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math/rand: shorten Float32 test for GOARM=5

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Fixes #10749

Change-Id: I9d5f6f179fd117b0c358d7c8042daf5985b645c0
Reviewed-on: https://go-review.googlesource.com/10022
Reviewed-by: Dave Cheney <dave@cheney.net>
This commit is contained in:
Brad Fitzpatrick 2015-05-13 15:12:59 -07:00
parent f6d1009431
commit f8fbcefa6c
1 changed files with 11 additions and 2 deletions
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13
src/math/rand/rand_test.go
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@ -8,6 +8,8 @@ import (
"errors"
"fmt"
"math"
"os"
"runtime"
"testing"
)
@ -322,10 +324,17 @@ func TestExpTables(t *testing.T) {
}
}
// For issue 6721, the problem came after 7533753 calls, so check 10e6.
func TestFloat32(t *testing.T) {
// For issue 6721, the problem came after 7533753 calls, so check 10e6.
num := int(10e6)
// But ARM5 floating point emulation is slow (Issue 10749), so
// do less for that builder:
if testing.Short() && runtime.GOARCH == "arm" && os.Getenv("GOARM") == "5" {
num /= 100 // 1.72 seconds instead of 172 seconds
}
r := New(NewSource(1))
for ct := 0; ct < 10e6; ct++ {
for ct := 0; ct < num; ct++ {
f := r.Float32()
if f >= 1 {
t.Fatal("Float32() should be in range [0,1). ct:", ct, "f:", f)