devstatscode/threads_test.go at master · cncf/devstatscode · GitHub

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package devstatscode

import (
"fmt"
"os"
"testing"

	lib "github.com/cncf/devstatscode"
)

funcTestGetThreadsNum(t*testing.T) {
// Environment context parse
varctx lib.Ctx
ctx.Init()
ctx.TestMode=true

// Get actual number of threads available
nThreads:=lib.GetThreadsNum(&ctx)

// Set context's ST/NCPUs manually (don't need to repeat tests from context_test.go)
vartestCases= []struct {
STbool
NCPUsint
expectedint
	}{
 {ST: false, NCPUs: 0, expected: nThreads},
 {ST: false, NCPUs: 1, expected: 1},
 {ST: false, NCPUs: -1, expected: nThreads},
 {ST: false, NCPUs: 2, expected: 2},
 {ST: true, NCPUs: 0, expected: 1},
 {ST: true, NCPUs: 1, expected: 1},
 {ST: true, NCPUs: -1, expected: 1},
 {ST: true, NCPUs: 2, expected: 2},
 {ST: true, NCPUs: nThreads+1, expected: nThreads},
	}
// Execute test cases
forindex, test:=rangetestCases {
ctx.ST=test.ST
ctx.NCPUs=test.NCPUs
expected:=test.expected
iftest.ST {
os.Setenv("GHA2DB_ST", "1")
 } else {
os.Unsetenv("GHA2DB_ST")
 }
iftest.NCPUs>0 {
os.Setenv("GHA2DB_NCPUS", fmt.Sprintf("%d", test.NCPUs))
 } else {
os.Unsetenv("GHA2DB_NCPUS")
 }
got:=lib.GetThreadsNum(&ctx)
ifgot!=expected {
t.Errorf(
"test number %d, expected to return %d threads, got %d (default is %d on this machine)",
index+1, expected, got, nThreads,
 )
 }
	}
}