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97 lines
2.8 KiB
Ruby
97 lines
2.8 KiB
Ruby
require_relative '../../spec_helper'
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require 'strscan'
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describe "StringScanner#scan" do
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before :each do
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@s = StringScanner.new("This is a test")
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end
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it "returns the matched string" do
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@s.scan(/\w+/).should == "This"
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@s.scan(/.../).should == " is"
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@s.scan(//).should == ""
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@s.scan(/\s+/).should == " "
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end
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it "treats ^ as matching from the beginning of the current position" do
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@s.scan(/\w+/).should == "This"
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@s.scan(/^\d/).should be_nil
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@s.scan(/^\s/).should == " "
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end
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it "treats ^ as matching from the beginning of the current position when it's not the first character in the regexp" do
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@s.scan(/\w+/).should == "This"
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@s.scan(/( is not|^ is a)/).should == " is a"
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end
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it "treats \\A as matching from the beginning of the current position" do
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@s.scan(/\w+/).should == "This"
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@s.scan(/\A\d/).should be_nil
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@s.scan(/\A\s/).should == " "
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end
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it "treats \\A as matching from the beginning of the current position when it's not the first character in the regexp" do
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@s.scan(/\w+/).should == "This"
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@s.scan(/( is not|\A is a)/).should == " is a"
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end
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it "returns nil if there's no match" do
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@s.scan(/\d/).should == nil
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end
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it "returns nil when there is no more to scan" do
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@s.scan(/[\w\s]+/).should == "This is a test"
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@s.scan(/\w+/).should be_nil
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end
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it "returns an empty string when the pattern matches empty" do
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@s.scan(/.*/).should == "This is a test"
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@s.scan(/.*/).should == ""
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@s.scan(/./).should be_nil
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end
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ruby_version_is ""..."2.7" do
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it "raises a TypeError if pattern is a String" do
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-> { @s.scan("aoeu") }.should raise_error(TypeError)
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end
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end
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ruby_version_is "2.7" do
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it "treats String as the pattern itself" do
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@s.scan("this").should be_nil
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@s.scan("This").should == "This"
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end
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end
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it "raises a TypeError if pattern isn't a Regexp nor String" do
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-> { @s.scan(5) }.should raise_error(TypeError)
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-> { @s.scan(:test) }.should raise_error(TypeError)
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-> { @s.scan(mock('x')) }.should raise_error(TypeError)
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end
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end
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describe "StringScanner#scan with fixed_anchor: true" do
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before :each do
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@s = StringScanner.new("This\nis\na\ntest", fixed_anchor: true)
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end
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ruby_version_is "2.7" do
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it "returns the matched string" do
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@s.scan(/\w+/).should == "This"
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@s.scan(/.../m).should == "\nis"
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@s.scan(//).should == ""
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@s.scan(/\s+/).should == "\n"
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end
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it "treats ^ as matching from the beginning of line" do
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@s.scan(/\w+\n/).should == "This\n"
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@s.scan(/^\w/).should == "i"
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@s.scan(/^\w/).should be_nil
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end
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it "treats \\A as matching from the beginning of string" do
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@s.scan(/\A\w/).should == "T"
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@s.scan(/\A\w/).should be_nil
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end
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end
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end
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