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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes.rb', __FILE__)
describe "String#lstrip" do
it "returns a copy of self with leading whitespace removed" do
" hello ".lstrip.should == "hello "
" hello world ".lstrip.should == "hello world "
"\n\r\t\n\v\r hello world ".lstrip.should == "hello world "
"hello".lstrip.should == "hello"
"\000 \000hello\000 \000".lstrip.should == "\000 \000hello\000 \000"
end
it "does not strip leading \\0" do
"\x00hello".lstrip.should == "\x00hello"
end
it "taints the result when self is tainted" do
"".taint.lstrip.tainted?.should == true
"ok".taint.lstrip.tainted?.should == true
" ok".taint.lstrip.tainted?.should == true
end
end
describe "String#lstrip!" do
it "modifies self in place and returns self" do
a = " hello "
a.lstrip!.should equal(a)
a.should == "hello "
a = "\000 \000hello\000 \000"
a.lstrip!
a.should == "\000 \000hello\000 \000"
end
it "returns nil if no modifications were made" do
a = "hello"
a.lstrip!.should == nil
a.should == "hello"
end
it "raises a RuntimeError on a frozen instance that is modified" do
lambda { " hello ".freeze.lstrip! }.should raise_error(RuntimeError)
end
# see [ruby-core:23657]
it "raises a RuntimeError on a frozen instance that would not be modified" do
lambda { "hello".freeze.lstrip! }.should raise_error(RuntimeError)
lambda { "".freeze.lstrip! }.should raise_error(RuntimeError)
end
end
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