1 files changed, 174 insertions, 0 deletions
diff --git a/spec/mspec/spec/helpers/io_spec.rb b/spec/mspec/spec/helpers/io_spec.rb
new file mode 100644
index 0000000000..6dfd81ee56
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+++ b/spec/mspec/spec/helpers/io_spec.rb
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+require 'spec_helper'
+require 'mspec/guards'
+require 'mspec/helpers'
+
+describe IOStub do
+  before :each do
+    @out = IOStub.new
+    @sep = $\
+  end
+
+  after :each do
+    $\ = @sep
+  end
+
+  it "provides a write method" do
+    @out.write "this"
+    @out.should == "this"
+  end
+
+  it "concatenates the arguments sent to write" do
+    @out.write "flim ", "flam"
+    @out.should == "flim flam"
+  end
+
+  it "provides a print method that appends the default separator" do
+    $\ = " [newline] "
+    @out.print "hello"
+    @out.print "world"
+    @out.should == "hello [newline] world [newline] "
+  end
+
+  it "provides a puts method that appends the default separator" do
+    @out.puts "hello", 1, 2, 3
+    @out.should == "hello\n1\n2\n3\n"
+  end
+
+  it "provides a puts method that appends separator if argument not given" do
+    @out.puts
+    @out.should == "\n"
+  end
+
+  it "provides a printf method" do
+    @out.printf "%-10s, %03d, %2.1f", "test", 42, 4.2
+    @out.should == "test      , 042, 4.2"
+  end
+
+  it "provides a flush method that does nothing and returns self" do
+    @out.flush.should == @out
+  end
+end
+
+describe Object, "#new_fd" do
+  before :each do
+    @name = tmp("io_specs")
+    @io = nil
+  end
+
+  after :each do
+    @io.close if @io and not @io.closed?
+    rm_r @name
+  end
+
+  it "returns a Fixnum that can be used to create an IO instance" do
+    fd = new_fd @name
+    fd.should be_an_instance_of(Fixnum)
+
+    @io = IO.new fd, fmode('w:utf-8')
+    @io.sync = true
+    @io.print "io data"
+
+    IO.read(@name).should == "io data"
+  end
+
+  it "accepts an options Hash" do
+    FeatureGuard.stub(:enabled?).and_return(true)
+    fd = new_fd @name, { :mode => 'w:utf-8' }
+    fd.should be_an_instance_of(Fixnum)
+
+    @io = IO.new fd, fmode('w:utf-8')
+    @io.sync = true
+    @io.print "io data"
+
+    IO.read(@name).should == "io data"
+  end
+
+  it "raises an ArgumentError if the options Hash does not include :mode" do
+    FeatureGuard.stub(:enabled?).and_return(true)
+    lambda { new_fd @name, { :encoding => "utf-8" } }.should raise_error(ArgumentError)
+  end
+end
+
+describe Object, "#new_io" do
+  before :each do
+    @name = tmp("io_specs.txt")
+  end
+
+  after :each do
+    @io.close if @io and !@io.closed?
+    rm_r @name
+  end
+
+  it "returns an IO instance" do
+    @io = new_io @name
+    @io.should be_an_instance_of(IO)
+  end
+
+  it "opens the IO for reading if passed 'r'" do
+    touch(@name) { |f| f.print "io data" }
+    @io = new_io @name, "r"
+    @io.read.should == "io data"
+    lambda { @io.puts "more data" }.should raise_error(IOError)
+  end
+
+  it "opens the IO for writing if passed 'w'" do
+    @io = new_io @name, "w"
+    @io.sync = true
+
+    @io.print "io data"
+    IO.read(@name).should == "io data"
+  end
+
+  it "opens the IO for reading if passed { :mode => 'r' }" do
+    touch(@name) { |f| f.print "io data" }
+    @io = new_io @name, { :mode => "r" }
+    @io.read.should == "io data"
+    lambda { @io.puts "more data" }.should raise_error(IOError)
+  end
+
+  it "opens the IO for writing if passed { :mode => 'w' }" do
+    @io = new_io @name, { :mode => "w" }
+    @io.sync = true
+
+    @io.print "io data"
+    IO.read(@name).should == "io data"
+  end
+end
+
+describe Object, "#fmode" do
+  it "returns the argument unmodified if :encoding feature is enabled" do
+    FeatureGuard.should_receive(:enabled?).with(:encoding).and_return(true)
+    fmode("rb:binary:utf-8").should == "rb:binary:utf-8"
+  end
+
+  it "returns only the file access mode if :encoding feature is not enabled" do
+    FeatureGuard.should_receive(:enabled?).with(:encoding).and_return(false)
+    fmode("rb:binary:utf-8").should == "rb"
+  end
+end
+
+describe Object, "#options_or_mode" do
+  describe "if passed a Hash" do
+    it "returns a mode string if :encoding feature is not enabled" do
+      FeatureGuard.should_receive(:enabled?).with(:encoding).twice.and_return(false)
+      options_or_mode(:mode => "rb:binary").should == "rb"
+    end
+
+    it "returns a Hash if :encoding feature is enabled" do
+      FeatureGuard.should_receive(:enabled?).with(:encoding).and_return(true)
+      options_or_mode(:mode => "rb:utf-8").should == { :mode => "rb:utf-8" }
+    end
+  end
+
+  describe "if passed a String" do
+    it "returns only the file access mode if :encoding feature is not enabled" do
+      FeatureGuard.should_receive(:enabled?).with(:encoding).and_return(false)
+      options_or_mode("rb:binary:utf-8").should == "rb"
+    end
+
+    it "returns the argument unmodified if :encoding feature is enabled" do
+      FeatureGuard.should_receive(:enabled?).with(:encoding).and_return(true)
+      options_or_mode("rb:binary:utf-8").should == "rb:binary:utf-8"
+    end
+  end
+end