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-rw-r--r--spec/rubyspec/core/io/syswrite_spec.rb54
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diff --git a/spec/rubyspec/core/io/syswrite_spec.rb b/spec/rubyspec/core/io/syswrite_spec.rb
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+++ b/spec/rubyspec/core/io/syswrite_spec.rb
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+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/write', __FILE__)
+
+describe "IO#syswrite on a file" do
+ before :each do
+ @filename = tmp("IO_syswrite_file") + $$.to_s
+ File.open(@filename, "w") do |file|
+ file.syswrite("012345678901234567890123456789")
+ end
+ @file = File.open(@filename, "r+")
+ @readonly_file = File.open(@filename)
+ end
+
+ after :each do
+ @file.close
+ @readonly_file.close
+ rm_r @filename
+ end
+
+ it "writes all of the string's bytes but does not buffer them" do
+ written = @file.syswrite("abcde")
+ written.should == 5
+ File.open(@filename) do |file|
+ file.sysread(10).should == "abcde56789"
+ file.seek(0)
+ @file.fsync
+ file.sysread(10).should == "abcde56789"
+ end
+ end
+
+ it "warns if called immediately after a buffered IO#write" do
+ @file.write("abcde")
+ lambda { @file.syswrite("fghij") }.should complain(/syswrite/)
+ end
+
+ it "does not warn if called after IO#write with intervening IO#sysread" do
+ @file.syswrite("abcde")
+ @file.sysread(5)
+ lambda { @file.syswrite("fghij") }.should_not complain
+ end
+
+ it "writes to the actual file position when called after buffered IO#read" do
+ @file.read(5)
+ @file.syswrite("abcde")
+ File.open(@filename) do |file|
+ file.sysread(10).should == "01234abcde"
+ end
+ end
+end
+
+describe "IO#syswrite" do
+ it_behaves_like :io_write, :syswrite
+end