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string_spec.cr
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string_spec.cr
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require "spec"
describe "String" do
describe "[]" do
it "gets with positive index" do
c = "hello!"[1]
c.should be_a(Char)
c.should eq('e')
end
it "gets with negative index" do
"hello!"[-1].should eq('!')
end
it "gets with inclusive range" do
"hello!"[1..4].should eq("ello")
end
it "gets with inclusive range with negative indices" do
"hello!"[-5..-2].should eq("ello")
end
it "gets with exclusive range" do
"hello!"[1...4].should eq("ell")
end
it "gets with start and count" do
"hello"[1, 3].should eq("ell")
end
it "gets with exclusive range with unicode" do
"há日本語"[1..3].should eq("á日本")
end
it "gets when index is last and count is zero" do
"foo"[3, 0].should eq("")
end
it "gets when index is last and count is positive" do
"foo"[3, 10].should eq("")
end
it "gets when index is last and count is negative at last" do
expect_raises(ArgumentError) do
"foo"[3, -1]
end
end
it { "foo"[3..-10].should eq("") }
it "gets when index is last and count is negative at last with utf-8" do
expect_raises(ArgumentError) do
"há日本語"[5, -1]
end
end
it "gets when index is last and count is zero in utf-8" do
"há日本語"[5, 0].should eq("")
end
it "gets when index is last and count is positive in utf-8" do
"há日本語"[5, 10].should eq("")
end
it "raises IndexError if pointing after last char which is non-ASCII" do
expect_raises(IndexError) do
"ß"[1]
end
end
it "raises index out of bound on index out of range with range" do
expect_raises(IndexError) do
"foo"[4..1]
end
end
it "raises index out of bound on index out of range with range and utf-8" do
expect_raises(IndexError) do
"há日本語"[6..1]
end
end
it "gets with exclusive with start and count" do
"há日本語"[1, 3].should eq("á日本")
end
it "gets with exclusive with start and count to end" do
"há日本語"[1, 4].should eq("á日本語")
end
it "gets with start and count with negative start" do
"こんいちは"[-3, 2].should eq("いち")
end
it "raises if index out of bounds" do
expect_raises(IndexError) do
"foo"[4, 1]
end
end
it "raises if index out of bounds with utf-8" do
expect_raises(IndexError) do
"こんいちは"[6, 1]
end
end
it "raises if count is negative" do
expect_raises(ArgumentError) do
"foo"[1, -1]
end
end
it "raises if count is negative with utf-8" do
expect_raises(ArgumentError) do
"こんいちは"[3, -1]
end
end
it "gets with single char" do
";"[0..-2].should eq("")
end
it "raises on too negative left bound" do
expect_raises IndexError do
"foo"[-4..0]
end
end
describe "with a regex" do
it { "FooBar"[/o+/].should eq "oo" }
it { "FooBar"[/([A-Z])/, 1].should eq "F" }
it { "FooBar"[/x/]?.should be_nil }
it { "FooBar"[/x/, 1]?.should be_nil }
it { "FooBar"[/(x)/, 1]?.should be_nil }
it { "FooBar"[/o(o)/, 2]?.should be_nil }
it { "FooBar"[/o(?<this>o)/, "this"].should eq "o" }
it { "FooBar"[/(?<this>x)/, "that"]?.should be_nil }
end
it "gets with a string" do
"FooBar"["Bar"].should eq "Bar"
expect_raises(Exception, "Nil assertion failed") { "FooBar"["Baz"] }
"FooBar"["Bar"]?.should eq "Bar"
"FooBar"["Baz"]?.should be_nil
end
it "gets with a char" do
"foo/bar"['/'].should eq '/'
expect_raises(Exception, "Nil assertion failed") { "foo/bar"['-'] }
"foo/bar"['/']?.should eq '/'
"foo/bar"['-']?.should be_nil
end
it "gets with index and []?" do
"hello"[1]?.should eq('e')
"hello"[5]?.should be_nil
"hello"[-1]?.should eq('o')
"hello"[-6]?.should be_nil
end
it "returns nil with []? if pointing after last char which is non-ASCII" do
"ß"[1]?.should be_nil
end
end
describe "byte_slice" do
it "gets byte_slice" do
"hello".byte_slice(1, 3).should eq("ell")
end
it "gets byte_slice with negative count" do
expect_raises(ArgumentError) do
"hello".byte_slice(1, -10)
end
end
it "gets byte_slice with negative count at last" do
expect_raises(ArgumentError) do
"hello".byte_slice(5, -1)
end
end
it "gets byte_slice with start out of bounds" do
expect_raises(IndexError) do
"hello".byte_slice(10, 3)
end
end
it "gets byte_slice with large count" do
"hello".byte_slice(1, 10).should eq("ello")
end
it "gets byte_slice with negative index" do
"hello".byte_slice(-2, 3).should eq("lo")
end
end
describe "i" do
it { "1234".to_i.should eq(1234) }
it { " +1234 ".to_i.should eq(1234) }
it { " -1234 ".to_i.should eq(-1234) }
it { " +1234 ".to_i.should eq(1234) }
it { " -00001234".to_i.should eq(-1234) }
it { "1_234".to_i(underscore: true).should eq(1234) }
it { "1101".to_i(base: 2).should eq(13) }
it { "12ab".to_i(16).should eq(4779) }
it { "0x123abc".to_i(prefix: true).should eq(1194684) }
it { "0b1101".to_i(prefix: true).should eq(13) }
it { "0b001101".to_i(prefix: true).should eq(13) }
it { "0123".to_i(prefix: true).should eq(83) }
it { "123hello".to_i(strict: false).should eq(123) }
it { "99 red balloons".to_i(strict: false).should eq(99) }
it { " 99 red balloons".to_i(strict: false).should eq(99) }
it { expect_raises(ArgumentError) { "hello".to_i } }
it { expect_raises(ArgumentError) { "1__234".to_i } }
it { expect_raises(ArgumentError) { "1_234".to_i } }
it { expect_raises(ArgumentError) { " 1234 ".to_i(whitespace: false) } }
it { expect_raises(ArgumentError) { "0x123".to_i } }
it { expect_raises(ArgumentError) { "0b123".to_i } }
it { expect_raises(ArgumentError) { "000b123".to_i(prefix: true) } }
it { expect_raises(ArgumentError) { "000x123".to_i(prefix: true) } }
it { expect_raises(ArgumentError) { "123hello".to_i } }
it { "z".to_i(36).should eq(35) }
it { "Z".to_i(36).should eq(35) }
it { "0".to_i(62).should eq(0) }
it { "1".to_i(62).should eq(1) }
it { "a".to_i(62).should eq(10) }
it { "z".to_i(62).should eq(35) }
it { "A".to_i(62).should eq(36) }
it { "Z".to_i(62).should eq(61) }
it { "10".to_i(62).should eq(62) }
it { "1z".to_i(62).should eq(97) }
it { "ZZ".to_i(62).should eq(3843) }
describe "to_i8" do
it { "127".to_i8.should eq(127) }
it { "-128".to_i8.should eq(-128) }
it { expect_raises(ArgumentError) { "128".to_i8 } }
it { expect_raises(ArgumentError) { "-129".to_i8 } }
it { "127".to_i8?.should eq(127) }
it { "128".to_i8?.should be_nil }
it { "128".to_i8 { 0 }.should eq(0) }
it { expect_raises(ArgumentError) { "18446744073709551616".to_i8 } }
end
describe "to_u8" do
it { "255".to_u8.should eq(255) }
it { "0".to_u8.should eq(0) }
it { expect_raises(ArgumentError) { "256".to_u8 } }
it { expect_raises(ArgumentError) { "-1".to_u8 } }
it { "255".to_u8?.should eq(255) }
it { "256".to_u8?.should be_nil }
it { "256".to_u8 { 0 }.should eq(0) }
it { expect_raises(ArgumentError) { "18446744073709551616".to_u8 } }
end
describe "to_i16" do
it { "32767".to_i16.should eq(32767) }
it { "-32768".to_i16.should eq(-32768) }
it { expect_raises(ArgumentError) { "32768".to_i16 } }
it { expect_raises(ArgumentError) { "-32769".to_i16 } }
it { "32767".to_i16?.should eq(32767) }
it { "32768".to_i16?.should be_nil }
it { "32768".to_i16 { 0 }.should eq(0) }
it { expect_raises(ArgumentError) { "18446744073709551616".to_i16 } }
end
describe "to_u16" do
it { "65535".to_u16.should eq(65535) }
it { "0".to_u16.should eq(0) }
it { expect_raises(ArgumentError) { "65536".to_u16 } }
it { expect_raises(ArgumentError) { "-1".to_u16 } }
it { "65535".to_u16?.should eq(65535) }
it { "65536".to_u16?.should be_nil }
it { "65536".to_u16 { 0 }.should eq(0) }
it { expect_raises(ArgumentError) { "18446744073709551616".to_u16 } }
end
describe "to_i32" do
it { "2147483647".to_i32.should eq(2147483647) }
it { "-2147483648".to_i32.should eq(-2147483648) }
it { expect_raises(ArgumentError) { "2147483648".to_i32 } }
it { expect_raises(ArgumentError) { "-2147483649".to_i32 } }
it { "2147483647".to_i32?.should eq(2147483647) }
it { "2147483648".to_i32?.should be_nil }
it { "2147483648".to_i32 { 0 }.should eq(0) }
it { expect_raises(ArgumentError) { "18446744073709551616".to_i32 } }
end
describe "to_u32" do
it { "4294967295".to_u32.should eq(4294967295) }
it { "0".to_u32.should eq(0) }
it { expect_raises(ArgumentError) { "4294967296".to_u32 } }
it { expect_raises(ArgumentError) { "-1".to_u32 } }
it { "4294967295".to_u32?.should eq(4294967295) }
it { "4294967296".to_u32?.should be_nil }
it { "4294967296".to_u32 { 0 }.should eq(0) }
it { expect_raises(ArgumentError) { "18446744073709551616".to_u32 } }
end
describe "to_i64" do
it { "9223372036854775807".to_i64.should eq(9223372036854775807) }
it { "-9223372036854775808".to_i64.should eq(-9223372036854775808) }
it { expect_raises(ArgumentError) { "9223372036854775808".to_i64 } }
it { expect_raises(ArgumentError) { "-9223372036854775809".to_i64 } }
it { "9223372036854775807".to_i64?.should eq(9223372036854775807) }
it { "9223372036854775808".to_i64?.should be_nil }
it { "9223372036854775808".to_i64 { 0 }.should eq(0) }
it { expect_raises(ArgumentError) { "18446744073709551616".to_i64 } }
end
describe "to_u64" do
it { "18446744073709551615".to_u64.should eq(18446744073709551615) }
it { "0".to_u64.should eq(0) }
it { expect_raises(ArgumentError) { "18446744073709551616".to_u64 } }
it { expect_raises(ArgumentError) { "-1".to_u64 } }
it { "18446744073709551615".to_u64?.should eq(18446744073709551615) }
it { "18446744073709551616".to_u64?.should be_nil }
it { "18446744073709551616".to_u64 { 0 }.should eq(0) }
end
it { "1234".to_i32.should eq(1234) }
it { "1234123412341234".to_i64.should eq(1234123412341234_i64) }
it { "9223372036854775808".to_u64.should eq(9223372036854775808_u64) }
it { expect_raises(ArgumentError, "Invalid base 1") { "12ab".to_i(1) } }
it { expect_raises(ArgumentError, "Invalid base 37") { "12ab".to_i(37) } }
it { expect_raises(ArgumentError, "Invalid Int32") { "1Y2P0IJ32E8E7".to_i(36) } }
it { "1Y2P0IJ32E8E7".to_i64(36).should eq(9223372036854775807) }
end
it "does to_f" do
expect_raises(ArgumentError) { "".to_f }
"".to_f?.should be_nil
expect_raises(ArgumentError) { " ".to_f }
" ".to_f?.should be_nil
"0".to_f.should eq(0_f64)
"0.0".to_f.should eq(0_f64)
"+0.0".to_f.should eq(0_f64)
"-0.0".to_f.should eq(0_f64)
"1234.56".to_f.should eq(1234.56_f64)
"1234.56".to_f?.should eq(1234.56_f64)
"+1234.56".to_f?.should eq(1234.56_f64)
"-1234.56".to_f?.should eq(-1234.56_f64)
expect_raises(ArgumentError) { "foo".to_f }
"foo".to_f?.should be_nil
" 1234.56 ".to_f.should eq(1234.56_f64)
" 1234.56 ".to_f?.should eq(1234.56_f64)
expect_raises(ArgumentError) { " 1234.56 ".to_f(whitespace: false) }
" 1234.56 ".to_f?(whitespace: false).should be_nil
expect_raises(ArgumentError) { " 1234.56foo".to_f }
" 1234.56foo".to_f?.should be_nil
"123.45 x".to_f64(strict: false).should eq(123.45_f64)
expect_raises(ArgumentError) { "x1.2".to_f64 }
"x1.2".to_f64?.should be_nil
expect_raises(ArgumentError) { "x1.2".to_f64(strict: false) }
"x1.2".to_f64?(strict: false).should be_nil
end
it "does to_f32" do
expect_raises(ArgumentError) { "".to_f32 }
"".to_f32?.should be_nil
expect_raises(ArgumentError) { " ".to_f32 }
" ".to_f32?.should be_nil
"0".to_f32.should eq(0_f32)
"0.0".to_f32.should eq(0_f32)
"+0.0".to_f32.should eq(0_f32)
"-0.0".to_f32.should eq(0_f32)
"1234.56".to_f32.should eq(1234.56_f32)
"1234.56".to_f32?.should eq(1234.56_f32)
"+1234.56".to_f32?.should eq(1234.56_f32)
"-1234.56".to_f32?.should eq(-1234.56_f32)
expect_raises(ArgumentError) { "foo".to_f32 }
"foo".to_f32?.should be_nil
" 1234.56 ".to_f32.should eq(1234.56_f32)
" 1234.56 ".to_f32?.should eq(1234.56_f32)
expect_raises(ArgumentError) { " 1234.56 ".to_f32(whitespace: false) }
" 1234.56 ".to_f32?(whitespace: false).should be_nil
expect_raises(ArgumentError) { " 1234.56foo".to_f32 }
" 1234.56foo".to_f32?.should be_nil
"123.45 x".to_f32(strict: false).should eq(123.45_f32)
expect_raises(ArgumentError) { "x1.2".to_f32 }
"x1.2".to_f32?.should be_nil
expect_raises(ArgumentError) { "x1.2".to_f32(strict: false) }
"x1.2".to_f32?(strict: false).should be_nil
end
it "does to_f64" do
expect_raises(ArgumentError) { "".to_f64 }
"".to_f64?.should be_nil
expect_raises(ArgumentError) { " ".to_f64 }
" ".to_f64?.should be_nil
"0".to_f64.should eq(0_f64)
"0.0".to_f64.should eq(0_f64)
"+0.0".to_f64.should eq(0_f64)
"-0.0".to_f64.should eq(0_f64)
"1234.56".to_f64.should eq(1234.56_f64)
"1234.56".to_f64?.should eq(1234.56_f64)
"+1234.56".to_f?.should eq(1234.56_f64)
"-1234.56".to_f?.should eq(-1234.56_f64)
expect_raises(ArgumentError) { "foo".to_f64 }
"foo".to_f64?.should be_nil
" 1234.56 ".to_f64.should eq(1234.56_f64)
" 1234.56 ".to_f64?.should eq(1234.56_f64)
expect_raises(ArgumentError) { " 1234.56 ".to_f64(whitespace: false) }
" 1234.56 ".to_f64?(whitespace: false).should be_nil
expect_raises(ArgumentError) { " 1234.56foo".to_f64 }
" 1234.56foo".to_f64?.should be_nil
"123.45 x".to_f64(strict: false).should eq(123.45_f64)
expect_raises(ArgumentError) { "x1.2".to_f64 }
"x1.2".to_f64?.should be_nil
expect_raises(ArgumentError) { "x1.2".to_f64(strict: false) }
"x1.2".to_f64?(strict: false).should be_nil
end
it "compares strings: different size" do
"foo".should_not eq("fo")
end
it "compares strings: same object" do
f = "foo"
f.should eq(f)
end
it "compares strings: same size, same string" do
"foo".should eq("fo" + "o")
end
it "compares strings: same size, different string" do
"foo".should_not eq("bar")
end
it "interpolates string" do
foo = "<foo>"
bar = 123
"foo #{bar}".should eq("foo 123")
"foo #{bar}".should eq("foo 123")
"#{foo} bar".should eq("<foo> bar")
end
it "multiplies" do
str = "foo"
(str * 0).should eq("")
(str * 3).should eq("foofoofoo")
end
it "multiplies with size one" do
str = "f"
(str * 0).should eq("")
(str * 10).should eq("ffffffffff")
end
it "multiplies with negative size" do
expect_raises(ArgumentError, "Negative argument") do
"f" * -1
end
end
describe "downcase" do
it { "HELLO!".downcase.should eq("hello!") }
it { "HELLO MAN!".downcase.should eq("hello man!") }
it { "ÁÉÍÓÚĀ".downcase.should eq("áéíóúā") }
it { "AEIİOU".downcase(Unicode::CaseOptions::Turkic).should eq("aeıiou") }
it { "ÁEÍOÚ".downcase(Unicode::CaseOptions::ASCII).should eq("ÁeÍoÚ") }
it { "İ".downcase.should eq("i̇") }
it { "Baffle".downcase(Unicode::CaseOptions::Fold).should eq("baffle") }
it { "ff".downcase(Unicode::CaseOptions::Fold).should eq("ff") }
it { "tschüß".downcase(Unicode::CaseOptions::Fold).should eq("tschüss") }
it { "ΣίσυφοςfiÆ".downcase(Unicode::CaseOptions::Fold).should eq("σίσυφοσfiæ") }
end
describe "upcase" do
it { "hello!".upcase.should eq("HELLO!") }
it { "hello man!".upcase.should eq("HELLO MAN!") }
it { "áéíóúā".upcase.should eq("ÁÉÍÓÚĀ") }
it { "aeıiou".upcase(Unicode::CaseOptions::Turkic).should eq("AEIİOU") }
it { "áeíoú".upcase(Unicode::CaseOptions::ASCII).should eq("áEíOú") }
it { "aeiou".upcase(Unicode::CaseOptions::Turkic).should eq("AEİOU") }
it { "baffle".upcase.should eq("BAFFLE") }
it { "ff".upcase.should eq("FF") }
end
describe "capitalize" do
it { "HELLO!".capitalize.should eq("Hello!") }
it { "HELLO MAN!".capitalize.should eq("Hello man!") }
it { "".capitalize.should eq("") }
it { "fflİ".capitalize.should eq("FFLi̇") }
it { "iO".capitalize(Unicode::CaseOptions::Turkic).should eq("İo") }
end
describe "chomp" do
it { "hello\n".chomp.should eq("hello") }
it { "hello\r".chomp.should eq("hello") }
it { "hello\r\n".chomp.should eq("hello") }
it { "hello".chomp.should eq("hello") }
it { "hello".chomp.should eq("hello") }
it { "かたな\n".chomp.should eq("かたな") }
it { "かたな\r".chomp.should eq("かたな") }
it { "かたな\r\n".chomp.should eq("かたな") }
it { "hello\n\n".chomp.should eq("hello\n") }
it { "hello\r\n\n".chomp.should eq("hello\r\n") }
it { "hello\r\n".chomp('\n').should eq("hello") }
it { "hello".chomp('a').should eq("hello") }
it { "hello".chomp('o').should eq("hell") }
it { "かたな".chomp('な').should eq("かた") }
it { "hello".chomp("good").should eq("hello") }
it { "hello".chomp("llo").should eq("he") }
it { "かたな".chomp("たな").should eq("か") }
it { "hello\n\n\n\n".chomp("").should eq("hello\n\n\n\n") }
it { "hello\r\n".chomp("\n").should eq("hello") }
end
describe "rchop" do
it { "".rchop.should eq("") }
it { "foo".rchop.should eq("fo") }
it { "foo\n".rchop.should eq("foo") }
it { "foo\r".rchop.should eq("foo") }
it { "foo\r\n".rchop.should eq("foo\r") }
it { "\r\n".rchop.should eq("\r") }
it { "かたな".rchop.should eq("かた") }
it { "かたな\n".rchop.should eq("かたな") }
it { "かたな\r\n".rchop.should eq("かたな\r") }
it { "foo".rchop('o').should eq("fo") }
it { "foo".rchop('x').should eq("foo") }
it { "foobar".rchop("bar").should eq("foo") }
it { "foobar".rchop("baz").should eq("foobar") }
end
describe "lchomp" do
it { "".lchop.should eq("") }
it { "h".lchop.should eq("") }
it { "hello".lchop.should eq("ello") }
it { "かたな".lchop.should eq("たな") }
it { "hello".lchop('g').should eq("hello") }
it { "hello".lchop('h').should eq("ello") }
it { "かたな".lchop('か').should eq("たな") }
it { "hello".lchop("good").should eq("hello") }
it { "hello".lchop("hel").should eq("lo") }
it { "かたな".lchop("かた").should eq("な") }
it { "\n\n\n\nhello".lchop("").should eq("\n\n\n\nhello") }
end
describe "strip" do
it { " hello \n\t\f\v\r".strip.should eq("hello") }
it { "hello".strip.should eq("hello") }
it { "かたな \n\f\v".strip.should eq("かたな") }
it { " \n\t かたな \n\f\v".strip.should eq("かたな") }
it { " \n\t かたな".strip.should eq("かたな") }
it { "かたな".strip.should eq("かたな") }
it { "".strip.should eq("") }
it { "\n".strip.should eq("") }
it { "\n\t ".strip.should eq("") }
# TODO: add spec tags so this can be run with tag:slow
# it { (" " * 167772160).strip.should eq("") }
it { "".strip("xyz").should eq("") }
it { "foobar".strip("").should eq("foobar") }
it { "rrfoobarr".strip("r").should eq("fooba") }
it { "rfoobar".strip("x").should eq("rfoobar") }
it { "rrrfooba".strip("r").should eq("fooba") }
it { "foobarrr".strip("r").should eq("fooba") }
it { "rabfooabr".strip("bar").should eq("foo") }
it { "rabfooabr".strip("xyz").should eq("rabfooabr") }
it { "fooabr".strip("bar").should eq("foo") }
it { "rabfoo".strip("bar").should eq("foo") }
it { "rababr".strip("bar").should eq("") }
it { "aaabcdaaa".strip('a').should eq("bcd") }
it { "bcdaaa".strip('a').should eq("bcd") }
it { "aaabcd".strip('a').should eq("bcd") }
it { "ababcdaba".strip { |c| c == 'a' || c == 'b' }.should eq("cd") }
end
describe "rstrip" do
it { "".rstrip.should eq("") }
it { " hello ".rstrip.should eq(" hello") }
it { "hello".rstrip.should eq("hello") }
it { " かたな \n\f\v".rstrip.should eq(" かたな") }
it { "かたな".rstrip.should eq("かたな") }
it { "".rstrip("xyz").should eq("") }
it { "foobar".rstrip("").should eq("foobar") }
it { "foobarrrr".rstrip("r").should eq("fooba") }
it { "foobars".rstrip("r").should eq("foobars") }
it { "foobar".rstrip("rab").should eq("foo") }
it { "foobar".rstrip("foo").should eq("foobar") }
it { "bararbr".rstrip("bar").should eq("") }
it { "foobarrrr".rstrip('r').should eq("fooba") }
it { "foobar".rstrip('x').should eq("foobar") }
it { "foobar".rstrip { |c| c == 'a' || c == 'r' }.should eq("foob") }
end
describe "lstrip" do
it { " hello ".lstrip.should eq("hello ") }
it { "hello".lstrip.should eq("hello") }
it { " \n\v かたな ".lstrip.should eq("かたな ") }
it { " かたな".lstrip.should eq("かたな") }
it { "".lstrip("xyz").should eq("") }
it { "barfoo".lstrip("").should eq("barfoo") }
it { "bbbarfoo".lstrip("b").should eq("arfoo") }
it { "sbarfoo".lstrip("r").should eq("sbarfoo") }
it { "barfoo".lstrip("rab").should eq("foo") }
it { "barfoo".lstrip("foo").should eq("barfoo") }
it { "b".lstrip("bar").should eq("") }
it { "bbbbarfoo".lstrip('b').should eq("arfoo") }
it { "barfoo".lstrip('x').should eq("barfoo") }
it { "barfoo".lstrip { |c| c == 'a' || c == 'b' }.should eq("rfoo") }
end
describe "empty?" do
it { "a".empty?.should be_false }
it { "".empty?.should be_true }
end
describe "blank?" do
it { " \t\n".blank?.should be_true }
it { "\u{1680}\u{2029}".blank?.should be_true }
it { "hello".blank?.should be_false }
end
describe "index" do
describe "by char" do
it { "foo".index('o').should eq(1) }
it { "foo".index('g').should be_nil }
it { "bar".index('r').should eq(2) }
it { "日本語".index('本').should eq(1) }
it { "bar".index('あ').should be_nil }
it { "あいう_えお".index('_').should eq(3) }
describe "with offset" do
it { "foobarbaz".index('a', 5).should eq(7) }
it { "foobarbaz".index('a', -4).should eq(7) }
it { "foo".index('g', 1).should be_nil }
it { "foo".index('g', -20).should be_nil }
it { "日本語日本語".index('本', 2).should eq(4) }
end
end
describe "by string" do
it { "foo bar".index("o b").should eq(2) }
it { "foo".index("fg").should be_nil }
it { "foo".index("").should eq(0) }
it { "foo".index("foo").should eq(0) }
it { "日本語日本語".index("本語").should eq(1) }
describe "with offset" do
it { "foobarbaz".index("ba", 4).should eq(6) }
it { "foobarbaz".index("ba", -5).should eq(6) }
it { "foo".index("ba", 1).should be_nil }
it { "foo".index("ba", -20).should be_nil }
it { "foo".index("", 3).should eq(3) }
it { "foo".index("", 4).should be_nil }
it { "日本語日本語".index("本語", 2).should eq(4) }
end
end
describe "by regex" do
it { "string 12345".index(/\d+/).should eq(7) }
it { "12345".index(/\d/).should eq(0) }
it { "Hello, world!".index(/\d/).should be_nil }
it { "abcdef".index(/[def]/).should eq(3) }
it { "日本語日本語".index(/本語/).should eq(1) }
describe "with offset" do
it { "abcDef".index(/[A-Z]/).should eq(3) }
it { "foobarbaz".index(/ba/, -5).should eq(6) }
it { "Foo".index(/[A-Z]/, 1).should be_nil }
it { "foo".index(/o/, 2).should eq(2) }
it { "foo".index(//, 3).should eq(3) }
it { "foo".index(//, 4).should be_nil }
it { "日本語日本語".index(/本語/, 2).should eq(4) }
end
end
end
describe "rindex" do
describe "by char" do
it { "foobar".rindex('a').should eq(4) }
it { "foobar".rindex('g').should be_nil }
it { "日本語日本語".rindex('本').should eq(4) }
it { "あいう_えお".rindex('_').should eq(3) }
describe "with offset" do
it { "faobar".rindex('a', 3).should eq(1) }
it { "faobarbaz".rindex('a', -3).should eq(4) }
it { "日本語日本語".rindex('本', 3).should eq(1) }
end
end
describe "by string" do
it { "foo baro baz".rindex("o b").should eq(7) }
it { "foo baro baz".rindex("fg").should be_nil }
it { "日本語日本語".rindex("日本").should eq(3) }
describe "with offset" do
it { "foo baro baz".rindex("o b", 6).should eq(2) }
it { "foo".rindex("", 3).should eq(3) }
it { "foo".rindex("", 4).should eq(3) }
it { "日本語日本語".rindex("日本", 2).should eq(0) }
end
end
describe "by regex" do
it { "bbbb".rindex(/b/).should eq(3) }
it { "a43b53".rindex(/\d+/).should eq(4) }
it { "bbbb".rindex(/\d/).should be_nil }
describe "with offset" do
it { "bbbb".rindex(/b/, -3).should eq(2) }
it { "bbbb".rindex(/b/, -1235).should be_nil }
it { "日本語日本語".rindex(/日本/, 2).should eq(0) }
end
end
end
describe "partition" do
describe "by char" do
"hello".partition('h').should eq ({"", "h", "ello"})
"hello".partition('o').should eq ({"hell", "o", ""})
"hello".partition('l').should eq ({"he", "l", "lo"})
"hello".partition('x').should eq ({"hello", "", ""})
end
describe "by string" do
"hello".partition("h").should eq ({"", "h", "ello"})
"hello".partition("o").should eq ({"hell", "o", ""})
"hello".partition("l").should eq ({"he", "l", "lo"})
"hello".partition("ll").should eq ({"he", "ll", "o"})
"hello".partition("x").should eq ({"hello", "", ""})
end
describe "by regex" do
"hello".partition(/h/).should eq ({"", "h", "ello"})
"hello".partition(/o/).should eq ({"hell", "o", ""})
"hello".partition(/l/).should eq ({"he", "l", "lo"})
"hello".partition(/ll/).should eq ({"he", "ll", "o"})
"hello".partition(/.l/).should eq ({"h", "el", "lo"})
"hello".partition(/.h/).should eq ({"hello", "", ""})
"hello".partition(/h./).should eq ({"", "he", "llo"})
"hello".partition(/o./).should eq ({"hello", "", ""})
"hello".partition(/.o/).should eq ({"hel", "lo", ""})
"hello".partition(/x/).should eq ({"hello", "", ""})
end
end
describe "rpartition" do
describe "by char" do
"hello".rpartition('l').should eq ({"hel", "l", "o"})
"hello".rpartition('o').should eq ({"hell", "o", ""})
"hello".rpartition('h').should eq ({"", "h", "ello"})
end
describe "by string" do
"hello".rpartition("l").should eq ({"hel", "l", "o"})
"hello".rpartition("x").should eq ({"", "", "hello"})
"hello".rpartition("o").should eq ({"hell", "o", ""})
"hello".rpartition("h").should eq ({"", "h", "ello"})
"hello".rpartition("ll").should eq ({"he", "ll", "o"})
"hello".rpartition("lo").should eq ({"hel", "lo", ""})
"hello".rpartition("he").should eq ({"", "he", "llo"})
end
describe "by regex" do
"hello".rpartition(/.l/).should eq ({"he", "ll", "o"})
"hello".rpartition(/ll/).should eq ({"he", "ll", "o"})
"hello".rpartition(/.o/).should eq ({"hel", "lo", ""})
"hello".rpartition(/.e/).should eq ({"", "he", "llo"})
"hello".rpartition(/l./).should eq ({"hel", "lo", ""})
end
end
describe "byte_index" do
it { "foo".byte_index('o'.ord).should eq(1) }
it { "foo bar booz".byte_index('o'.ord, 3).should eq(9) }
it { "foo".byte_index('a'.ord).should be_nil }
it "gets byte index of string" do
"hello world".byte_index("he").should eq(0)
"hello world".byte_index("lo").should eq(3)
"hello world".byte_index("world", 7).should be_nil
"foo foo".byte_index("oo").should eq(1)
"foo foo".byte_index("oo", 2).should eq(5)
"こんにちは世界".byte_index("ちは").should eq(9)
end
end
describe "includes?" do
describe "by char" do
it { "foo".includes?('o').should be_true }
it { "foo".includes?('g').should be_false }
end
describe "by string" do
it { "foo bar".includes?("o b").should be_true }
it { "foo".includes?("fg").should be_false }
it { "foo".includes?("").should be_true }
end
end
describe "split" do
describe "by whitespace" do
it { " foo bar\n\t baz ".split.should eq(["foo", "bar", "baz"]) }
it { " foo bar\n\t baz ".split(1).should eq([" foo bar\n\t baz "]) }
it { " foo bar\n\t baz ".split(2).should eq(["foo", "bar\n\t baz "]) }
it { "日本語 \n\t 日本 \n\n 語".split.should eq(["日本語", "日本", "語"]) }
end
describe "by char" do
it { "".split(',').should eq([""]) }
it { "".split(',', remove_empty: true).should eq([] of String) }
it { "foo,bar,,baz,".split(',').should eq(["foo", "bar", "", "baz", ""]) }
it { "foo,bar,,baz,".split(',', remove_empty: true).should eq(["foo", "bar", "baz"]) }
it { "foo,bar,,baz".split(',').should eq(["foo", "bar", "", "baz"]) }
it { "foo,bar,,baz".split(',', remove_empty: true).should eq(["foo", "bar", "baz"]) }
it { "foo".split(',').should eq(["foo"]) }
it { "foo".split(' ').should eq(["foo"]) }
it { " foo".split(' ').should eq(["", "", "", "foo"]) }
it { "foo ".split(' ').should eq(["foo", "", "", ""]) }
it { " foo bar".split(' ').should eq(["", "", "", "foo", "", "bar"]) }
it { " foo bar\n\t baz ".split(' ').should eq(["", "", "", "foo", "", "", "bar\n\t", "", "baz", "", "", ""]) }
it { " foo bar\n\t baz ".split(" ").should eq(["", "", "", "foo", "", "", "bar\n\t", "", "baz", "", "", ""]) }
it { "foo,bar,baz,qux".split(',', 1).should eq(["foo,bar,baz,qux"]) }
it { "foo,bar,baz,qux".split(',', 3).should eq(["foo", "bar", "baz,qux"]) }
it { "foo,bar,baz,qux".split(',', 30).should eq(["foo", "bar", "baz", "qux"]) }
it { "foo bar baz qux".split(' ', 1).should eq(["foo bar baz qux"]) }
it { "foo bar baz qux".split(' ', 3).should eq(["foo", "bar", "baz qux"]) }
it { "foo bar baz qux".split(' ', 30).should eq(["foo", "bar", "baz", "qux"]) }
it { "a,b,".split(',', 3).should eq(["a", "b", ""]) }
it { "日本ん語日本ん語".split('ん').should eq(["日本", "語日本", "語"]) }
it { "=".split('=').should eq(["", ""]) }
it { "a=".split('=').should eq(["a", ""]) }
it { "=b".split('=').should eq(["", "b"]) }
it { "=".split('=', 2).should eq(["", ""]) }
it { "=".split('=', 2, remove_empty: true).should eq([] of String) }
end
describe "by string" do
it { "".split(",").should eq([""]) }
it { "".split(":-").should eq([""]) }
it { "".split(":-", remove_empty: true).should eq([] of String) }
it { "foo:-bar:-:-baz:-".split(":-").should eq(["foo", "bar", "", "baz", ""]) }
it { "foo:-bar:-:-baz:-".split(":-", remove_empty: true).should eq(["foo", "bar", "baz"]) }
it { "foo:-bar:-:-baz".split(":-").should eq(["foo", "bar", "", "baz"]) }
it { "foo".split(":-").should eq(["foo"]) }
it { "foo".split("").should eq(["f", "o", "o"]) }
it { "日本さん語日本さん語".split("さん").should eq(["日本", "語日本", "語"]) }
it { "foo,bar,baz,qux".split(",", 1).should eq(["foo,bar,baz,qux"]) }
it { "foo,bar,baz,qux".split(",", 3).should eq(["foo", "bar", "baz,qux"]) }
it { "foo,bar,baz,qux".split(",", 30).should eq(["foo", "bar", "baz", "qux"]) }
it { "a b c".split(" ", 2).should eq(["a", "b c"]) }
it { "=".split("=").should eq(["", ""]) }
it { "a=".split("=").should eq(["a", ""]) }
it { "=b".split("=").should eq(["", "b"]) }
it { "=".split("=", 2).should eq(["", ""]) }
it { "=".split("=", 2, remove_empty: true).should eq([] of String) }
end
describe "by regex" do
it { "".split(/\n\t/).should eq([""]) }
it { "".split(/\n\t/, remove_empty: true).should eq([] of String) }
it { "foo\n\tbar\n\t\n\tbaz".split(/\n\t/).should eq(["foo", "bar", "", "baz"]) }
it { "foo\n\tbar\n\t\n\tbaz".split(/\n\t/, remove_empty: true).should eq(["foo", "bar", "baz"]) }
it { "foo\n\tbar\n\t\n\tbaz".split(/(?:\n\t)+/).should eq(["foo", "bar", "baz"]) }
it { "foo,bar".split(/,/, 1).should eq(["foo,bar"]) }
it { "foo,bar,".split(/,/).should eq(["foo", "bar", ""]) }
it { "foo,bar,baz,qux".split(/,/, 1).should eq(["foo,bar,baz,qux"]) }
it { "foo,bar,baz,qux".split(/,/, 3).should eq(["foo", "bar", "baz,qux"]) }
it { "foo,bar,baz,qux".split(/,/, 30).should eq(["foo", "bar", "baz", "qux"]) }
it { "a b c".split(Regex.new(" "), 2).should eq(["a", "b c"]) }
it { "日本ん語日本ん語".split(/ん/).should eq(["日本", "語日本", "語"]) }
it { "九十九十九".split(/(?=十)/).should eq(["九", "十九", "十九"]) }
it { "hello world".split(/\b/).should eq(["hello", " ", "world", ""]) }
it { "hello world".split(/\w+|(?= )/).should eq(["", " ", ""]) }
it { "abc".split(//).should eq(["a", "b", "c"]) }
it { "hello".split(/\w+/).should eq(["", ""]) }
it { "foo".split(/o/).should eq(["f", "", ""]) }
it { "=".split(/\=/).should eq(["", ""]) }
it { "a=".split(/\=/).should eq(["a", ""]) }
it { "=b".split(/\=/).should eq(["", "b"]) }
it { "=".split(/\=/, 2).should eq(["", ""]) }
it { "=".split(/\=/, 2, remove_empty: true).should eq([] of String) }
it { ",".split(/(?:(x)|(,))/).should eq(["", ",", ""]) }
it "keeps groups" do
s = "split on the word on okay?"
s.split(/(on)/).should eq(["split ", "on", " the word ", "on", " okay?"])
end
end
end
describe "starts_with?" do
it { "foobar".starts_with?("foo").should be_true }
it { "foobar".starts_with?("").should be_true }
it { "foobar".starts_with?("foobarbaz").should be_false }
it { "foobar".starts_with?("foox").should be_false }
it { "foobar".starts_with?('f').should be_true }
it { "foobar".starts_with?('g').should be_false }
it { "よし".starts_with?('よ').should be_true }
it { "よし!".starts_with?("よし").should be_true }
end
describe "ends_with?" do
it { "foobar".ends_with?("bar").should be_true }
it { "foobar".ends_with?("").should be_true }
it { "foobar".ends_with?("foobarbaz").should be_false }
it { "foobar".ends_with?("xbar").should be_false }
it { "foobar".ends_with?('r').should be_true }
it { "foobar".ends_with?('x').should be_false }
it { "よし".ends_with?('し').should be_true }
it { "よし".ends_with?('な').should be_false }
it { "あいう_".ends_with?('_').should be_true }
end
describe "=~" do
it "matches with group" do
"foobar" =~ /(o+)ba(r?)/
$1.should eq("oo")
$2.should eq("r")
end
it "returns nil with string" do
("foo" =~ "foo").should be_nil
end
it "returns nil with regex and regex" do
(/foo/ =~ /foo/).should be_nil
end
end
describe "delete" do
it { "foobar".delete { |char| char == 'o' }.should eq("fbar") }
it { "hello world".delete("lo").should eq("he wrd") }
it { "hello world".delete("lo", "o").should eq("hell wrld") }
it { "hello world".delete("hello", "^l").should eq("ll wrld") }
it { "hello world".delete("ej-m").should eq("ho word") }
it { "hello^world".delete("\\^aeiou").should eq("hllwrld") }
it { "hello-world".delete("a\\-eo").should eq("hllwrld") }
it { "hello world\\r\\n".delete("\\").should eq("hello worldrn") }
it { "hello world\\r\\n".delete("\\A").should eq("hello world\\r\\n") }
it { "hello world\\r\\n".delete("X-\\w").should eq("hello orldrn") }
it "deletes one char" do
deleted = "foobar".delete('o')
deleted.bytesize.should eq(4)
deleted.should eq("fbar")
deleted = "foobar".delete('x')
deleted.bytesize.should eq(6)
deleted.should eq("foobar")
end
end
it "reverses string" do
reversed = "foobar".reverse
reversed.bytesize.should eq(6)
reversed.should eq("raboof")
end
it "reverses utf-8 string" do
reversed = "こんいちは".reverse
reversed.bytesize.should eq(15)
reversed.size.should eq(5)
reversed.should eq("はちいんこ")
end
it "reverses taking grapheme clusters into account" do
reversed = "noël".reverse
reversed.bytesize.should eq("noël".bytesize)