1 files changed, 78 insertions, 0 deletions
diff --git a/spec/rubyspec/core/io/shared/binwrite.rb b/spec/rubyspec/core/io/shared/binwrite.rb
new file mode 100644
index 0000000000..67f0fd5c86
--- /dev/null
+++ b/spec/rubyspec/core/io/shared/binwrite.rb
@@ -0,0 +1,78 @@
+require File.expand_path('../../fixtures/classes', __FILE__)
+
+describe :io_binwrite, shared: true do
+  before :each do
+    @filename = tmp("IO_binwrite_file") + $$.to_s
+    File.open(@filename, "w") do |file|
+      file << "012345678901234567890123456789"
+    end
+  end
+
+  after :each do
+    rm_r @filename
+  end
+
+  it "coerces the argument to a string using to_s" do
+    (obj = mock('test')).should_receive(:to_s).and_return('a string')
+    IO.send(@method, @filename, obj)
+  end
+
+  it "returns the number of bytes written" do
+    IO.send(@method, @filename, "abcde").should == 5
+  end
+
+  it "creates a file if missing" do
+    fn = @filename + "xxx"
+    begin
+      File.exist?(fn).should be_false
+      IO.send(@method, fn, "test")
+      File.exist?(fn).should be_true
+    ensure
+      rm_r fn
+    end
+  end
+
+  it "creates file if missing even if offset given" do
+    fn = @filename + "xxx"
+    begin
+      File.exist?(fn).should be_false
+      IO.send(@method, fn, "test", 0)
+      File.exist?(fn).should be_true
+    ensure
+      rm_r fn
+    end
+  end
+
+  it "truncates the file and writes the given string" do
+    IO.send(@method, @filename, "hello, world!")
+    File.read(@filename).should == "hello, world!"
+  end
+
+  it "doesn't truncate the file and writes the given string if an offset is given" do
+    IO.send(@method, @filename, "hello, world!", 0)
+    File.read(@filename).should == "hello, world!34567890123456789"
+    IO.send(@method, @filename, "hello, world!", 20)
+    File.read(@filename).should == "hello, world!3456789hello, world!"
+  end
+
+  it "doesn't truncate and writes at the given offset after passing empty opts" do
+    IO.send(@method, @filename, "hello world!", 1, {})
+    File.read(@filename).should == "0hello world!34567890123456789"
+  end
+
+  it "accepts a :mode option" do
+    IO.send(@method, @filename, "hello, world!", mode: 'a')
+    File.read(@filename).should == "012345678901234567890123456789hello, world!"
+    IO.send(@method, @filename, "foo", 2, mode: 'w')
+    File.read(@filename).should == "\0\0foo"
+  end
+
+  it "raises an error if readonly mode is specified" do
+    lambda { IO.send(@method, @filename, "abcde", mode: "r") }.should raise_error(IOError)
+  end
+
+  it "truncates if empty :opts provided and offset skipped" do
+    IO.send(@method, @filename, "hello, world!", {})
+    File.read(@filename).should == "hello, world!"
+  end
+end