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77 lines
2.3 KiB
Ruby
77 lines
2.3 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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require_relative 'shared/strip'
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describe "String#lstrip" do
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it_behaves_like :string_strip, :lstrip
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it "returns a copy of self with leading whitespace removed" do
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" hello ".lstrip.should == "hello "
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" hello world ".lstrip.should == "hello world "
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"\n\r\t\n\v\r hello world ".lstrip.should == "hello world "
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"hello".lstrip.should == "hello"
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" こにちわ".lstrip.should == "こにちわ"
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end
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it "works with lazy substrings" do
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" hello "[1...-1].lstrip.should == "hello "
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" hello world "[1...-1].lstrip.should == "hello world "
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"\n\r\t\n\v\r hello world "[1...-1].lstrip.should == "hello world "
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" こにちわ "[1...-1].lstrip.should == "こにちわ"
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end
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ruby_version_is '3.0' do
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it "strips leading \\0" do
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"\x00hello".lstrip.should == "hello"
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"\000 \000hello\000 \000".lstrip.should == "hello\000 \000"
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end
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end
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end
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describe "String#lstrip!" do
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it "modifies self in place and returns self" do
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a = " hello "
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a.lstrip!.should equal(a)
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a.should == "hello "
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end
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it "returns nil if no modifications were made" do
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a = "hello"
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a.lstrip!.should == nil
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a.should == "hello"
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end
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it "makes a string empty if it is only whitespace" do
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"".lstrip!.should == nil
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" ".lstrip.should == ""
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" ".lstrip.should == ""
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end
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ruby_version_is '3.0' do
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it "removes leading NULL bytes and whitespace" do
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a = "\000 \000hello\000 \000"
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a.lstrip!
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a.should == "hello\000 \000"
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end
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end
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it "raises a FrozenError on a frozen instance that is modified" do
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-> { " hello ".freeze.lstrip! }.should raise_error(FrozenError)
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end
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# see [ruby-core:23657]
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it "raises a FrozenError on a frozen instance that would not be modified" do
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-> { "hello".freeze.lstrip! }.should raise_error(FrozenError)
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-> { "".freeze.lstrip! }.should raise_error(FrozenError)
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end
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it "raises an ArgumentError if the first non-space codepoint is invalid" do
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s = "\xDFabc".force_encoding(Encoding::UTF_8)
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s.valid_encoding?.should be_false
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-> { s.lstrip! }.should raise_error(ArgumentError)
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s = " \xDFabc".force_encoding(Encoding::UTF_8)
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s.valid_encoding?.should be_false
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-> { s.lstrip! }.should raise_error(ArgumentError)
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end
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end
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