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33 lines
789 B
Ruby
33 lines
789 B
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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require File.expand_path('../fixtures/classes', __FILE__)
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describe "IO#printf" do
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before :each do
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@name = tmp("io_printf.txt")
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@io = new_io @name
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@io.sync = true
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end
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after :each do
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@io.close if @io
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rm_r @name
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end
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it "calls #to_str to convert the format object to a String" do
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obj = mock("printf format")
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obj.should_receive(:to_str).and_return("%s")
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@io.printf obj, "printf"
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File.read(@name).should == "printf"
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end
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it "writes the #sprintf formatted string" do
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@io.printf "%d %s", 5, "cookies"
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File.read(@name).should == "5 cookies"
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end
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it "raises IOError on closed stream" do
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lambda { IOSpecs.closed_io.printf("stuff") }.should raise_error(IOError)
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end
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end
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