go-arbitrary/t_string_test.go

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2015-01-29 08:45:50 +00:00
package arbitrary
import "testing"
import "math/rand"
import "strings"
import "time"
func TestString(t *testing.T) {
src := rand.NewSource( time.Now().UTC().UnixNano() )
arb := New(src)
seen := make(map[string]int)
const limit = 50
for i:=0; i<limit; i++ {
s := arb.String()
if _,ok := seen[s] ; !ok {
seen[s] = 0
} else {
seen[s]++
}
}
if length := len(seen) ; length != limit {
t.Errorf("It is possible that there is nothing wrong with this test, but it just ran %d times and saw repeats such that only saw %d uniques.", limit, length)
}
}
func TestStringWithStringLength(t *testing.T) {
src := rand.NewSource( time.Now().UTC().UnixNano() )
string_length := 10 + rand.Intn(10)
arb := New(src)
seen := make(map[string]int)
const limit = 50
for i:=0; i<limit; i++ {
s := arb.String(string_length)
if s_length := len(s) ; s_length != string_length {
t.Errorf("Expected the length of the arbitrary string to be %d but it was actually %d. Arbitrary string was %q.", string_length, s_length, s)
}
if _,ok := seen[s] ; !ok {
seen[s] = 0
} else {
seen[s]++
}
}
if length := len(seen) ; length != limit {
t.Errorf("It is possible that there is nothing wrong with this test, but it just ran %d times and saw repeats such that only saw %d uniques.", limit, length)
}
}
func TestStringWithStringLengthAndStringToDrawFrom(t *testing.T) {
src := rand.NewSource( time.Now().UTC().UnixNano() )
string_length := 10 + rand.Intn(10)
draw_from := `!@#$%^&*()_+-={}[]|\:;"'<>,.?/`
arb := New(src)
seen := make(map[string]int)
const limit = 50
for i:=0; i<limit; i++ {
s := arb.String(string_length, draw_from)
if s_length := len(s) ; s_length != string_length {
t.Errorf("Expected the length of the arbitrary string to be %d but it was actually %d. Arbitrary string was %q.", string_length, s_length, s)
}
for ii,r := range []rune(s) {
if !strings.ContainsRune(draw_from, r) {
t.Errorf("Rune #%d from arbitrary string contained rune %q but was only suppose to contain runes from %q. Arbitrary string was %q.", ii, string(r), draw_from, s)
}
}
if _,ok := seen[s] ; !ok {
seen[s] = 0
} else {
seen[s]++
}
}
if length := len(seen) ; length != limit {
t.Errorf("It is possible that there is nothing wrong with this test, but it just ran %d times and saw repeats such that only saw %d uniques.", limit, length)
}
}
func TestStringWithStringLengthAndRunesToDrawFrom(t *testing.T) {
src := rand.NewSource( time.Now().UTC().UnixNano() )
string_length := 10 + rand.Intn(10)
draw_from := []rune(`!@#$%^&*()_+-={}[]|\:;"'<>,.?/`)
arb := New(src)
seen := make(map[string]int)
const limit = 50
for i:=0; i<limit; i++ {
s := arb.String(string_length, draw_from)
if s_length := len(s) ; s_length != string_length {
t.Errorf("Expected the length of the arbitrary string to be %d but it was actually %d. Arbitrary string was %q.", string_length, s_length, s)
}
for ii,r := range []rune(s) {
if !strings.ContainsRune(string(draw_from), r) {
t.Errorf("Rune #%d from arbitrary string contained rune %q but was only suppose to contain runes from %q. Arbitrary string was %q.", ii, string(r), string(draw_from), s)
}
}
if _,ok := seen[s] ; !ok {
seen[s] = 0
} else {
seen[s]++
}
}
if length := len(seen) ; length != limit {
t.Errorf("It is possible that there is nothing wrong with this test, but it just ran %d times and saw repeats such that only saw %d uniques.", limit, length)
}
}