2018-03-04 10:09:32 -05:00
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require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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require_relative '../../core/kernel/shared/sprintf'
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2017-05-07 08:04:49 -04:00
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describe "StringIO#printf" 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 nil" do
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@io.printf("%d %04x", 123, 123).should be_nil
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end
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it "pads self with \\000 when the current position is after the end" do
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@io.pos = 10
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@io.printf("%d", 123)
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@io.string.should == "example\000\000\000123"
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end
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it "performs format conversion" do
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@io.printf("%d %04x", 123, 123)
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@io.string.should == "123 007b"
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end
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it "updates the current position" do
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@io.printf("%d %04x", 123, 123)
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@io.pos.should eql(8)
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@io.printf("%d %04x", 123, 123)
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@io.pos.should eql(16)
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2017-06-29 10:35:37 -04:00
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end
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2017-12-01 10:41:50 -05:00
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describe "formatting" do
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2019-07-27 06:40:09 -04:00
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it_behaves_like :kernel_sprintf, -> format, *args {
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2020-07-20 00:38:37 -04:00
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io = StringIO.new(+"")
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2017-12-01 10:41:50 -05:00
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io.printf(format, *args)
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io.string
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}
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end
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2017-05-07 08:04:49 -04:00
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end
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describe "StringIO#printf when in append mode" do
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before :each do
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@io = StringIO.new("example", "a")
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end
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it "appends the passed argument to the end of self" do
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@io.printf("%d %04x", 123, 123)
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@io.string.should == "example123 007b"
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@io.printf("%d %04x", 123, 123)
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@io.string.should == "example123 007b123 007b"
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end
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it "correctly updates self's position" do
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@io.printf("%d %04x", 123, 123)
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@io.pos.should eql(15)
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end
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end
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describe "StringIO#printf when self is not writable" do
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it "raises an IOError" do
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io = StringIO.new("test", "r")
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2019-07-27 06:40:09 -04:00
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-> { io.printf("test") }.should raise_error(IOError)
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2017-05-07 08:04:49 -04:00
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io = StringIO.new("test")
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io.close_write
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2019-07-27 06:40:09 -04:00
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-> { io.printf("test") }.should raise_error(IOError)
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2017-05-07 08:04:49 -04:00
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end
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end
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