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401b64c4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
105 lines
3.1 KiB
Ruby
105 lines
3.1 KiB
Ruby
# -*- encoding: binary -*-
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require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "String#count" do
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it "counts occurrences of chars from the intersection of the specified sets" do
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s = "hello\nworld\x00\x00"
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s.count(s).should == s.size
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s.count("lo").should == 5
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s.count("eo").should == 3
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s.count("l").should == 3
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s.count("\n").should == 1
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s.count("\x00").should == 2
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s.count("").should == 0
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"".count("").should == 0
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s.count("l", "lo").should == s.count("l")
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s.count("l", "lo", "o").should == s.count("")
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s.count("helo", "hel", "h").should == s.count("h")
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s.count("helo", "", "x").should == 0
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end
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it "raises an ArgumentError when given no arguments" do
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lambda { "hell yeah".count }.should raise_error(ArgumentError)
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end
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it "negates sets starting with ^" do
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s = "^hello\nworld\x00\x00"
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s.count("^").should == 1 # no negation, counts ^
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s.count("^leh").should == 9
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s.count("^o").should == 12
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s.count("helo", "^el").should == s.count("ho")
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s.count("aeiou", "^e").should == s.count("aiou")
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"^_^".count("^^").should == 1
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"oa^_^o".count("a^").should == 3
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end
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it "counts all chars in a sequence" do
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s = "hel-[()]-lo012^"
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s.count("\x00-\xFF").should == s.size
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s.count("ej-m").should == 3
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s.count("e-h").should == 2
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# no sequences
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s.count("-").should == 2
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s.count("e-").should == s.count("e") + s.count("-")
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s.count("-h").should == s.count("h") + s.count("-")
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s.count("---").should == s.count("-")
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# see an ASCII table for reference
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s.count("--2").should == s.count("-./012")
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s.count("(--").should == s.count("()*+,-")
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s.count("A-a").should == s.count("A-Z[\\]^_`a")
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# negated sequences
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s.count("^e-h").should == s.size - s.count("e-h")
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s.count("^^-^").should == s.size - s.count("^")
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s.count("^---").should == s.size - s.count("-")
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"abcdefgh".count("a-ce-fh").should == 6
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"abcdefgh".count("he-fa-c").should == 6
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"abcdefgh".count("e-fha-c").should == 6
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"abcde".count("ac-e").should == 4
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"abcde".count("^ac-e").should == 1
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end
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it "raises if the given sequences are invalid" do
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s = "hel-[()]-lo012^"
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lambda { s.count("h-e") }.should raise_error(ArgumentError)
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lambda { s.count("^h-e") }.should raise_error(ArgumentError)
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end
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it 'returns the number of occurrences of a multi-byte character' do
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str = "\u{2605}"
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str.count(str).should == 1
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"asd#{str}zzz#{str}ggg".count(str).should == 2
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end
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it "calls #to_str to convert each set arg to a String" do
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other_string = mock('lo')
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other_string.should_receive(:to_str).and_return("lo")
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other_string2 = mock('o')
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other_string2.should_receive(:to_str).and_return("o")
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s = "hello world"
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s.count(other_string, other_string2).should == s.count("o")
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end
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it "raises a TypeError when a set arg can't be converted to a string" do
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lambda { "hello world".count(100) }.should raise_error(TypeError)
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lambda { "hello world".count([]) }.should raise_error(TypeError)
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lambda { "hello world".count(mock('x')) }.should raise_error(TypeError)
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end
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end
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