From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libgo/go/big/rat_test.go | 282 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 282 insertions(+) create mode 100644 libgo/go/big/rat_test.go (limited to 'libgo/go/big/rat_test.go') diff --git a/libgo/go/big/rat_test.go b/libgo/go/big/rat_test.go new file mode 100644 index 000000000..8f42949b0 --- /dev/null +++ b/libgo/go/big/rat_test.go @@ -0,0 +1,282 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package big + +import "testing" + + +var setStringTests = []struct { + in, out string + ok bool +}{ + {"0", "0", true}, + {"-0", "0", true}, + {"1", "1", true}, + {"-1", "-1", true}, + {"1.", "1", true}, + {"1e0", "1", true}, + {"1.e1", "10", true}, + {in: "1e", ok: false}, + {in: "1.e", ok: false}, + {in: "1e+14e-5", ok: false}, + {in: "1e4.5", ok: false}, + {in: "r", ok: false}, + {in: "a/b", ok: false}, + {in: "a.b", ok: false}, + {"-0.1", "-1/10", true}, + {"-.1", "-1/10", true}, + {"2/4", "1/2", true}, + {".25", "1/4", true}, + {"-1/5", "-1/5", true}, + {"8129567.7690E14", "812956776900000000000", true}, + {"78189e+4", "781890000", true}, + {"553019.8935e+8", "55301989350000", true}, + {"98765432109876543210987654321e-10", "98765432109876543210987654321/10000000000", true}, + {"9877861857500000E-7", "3951144743/4", true}, + {"2169378.417e-3", "2169378417/1000000", true}, + {"884243222337379604041632732738665534", "884243222337379604041632732738665534", true}, + {"53/70893980658822810696", "53/70893980658822810696", true}, + {"106/141787961317645621392", "53/70893980658822810696", true}, + {"204211327800791583.81095", "4084226556015831676219/20000", true}, +} + +func TestRatSetString(t *testing.T) { + for i, test := range setStringTests { + x, ok := new(Rat).SetString(test.in) + + if ok != test.ok || ok && x.RatString() != test.out { + t.Errorf("#%d got %s want %s", i, x.RatString(), test.out) + } + } +} + + +var floatStringTests = []struct { + in string + prec int + out string +}{ + {"0", 0, "0"}, + {"0", 4, "0"}, + {"1", 0, "1"}, + {"1", 2, "1"}, + {"-1", 0, "-1"}, + {".25", 2, "0.25"}, + {".25", 1, "0.3"}, + {"-1/3", 3, "-0.333"}, + {"-2/3", 4, "-0.6667"}, + {"0.96", 1, "1.0"}, + {"0.999", 2, "1.00"}, + {"0.9", 0, "1"}, + {".25", -1, "0"}, + {".55", -1, "1"}, +} + +func TestFloatString(t *testing.T) { + for i, test := range floatStringTests { + x, _ := new(Rat).SetString(test.in) + + if x.FloatString(test.prec) != test.out { + t.Errorf("#%d got %s want %s", i, x.FloatString(test.prec), test.out) + } + } +} + + +func TestRatSign(t *testing.T) { + zero := NewRat(0, 1) + for _, a := range setStringTests { + var x Rat + x.SetString(a.in) + s := x.Sign() + e := x.Cmp(zero) + if s != e { + t.Errorf("got %d; want %d for z = %v", s, e, &x) + } + } +} + + +var ratCmpTests = []struct { + rat1, rat2 string + out int +}{ + {"0", "0/1", 0}, + {"1/1", "1", 0}, + {"-1", "-2/2", 0}, + {"1", "0", 1}, + {"0/1", "1/1", -1}, + {"-5/1434770811533343057144", "-5/1434770811533343057145", -1}, + {"49832350382626108453/8964749413", "49832350382626108454/8964749413", -1}, + {"-37414950961700930/7204075375675961", "37414950961700930/7204075375675961", -1}, + {"37414950961700930/7204075375675961", "74829901923401860/14408150751351922", 0}, +} + +func TestRatCmp(t *testing.T) { + for i, test := range ratCmpTests { + x, _ := new(Rat).SetString(test.rat1) + y, _ := new(Rat).SetString(test.rat2) + + out := x.Cmp(y) + if out != test.out { + t.Errorf("#%d got out = %v; want %v", i, out, test.out) + } + } +} + + +func TestIsInt(t *testing.T) { + one := NewInt(1) + for _, a := range setStringTests { + var x Rat + x.SetString(a.in) + i := x.IsInt() + e := x.Denom().Cmp(one) == 0 + if i != e { + t.Errorf("got %v; want %v for z = %v", i, e, &x) + } + } +} + + +func TestRatAbs(t *testing.T) { + zero := NewRat(0, 1) + for _, a := range setStringTests { + var z Rat + z.SetString(a.in) + var e Rat + e.Set(&z) + if e.Cmp(zero) < 0 { + e.Sub(zero, &e) + } + z.Abs(&z) + if z.Cmp(&e) != 0 { + t.Errorf("got z = %v; want %v", &z, &e) + } + } +} + + +type ratBinFun func(z, x, y *Rat) *Rat +type ratBinArg struct { + x, y, z string +} + +func testRatBin(t *testing.T, i int, name string, f ratBinFun, a ratBinArg) { + x, _ := NewRat(0, 1).SetString(a.x) + y, _ := NewRat(0, 1).SetString(a.y) + z, _ := NewRat(0, 1).SetString(a.z) + out := f(NewRat(0, 1), x, y) + + if out.Cmp(z) != 0 { + t.Errorf("%s #%d got %s want %s", name, i, out, z) + } +} + + +var ratBinTests = []struct { + x, y string + sum, prod string +}{ + {"0", "0", "0", "0"}, + {"0", "1", "1", "0"}, + {"-1", "0", "-1", "0"}, + {"-1", "1", "0", "-1"}, + {"1", "1", "2", "1"}, + {"1/2", "1/2", "1", "1/4"}, + {"1/4", "1/3", "7/12", "1/12"}, + {"2/5", "-14/3", "-64/15", "-28/15"}, + {"4707/49292519774798173060", "-3367/70976135186689855734", "84058377121001851123459/1749296273614329067191168098769082663020", "-1760941/388732505247628681598037355282018369560"}, + {"-61204110018146728334/3", "-31052192278051565633/2", "-215564796870448153567/6", "950260896245257153059642991192710872711/3"}, + {"-854857841473707320655/4237645934602118692642972629634714039", "-18/31750379913563777419", "-27/133467566250814981", "15387441146526731771790/134546868362786310073779084329032722548987800600710485341"}, + {"618575745270541348005638912139/19198433543745179392300736", "-19948846211000086/637313996471", "27674141753240653/30123979153216", "-6169936206128396568797607742807090270137721977/6117715203873571641674006593837351328"}, + {"-3/26206484091896184128", "5/2848423294177090248", "15310893822118706237/9330894968229805033368778458685147968", "-5/24882386581946146755650075889827061248"}, + {"26946729/330400702820", "41563965/225583428284", "1238218672302860271/4658307703098666660055", "224002580204097/14906584649915733312176"}, + {"-8259900599013409474/7", "-84829337473700364773/56707961321161574960", "-468402123685491748914621885145127724451/396955729248131024720", "350340947706464153265156004876107029701/198477864624065512360"}, + {"575775209696864/1320203974639986246357", "29/712593081308", "410331716733912717985762465/940768218243776489278275419794956", "808/45524274987585732633"}, + {"1786597389946320496771/2066653520653241", "6269770/1992362624741777", "3559549865190272133656109052308126637/4117523232840525481453983149257", "8967230/3296219033"}, + {"-36459180403360509753/32150500941194292113930", "9381566963714/9633539", "301622077145533298008420642898530153/309723104686531919656937098270", "-3784609207827/3426986245"}, +} + +func TestRatBin(t *testing.T) { + for i, test := range ratBinTests { + arg := ratBinArg{test.x, test.y, test.sum} + testRatBin(t, i, "Add", (*Rat).Add, arg) + + arg = ratBinArg{test.y, test.x, test.sum} + testRatBin(t, i, "Add symmetric", (*Rat).Add, arg) + + arg = ratBinArg{test.sum, test.x, test.y} + testRatBin(t, i, "Sub", (*Rat).Sub, arg) + + arg = ratBinArg{test.sum, test.y, test.x} + testRatBin(t, i, "Sub symmetric", (*Rat).Sub, arg) + + arg = ratBinArg{test.x, test.y, test.prod} + testRatBin(t, i, "Mul", (*Rat).Mul, arg) + + arg = ratBinArg{test.y, test.x, test.prod} + testRatBin(t, i, "Mul symmetric", (*Rat).Mul, arg) + + if test.x != "0" { + arg = ratBinArg{test.prod, test.x, test.y} + testRatBin(t, i, "Quo", (*Rat).Quo, arg) + } + + if test.y != "0" { + arg = ratBinArg{test.prod, test.y, test.x} + testRatBin(t, i, "Quo symmetric", (*Rat).Quo, arg) + } + } +} + + +func TestIssue820(t *testing.T) { + x := NewRat(3, 1) + y := NewRat(2, 1) + z := y.Quo(x, y) + q := NewRat(3, 2) + if z.Cmp(q) != 0 { + t.Errorf("got %s want %s", z, q) + } + + y = NewRat(3, 1) + x = NewRat(2, 1) + z = y.Quo(x, y) + q = NewRat(2, 3) + if z.Cmp(q) != 0 { + t.Errorf("got %s want %s", z, q) + } + + x = NewRat(3, 1) + z = x.Quo(x, x) + q = NewRat(3, 3) + if z.Cmp(q) != 0 { + t.Errorf("got %s want %s", z, q) + } +} + + +var setFrac64Tests = []struct { + a, b int64 + out string +}{ + {0, 1, "0"}, + {0, -1, "0"}, + {1, 1, "1"}, + {-1, 1, "-1"}, + {1, -1, "-1"}, + {-1, -1, "1"}, + {-9223372036854775808, -9223372036854775808, "1"}, +} + +func TestRatSetFrac64Rat(t *testing.T) { + for i, test := range setFrac64Tests { + x := new(Rat).SetFrac64(test.a, test.b) + if x.RatString() != test.out { + t.Errorf("#%d got %s want %s", i, x.RatString(), test.out) + } + } +} -- cgit v1.2.3