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127 lines
3.3 KiB
Ruby
127 lines
3.3 KiB
Ruby
describe :stringio_read, shared: true do
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before :each do
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@io = StringIO.new("example")
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end
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it "returns the passed buffer String" do
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# Note: Rubinius bug:
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# @io.send(@method, 7, buffer = "").should equal(buffer)
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ret = @io.send(@method, 7, buffer = "")
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ret.should equal(buffer)
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end
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it "reads length bytes and writes them to the buffer String" do
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@io.send(@method, 7, buffer = "")
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buffer.should == "example"
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end
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it "tries to convert the passed buffer Object to a String using #to_str" do
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obj = mock("to_str")
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obj.should_receive(:to_str).and_return(buffer = "")
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@io.send(@method, 7, obj)
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buffer.should == "example"
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end
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it "raises a TypeError when the passed buffer Object can't be converted to a String" do
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-> { @io.send(@method, 7, Object.new) }.should raise_error(TypeError)
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end
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it "raises a FrozenError error when passed a frozen String as buffer" do
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-> { @io.send(@method, 7, "".freeze) }.should raise_error(FrozenError)
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end
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end
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describe :stringio_read_length, shared: true do
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before :each do
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@io = StringIO.new("example")
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end
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it "reads length bytes from the current position and returns them" do
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@io.pos = 3
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@io.send(@method, 4).should == "mple"
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end
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it "reads at most the whole content" do
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@io.send(@method, 999).should == "example"
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end
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it "correctly updates the position" do
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@io.send(@method, 3)
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@io.pos.should eql(3)
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@io.send(@method, 999)
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@io.pos.should eql(7)
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end
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it "tries to convert the passed length to an Integer using #to_int" do
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obj = mock("to_int")
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obj.should_receive(:to_int).and_return(7)
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@io.send(@method, obj).should == "example"
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end
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it "raises a TypeError when the passed length can't be converted to an Integer" do
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-> { @io.send(@method, Object.new) }.should raise_error(TypeError)
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end
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it "raises a TypeError when the passed length is negative" do
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-> { @io.send(@method, -2) }.should raise_error(ArgumentError)
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end
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it "returns a binary String" do
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@io.send(@method, 4).encoding.should == Encoding::BINARY
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end
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end
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describe :stringio_read_no_arguments, shared: true do
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before :each do
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@io = StringIO.new("example")
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end
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it "reads the whole content starting from the current position" do
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@io.send(@method).should == "example"
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@io.pos = 3
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@io.send(@method).should == "mple"
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end
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it "correctly updates the current position" do
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@io.send(@method)
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@io.pos.should eql(7)
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end
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it "correctly update the current position in bytes when multi-byte characters are used" do
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@io.print("example\u03A3") # Overwrite the original string with 8 characters containing 9 bytes.
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@io.send(@method)
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@io.pos.should eql(9)
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end
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end
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describe :stringio_read_nil, shared: true do
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before :each do
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@io = StringIO.new("example")
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end
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it "returns the remaining content from the current position" do
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@io.send(@method, nil).should == "example"
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@io.pos = 4
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@io.send(@method, nil).should == "ple"
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end
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it "updates the current position" do
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@io.send(@method, nil)
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@io.pos.should eql(7)
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end
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end
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describe :stringio_read_not_readable, shared: true do
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it "raises an IOError" do
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io = StringIO.new("test", "w")
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-> { io.send(@method) }.should raise_error(IOError)
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io = StringIO.new("test")
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io.close_read
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-> { io.send(@method) }.should raise_error(IOError)
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end
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end
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