         local_file = File.expand_path('../' + @key, __FILE__)
 
@@ -53,9 +55,7 @@ module Qiniu
       end
 
       after :all do
-        result = Qiniu.drop(@bucket)
-        puts result.inspect
-        result.should_not be_false
+        ### 不删除Bucket以备下次使用
       end
 
       context ".info" do

spec/qiniu/management_spec.rb

@@ -12,13 +12,13 @@ module Qiniu
 
       before :all do
         @bucket = 'RubySDK-Test-Management'
-        @key = Digest::SHA1.hexdigest((Time.now.to_i+rand(100)).to_s)
-        @key2 = @key + rand(100).to_s
 
         ### 尝试创建Bucket
-        code, data = Storage.mkbucket(@bucket)
-        puts [code, data].inspect
-        code.should == 200
+        result = Qiniu.mkbucket(@bucket)
+        puts result.inspect
+
+        @key = Digest::SHA1.hexdigest((Time.now.to_i+rand(100)).to_s)
+        @key2 = @key + rand(100).to_s
       end
 
       after :all do

spec/qiniu/misc_spec.rb

@@ -12,9 +12,13 @@ module Qiniu
       before :all do
         ### 复用RubySDK-Test-Management空间
         @bucket = 'RubySDK-Test-Management'
+
+        result = Qiniu.mkbucket(@bucket)
+        puts result.inspect
       end
 
       after :all do
+        ### 不删除Bucket以备下次使用
       end
 
       context ".set_protected" do

spec/qiniu/upload_spec.rb

@@ -11,6 +11,11 @@ module Qiniu
 
       before :all do
         @bucket = 'RubySDK-Test-Storage'
+
+        ### 尝试创建Bucket
+        result = Qiniu.mkbucket(@bucket)
+        puts result.inspect
+
         @key = Digest::SHA1.hexdigest((Time.now.to_i+rand(100)).to_s)
 
         @localfile_5m = "5M.txt"
@@ -28,10 +33,6 @@ module Qiniu
         @localfile_1m = "1M.txt"
         File.open(@localfile_1m, "w"){|f| (1 << 20).times{ f.write(rand(9).to_s) }}
         @key_1m = Digest::SHA1.hexdigest(@localfile_1m+Time.now.to_s)
-
-        ### 尝试创建Bucket
-        result = Qiniu.mkbucket(@bucket)
-        puts result.inspect
       end
 
       after :all do