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Diffstat (limited to 'spec/ruby/core/kernel/Integer_spec.rb')
| -rw-r--r-- | spec/ruby/core/kernel/Integer_spec.rb | 697 |
1 files changed, 697 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/Integer_spec.rb b/spec/ruby/core/kernel/Integer_spec.rb new file mode 100644 index 0000000000..1e95fc9151 --- /dev/null +++ b/spec/ruby/core/kernel/Integer_spec.rb @@ -0,0 +1,697 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe :kernel_integer, shared: true do + it "returns a Bignum for a Bignum" do + Integer(2e100).should == 2e100 + end + + it "returns a Fixnum for a Fixnum" do + Integer(100).should == 100 + end + + it "uncritically return the value of to_int even if it is not an Integer" do + obj = mock("object") + obj.should_receive(:to_int).and_return("1") + obj.should_not_receive(:to_i) + Integer(obj).should == "1" + end + + it "raises a TypeError when passed nil" do + lambda { Integer(nil) }.should raise_error(TypeError) + end + + it "returns a Fixnum or Bignum object" do + Integer(2).should be_an_instance_of(Fixnum) + Integer(9**99).should be_an_instance_of(Bignum) + end + + it "truncates Floats" do + Integer(3.14).should == 3 + Integer(90.8).should == 90 + end + + it "calls to_i on Rationals" do + Integer(Rational(8,3)).should == 2 + Integer(3.quo(2)).should == 1 + end + + it "returns the value of to_int if the result is a Fixnum" do + obj = mock("object") + obj.should_receive(:to_int).and_return(1) + obj.should_not_receive(:to_i) + Integer(obj).should == 1 + end + + it "returns the value of to_int if the result is a Bignum" do + obj = mock("object") + obj.should_receive(:to_int).and_return(2e100) + obj.should_not_receive(:to_i) + Integer(obj).should == 2e100 + end + + it "calls to_i on an object whose to_int returns nil" do + obj = mock("object") + obj.should_receive(:to_int).and_return(nil) + obj.should_receive(:to_i).and_return(1) + Integer(obj).should == 1 + end + + it "raises a TypeError if to_i returns a value that is not an Integer" do + obj = mock("object") + obj.should_receive(:to_i).and_return("1") + lambda { Integer(obj) }.should raise_error(TypeError) + end + + it "raises a TypeError if no to_int or to_i methods exist" do + obj = mock("object") + lambda { Integer(obj) }.should raise_error(TypeError) + end + + it "raises a TypeError if to_int returns nil and no to_i exists" do + obj = mock("object") + obj.should_receive(:to_i).and_return(nil) + lambda { Integer(obj) }.should raise_error(TypeError) + end + + it "raises a FloatDomainError when passed NaN" do + lambda { Integer(nan_value) }.should raise_error(FloatDomainError) + end + + it "raises a FloatDomainError when passed Infinity" do + lambda { Integer(infinity_value) }.should raise_error(FloatDomainError) + end +end + +describe "Integer() given a String", shared: true do + it "raises an ArgumentError if the String is a null byte" do + lambda { Integer("\0") }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if the String starts with a null byte" do + lambda { Integer("\01") }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if the String ends with a null byte" do + lambda { Integer("1\0") }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if the String contains a null byte" do + lambda { Integer("1\01") }.should raise_error(ArgumentError) + end + + it "ignores leading whitespace" do + Integer(" 1").should == 1 + Integer(" 1").should == 1 + Integer("\t\n1").should == 1 + end + + it "ignores trailing whitespace" do + Integer("1 ").should == 1 + Integer("1 ").should == 1 + Integer("1\t\n").should == 1 + end + + it "raises an ArgumentError if there are leading _s" do + lambda { Integer("_1") }.should raise_error(ArgumentError) + lambda { Integer("___1") }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if there are trailing _s" do + lambda { Integer("1_") }.should raise_error(ArgumentError) + lambda { Integer("1___") }.should raise_error(ArgumentError) + end + + it "ignores an embedded _" do + Integer("1_1").should == 11 + end + + it "raises an ArgumentError if there are multiple embedded _s" do + lambda { Integer("1__1") }.should raise_error(ArgumentError) + lambda { Integer("1___1") }.should raise_error(ArgumentError) + end + + it "ignores a single leading +" do + Integer("+1").should == 1 + end + + it "raises an ArgumentError if there is a space between the + and number" do + lambda { Integer("+ 1") }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if there are multiple leading +s" do + lambda { Integer("++1") }.should raise_error(ArgumentError) + lambda { Integer("+++1") }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if there are trailing +s" do + lambda { Integer("1+") }.should raise_error(ArgumentError) + lambda { Integer("1+++") }.should raise_error(ArgumentError) + end + + it "makes the number negative if there's a leading -" do + Integer("-1").should == -1 + end + + it "raises an ArgumentError if there are multiple leading -s" do + lambda { Integer("--1") }.should raise_error(ArgumentError) + lambda { Integer("---1") }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if there are trailing -s" do + lambda { Integer("1-") }.should raise_error(ArgumentError) + lambda { Integer("1---") }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if there is a period" do + lambda { Integer("0.0") }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError for an empty String" do + lambda { Integer("") }.should raise_error(ArgumentError) + end + + it "parses the value as 0 if the string consists of a single zero character" do + Integer("0").should == 0 + end + + %w(x X).each do |x| + it "parses the value as a hex number if there's a leading 0#{x}" do + Integer("0#{x}1").should == 0x1 + Integer("0#{x}dd").should == 0xdd + end + + it "is a positive hex number if there's a leading +0#{x}" do + Integer("+0#{x}1").should == 0x1 + Integer("+0#{x}dd").should == 0xdd + end + + it "is a negative hex number if there's a leading -0#{x}" do + Integer("-0#{x}1").should == -0x1 + Integer("-0#{x}dd").should == -0xdd + end + + it "raises an ArgumentError if the number cannot be parsed as hex" do + lambda { Integer("0#{x}g") }.should raise_error(ArgumentError) + end + end + + %w(b B).each do |b| + it "parses the value as a binary number if there's a leading 0#{b}" do + Integer("0#{b}1").should == 0b1 + Integer("0#{b}10").should == 0b10 + end + + it "is a positive binary number if there's a leading +0#{b}" do + Integer("+0#{b}1").should == 0b1 + Integer("+0#{b}10").should == 0b10 + end + + it "is a negative binary number if there's a leading -0#{b}" do + Integer("-0#{b}1").should == -0b1 + Integer("-0#{b}10").should == -0b10 + end + + it "raises an ArgumentError if the number cannot be parsed as binary" do + lambda { Integer("0#{b}2") }.should raise_error(ArgumentError) + end + end + + ["o", "O", ""].each do |o| + it "parses the value as an octal number if there's a leading 0#{o}" do + Integer("0#{o}1").should == 0O1 + Integer("0#{o}10").should == 0O10 + end + + it "is a positive octal number if there's a leading +0#{o}" do + Integer("+0#{o}1").should == 0O1 + Integer("+0#{o}10").should == 0O10 + end + + it "is a negative octal number if there's a leading -0#{o}" do + Integer("-0#{o}1").should == -0O1 + Integer("-0#{o}10").should == -0O10 + end + + it "raises an ArgumentError if the number cannot be parsed as octal" do + lambda { Integer("0#{o}9") }.should raise_error(ArgumentError) + end + end + + %w(D d).each do |d| + it "parses the value as a decimal number if there's a leading 0#{d}" do + Integer("0#{d}1").should == 1 + Integer("0#{d}10").should == 10 + end + + it "is a positive decimal number if there's a leading +0#{d}" do + Integer("+0#{d}1").should == 1 + Integer("+0#{d}10").should == 10 + end + + it "is a negative decimal number if there's a leading -0#{d}" do + Integer("-0#{d}1").should == -1 + Integer("-0#{d}10").should == -10 + end + + it "raises an ArgumentError if the number cannot be parsed as decimal" do + lambda { Integer("0#{d}a") }.should raise_error(ArgumentError) + end + end +end + +describe "Integer() given a String and base", shared: true do + it "raises an ArgumentError if the String is a null byte" do + lambda { Integer("\0", 2) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if the String starts with a null byte" do + lambda { Integer("\01", 3) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if the String ends with a null byte" do + lambda { Integer("1\0", 4) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if the String contains a null byte" do + lambda { Integer("1\01", 5) }.should raise_error(ArgumentError) + end + + it "ignores leading whitespace" do + Integer(" 16", 16).should == 22 + Integer(" 16", 16).should == 22 + Integer("\t\n16", 16).should == 22 + end + + it "ignores trailing whitespace" do + Integer("16 ", 16).should == 22 + Integer("16 ", 16).should == 22 + Integer("16\t\n", 16).should == 22 + end + + it "raises an ArgumentError if there are leading _s" do + lambda { Integer("_1", 7) }.should raise_error(ArgumentError) + lambda { Integer("___1", 7) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if there are trailing _s" do + lambda { Integer("1_", 12) }.should raise_error(ArgumentError) + lambda { Integer("1___", 12) }.should raise_error(ArgumentError) + end + + it "ignores an embedded _" do + Integer("1_1", 4).should == 5 + end + + it "raises an ArgumentError if there are multiple embedded _s" do + lambda { Integer("1__1", 4) }.should raise_error(ArgumentError) + lambda { Integer("1___1", 4) }.should raise_error(ArgumentError) + end + + it "ignores a single leading +" do + Integer("+10", 3).should == 3 + end + + it "raises an ArgumentError if there is a space between the + and number" do + lambda { Integer("+ 1", 3) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if there are multiple leading +s" do + lambda { Integer("++1", 3) }.should raise_error(ArgumentError) + lambda { Integer("+++1", 3) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if there are trailing +s" do + lambda { Integer("1+", 3) }.should raise_error(ArgumentError) + lambda { Integer("1+++", 12) }.should raise_error(ArgumentError) + end + + it "makes the number negative if there's a leading -" do + Integer("-19", 20).should == -29 + end + + it "raises an ArgumentError if there are multiple leading -s" do + lambda { Integer("--1", 9) }.should raise_error(ArgumentError) + lambda { Integer("---1", 9) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if there are trailing -s" do + lambda { Integer("1-", 12) }.should raise_error(ArgumentError) + lambda { Integer("1---", 12) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError if there is a period" do + lambda { Integer("0.0", 3) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError for an empty String" do + lambda { Integer("", 12) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError for a base of 1" do + lambda { Integer("1", 1) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError for a base of 37" do + lambda { Integer("1", 37) }.should raise_error(ArgumentError) + end + + it "accepts wholly lowercase alphabetic strings for bases > 10" do + Integer('ab',12).should == 131 + Integer('af',20).should == 215 + Integer('ghj',30).should == 14929 + end + + it "accepts wholly uppercase alphabetic strings for bases > 10" do + Integer('AB',12).should == 131 + Integer('AF',20).should == 215 + Integer('GHJ',30).should == 14929 + end + + it "accepts mixed-case alphabetic strings for bases > 10" do + Integer('Ab',12).should == 131 + Integer('aF',20).should == 215 + Integer('GhJ',30).should == 14929 + end + + it "accepts alphanumeric strings for bases > 10" do + Integer('a3e',19).should == 3681 + Integer('12q',31).should == 1049 + Integer('c00o',29).should == 292692 + end + + it "raises an ArgumentError for letters invalid in the given base" do + lambda { Integer('z',19) }.should raise_error(ArgumentError) + lambda { Integer('c00o',2) }.should raise_error(ArgumentError) + end + + %w(x X).each do |x| + it "parses the value as a hex number if there's a leading 0#{x} and a base of 16" do + Integer("0#{x}10", 16).should == 16 + Integer("0#{x}dd", 16).should == 221 + end + + it "is a positive hex number if there's a leading +0#{x} and base of 16" do + Integer("+0#{x}1", 16).should == 0x1 + Integer("+0#{x}dd", 16).should == 0xdd + end + + it "is a negative hex number if there's a leading -0#{x} and a base of 16" do + Integer("-0#{x}1", 16).should == -0x1 + Integer("-0#{x}dd", 16).should == -0xdd + end + + 2.upto(15) do |base| + it "raises an ArgumentError if the number begins with 0#{x} and the base is #{base}" do + lambda { Integer("0#{x}1", base) }.should raise_error(ArgumentError) + end + end + + it "raises an ArgumentError if the number cannot be parsed as hex and the base is 16" do + lambda { Integer("0#{x}g", 16) }.should raise_error(ArgumentError) + end + end + + %w(b B).each do |b| + it "parses the value as a binary number if there's a leading 0#{b} and the base is 2" do + Integer("0#{b}1", 2).should == 0b1 + Integer("0#{b}10", 2).should == 0b10 + end + + it "is a positive binary number if there's a leading +0#{b} and a base of 2" do + Integer("+0#{b}1", 2).should == 0b1 + Integer("+0#{b}10", 2).should == 0b10 + end + + it "is a negative binary number if there's a leading -0#{b} and a base of 2" do + Integer("-0#{b}1", 2).should == -0b1 + Integer("-0#{b}10", 2).should == -0b10 + end + + it "raises an ArgumentError if the number cannot be parsed as binary and the base is 2" do + lambda { Integer("0#{b}2", 2) }.should raise_error(ArgumentError) + end + end + + ["o", "O"].each do |o| + it "parses the value as an octal number if there's a leading 0#{o} and a base of 8" do + Integer("0#{o}1", 8).should == 0O1 + Integer("0#{o}10", 8).should == 0O10 + end + + it "is a positive octal number if there's a leading +0#{o} and a base of 8" do + Integer("+0#{o}1", 8).should == 0O1 + Integer("+0#{o}10", 8).should == 0O10 + end + + it "is a negative octal number if there's a leading -0#{o} and a base of 8" do + Integer("-0#{o}1", 8).should == -0O1 + Integer("-0#{o}10", 8).should == -0O10 + end + + it "raises an ArgumentError if the number cannot be parsed as octal and the base is 8" do + lambda { Integer("0#{o}9", 8) }.should raise_error(ArgumentError) + end + + 2.upto(7) do |base| + it "raises an ArgumentError if the number begins with 0#{o} and the base is #{base}" do + lambda { Integer("0#{o}1", base) }.should raise_error(ArgumentError) + end + end + end + + %w(D d).each do |d| + it "parses the value as a decimal number if there's a leading 0#{d} and a base of 10" do + Integer("0#{d}1", 10).should == 1 + Integer("0#{d}10",10).should == 10 + end + + it "is a positive decimal number if there's a leading +0#{d} and a base of 10" do + Integer("+0#{d}1", 10).should == 1 + Integer("+0#{d}10", 10).should == 10 + end + + it "is a negative decimal number if there's a leading -0#{d} and a base of 10" do + Integer("-0#{d}1", 10).should == -1 + Integer("-0#{d}10", 10).should == -10 + end + + it "raises an ArgumentError if the number cannot be parsed as decimal and the base is 10" do + lambda { Integer("0#{d}a", 10) }.should raise_error(ArgumentError) + end + + 2.upto(9) do |base| + it "raises an ArgumentError if the number begins with 0#{d} and the base is #{base}" do + lambda { Integer("0#{d}1", base) }.should raise_error(ArgumentError) + end + end + + it "raises an ArgumentError if a base is given for a non-String value" do + lambda { Integer(98, 15) }.should raise_error(ArgumentError) + end + end +end + +describe :kernel_Integer, shared: true do + it "raises an ArgumentError when the String contains digits out of range of radix 2" do + str = "23456789abcdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 2) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 3" do + str = "3456789abcdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 3) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 4" do + str = "456789abcdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 4) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 5" do + str = "56789abcdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 5) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 6" do + str = "6789abcdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 6) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 7" do + str = "789abcdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 7) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 8" do + str = "89abcdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 8) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 9" do + str = "9abcdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 9) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 10" do + str = "abcdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 10) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 11" do + str = "bcdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 11) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 12" do + str = "cdefghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 12) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 13" do + str = "defghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 13) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 14" do + str = "efghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 14) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 15" do + str = "fghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 15) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 16" do + str = "ghijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 16) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 17" do + str = "hijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 17) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 18" do + str = "ijklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 18) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 19" do + str = "jklmnopqrstuvwxyz" + lambda { @object.send(@method, str, 19) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 20" do + str = "klmnopqrstuvwxyz" + lambda { @object.send(@method, str, 20) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 21" do + str = "lmnopqrstuvwxyz" + lambda { @object.send(@method, str, 21) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 22" do + str = "mnopqrstuvwxyz" + lambda { @object.send(@method, str, 22) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 23" do + str = "nopqrstuvwxyz" + lambda { @object.send(@method, str, 23) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 24" do + str = "opqrstuvwxyz" + lambda { @object.send(@method, str, 24) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 25" do + str = "pqrstuvwxyz" + lambda { @object.send(@method, str, 25) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 26" do + str = "qrstuvwxyz" + lambda { @object.send(@method, str, 26) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 27" do + str = "rstuvwxyz" + lambda { @object.send(@method, str, 27) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 28" do + str = "stuvwxyz" + lambda { @object.send(@method, str, 28) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 29" do + str = "tuvwxyz" + lambda { @object.send(@method, str, 29) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 30" do + str = "uvwxyz" + lambda { @object.send(@method, str, 30) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 31" do + str = "vwxyz" + lambda { @object.send(@method, str, 31) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 32" do + str = "wxyz" + lambda { @object.send(@method, str, 32) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 33" do + str = "xyz" + lambda { @object.send(@method, str, 33) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 34" do + str = "yz" + lambda { @object.send(@method, str, 34) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 35" do + str = "z" + lambda { @object.send(@method, str, 35) }.should raise_error(ArgumentError) + end + + it "raises an ArgumentError when the String contains digits out of range of radix 36" do + lambda { @object.send(@method, "{", 36) }.should raise_error(ArgumentError) + end +end + +describe "Kernel.Integer" do + it_behaves_like :kernel_Integer, :Integer_method, KernelSpecs + + # TODO: fix these specs + it_behaves_like :kernel_integer, :Integer, Kernel + it_behaves_like "Integer() given a String", :Integer + + it_behaves_like "Integer() given a String and base", :Integer + + it "is a public method" do + Kernel.Integer(10).should == 10 + end +end + +describe "Kernel#Integer" do + it_behaves_like :kernel_Integer, :Integer_function, KernelSpecs + + # TODO: fix these specs + it_behaves_like :kernel_integer, :Integer, Object.new + it_behaves_like "Integer() given a String", :Integer + + it_behaves_like "Integer() given a String and base", :Integer + + it "is a private method" do + Kernel.should have_private_instance_method(:Integer) + end +end |