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path: root/src/pkg/big/rat_test.go
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Diffstat (limited to 'src/pkg/big/rat_test.go')
-rw-r--r--src/pkg/big/rat_test.go219
1 files changed, 149 insertions, 70 deletions
diff --git a/src/pkg/big/rat_test.go b/src/pkg/big/rat_test.go
index 2379cc0d5..8f42949b0 100644
--- a/src/pkg/big/rat_test.go
+++ b/src/pkg/big/rat_test.go
@@ -7,57 +7,71 @@ package big
import "testing"
-type setStringTest struct {
+var setStringTests = []struct {
in, out string
ok bool
-}
-
-var setStringTests = []setStringTest{
- setStringTest{"0", "0", true},
- setStringTest{"-0", "0", true},
- setStringTest{"1", "1", true},
- setStringTest{"-1", "-1", true},
- setStringTest{in: "r", ok: false},
- setStringTest{in: "a/b", ok: false},
- setStringTest{in: "a.b", ok: false},
- setStringTest{"-0.1", "-1/10", true},
- setStringTest{"-.1", "-1/10", true},
- setStringTest{"2/4", "1/2", true},
- setStringTest{".25", "1/4", true},
- setStringTest{"-1/5", "-1/5", true},
- setStringTest{"884243222337379604041632732738665534", "884243222337379604041632732738665534", true},
- setStringTest{"53/70893980658822810696", "53/70893980658822810696", true},
- setStringTest{"106/141787961317645621392", "53/70893980658822810696", true},
- setStringTest{"204211327800791583.81095", "4084226556015831676219/20000", true},
+}{
+ {"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.String() != test.out {
- t.Errorf("#%d got %s want %s", i, x.String(), test.out)
+ if ok != test.ok || ok && x.RatString() != test.out {
+ t.Errorf("#%d got %s want %s", i, x.RatString(), test.out)
}
}
}
-type floatStringTest struct {
+var floatStringTests = []struct {
in string
prec int
out string
-}
-
-var floatStringTests = []floatStringTest{
- floatStringTest{"0", 0, "0"},
- floatStringTest{"0", 4, "0"},
- floatStringTest{"1", 0, "1"},
- floatStringTest{"1", 2, "1"},
- floatStringTest{"-1", 0, "-1"},
- floatStringTest{".25", 2, "0.25"},
- floatStringTest{".25", 1, "0.3"},
- floatStringTest{"-1/3", 3, "-0.333"},
- floatStringTest{"-2/3", 4, "-0.6667"},
+}{
+ {"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) {
@@ -71,21 +85,33 @@ func TestFloatString(t *testing.T) {
}
-type ratCmpTest struct {
- rat1, rat2 string
- out int
+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 = []ratCmpTest{
- ratCmpTest{"0", "0/1", 0},
- ratCmpTest{"1/1", "1", 0},
- ratCmpTest{"-1", "-2/2", 0},
- ratCmpTest{"1", "0", 1},
- ratCmpTest{"0/1", "1/1", -1},
- ratCmpTest{"-5/1434770811533343057144", "-5/1434770811533343057145", -1},
- ratCmpTest{"49832350382626108453/8964749413", "49832350382626108454/8964749413", -1},
- ratCmpTest{"-37414950961700930/7204075375675961", "37414950961700930/7204075375675961", -1},
- ratCmpTest{"37414950961700930/7204075375675961", "74829901923401860/14408150751351922", 0},
+
+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) {
@@ -101,6 +127,38 @@ func TestRatCmp(t *testing.T) {
}
+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
@@ -118,30 +176,28 @@ func testRatBin(t *testing.T, i int, name string, f ratBinFun, a ratBinArg) {
}
-type ratBinTest struct {
+var ratBinTests = []struct {
x, y string
sum, prod string
-}
-
-var ratBinTests = []ratBinTest{
- ratBinTest{"0", "0", "0", "0"},
- ratBinTest{"0", "1", "1", "0"},
- ratBinTest{"-1", "0", "-1", "0"},
- ratBinTest{"-1", "1", "0", "-1"},
- ratBinTest{"1", "1", "2", "1"},
- ratBinTest{"1/2", "1/2", "1", "1/4"},
- ratBinTest{"1/4", "1/3", "7/12", "1/12"},
- ratBinTest{"2/5", "-14/3", "-64/15", "-28/15"},
- ratBinTest{"4707/49292519774798173060", "-3367/70976135186689855734", "84058377121001851123459/1749296273614329067191168098769082663020", "-1760941/388732505247628681598037355282018369560"},
- ratBinTest{"-61204110018146728334/3", "-31052192278051565633/2", "-215564796870448153567/6", "950260896245257153059642991192710872711/3"},
- ratBinTest{"-854857841473707320655/4237645934602118692642972629634714039", "-18/31750379913563777419", "-27/133467566250814981", "15387441146526731771790/134546868362786310073779084329032722548987800600710485341"},
- ratBinTest{"618575745270541348005638912139/19198433543745179392300736", "-19948846211000086/637313996471", "27674141753240653/30123979153216", "-6169936206128396568797607742807090270137721977/6117715203873571641674006593837351328"},
- ratBinTest{"-3/26206484091896184128", "5/2848423294177090248", "15310893822118706237/9330894968229805033368778458685147968", "-5/24882386581946146755650075889827061248"},
- ratBinTest{"26946729/330400702820", "41563965/225583428284", "1238218672302860271/4658307703098666660055", "224002580204097/14906584649915733312176"},
- ratBinTest{"-8259900599013409474/7", "-84829337473700364773/56707961321161574960", "-468402123685491748914621885145127724451/396955729248131024720", "350340947706464153265156004876107029701/198477864624065512360"},
- ratBinTest{"575775209696864/1320203974639986246357", "29/712593081308", "410331716733912717985762465/940768218243776489278275419794956", "808/45524274987585732633"},
- ratBinTest{"1786597389946320496771/2066653520653241", "6269770/1992362624741777", "3559549865190272133656109052308126637/4117523232840525481453983149257", "8967230/3296219033"},
- ratBinTest{"-36459180403360509753/32150500941194292113930", "9381566963714/9633539", "301622077145533298008420642898530153/309723104686531919656937098270", "-3784609207827/3426986245"},
+}{
+ {"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) {
@@ -201,3 +257,26 @@ func TestIssue820(t *testing.T) {
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)
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-27 01:11:11 +0000