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88 lines
2 KiB
Ruby
88 lines
2 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "StringIO#putc when passed [String]" 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 "overwrites the character at the current position" do
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@io.putc("t")
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@io.string.should == "txample"
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@io.pos = 3
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@io.putc("t")
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@io.string.should == "txatple"
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end
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it "only writes the first character from the passed String" do
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@io.putc("test")
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@io.string.should == "txample"
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end
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it "returns the passed String" do
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str = "test"
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@io.putc(str).should equal(str)
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end
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it "correctly updates the current position" do
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@io.putc("t")
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@io.pos.should == 1
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@io.putc("test")
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@io.pos.should == 2
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@io.putc("t")
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@io.pos.should == 3
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end
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end
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describe "StringIO#putc when passed [Object]" 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 "it writes the passed Integer % 256 to self" do
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@io.putc(333) # 333 % 256 == ?M
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@io.string.should == "Mxample"
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@io.putc(-450) # -450 % 256 == ?>
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@io.string.should == "M>ample"
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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.putc(?A)
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@io.string.should == "example\000\000\000A"
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end
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it "tries to convert the passed argument 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(116)
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@io.putc(obj)
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@io.string.should == "txample"
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end
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it "raises a TypeError when the passed argument can't be coerced to Integer" do
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-> { @io.putc(Object.new) }.should raise_error(TypeError)
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end
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end
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describe "StringIO#putc when in append mode" do
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it "appends to the end of self" do
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io = StringIO.new("test", "a")
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io.putc(?t)
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io.string.should == "testt"
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end
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end
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describe "StringIO#putc 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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-> { io.putc(?a) }.should raise_error(IOError)
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io = StringIO.new("test")
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io.close_write
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-> { io.putc("t") }.should raise_error(IOError)
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end
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end
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