. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
sigar "github.com/elastic/gosigar"
)
var _ = Describe("ConcreteSigar", func() {
var concreteSigar *sigar.ConcreteSigar
BeforeEach(func() {
concreteSigar = &sigar.ConcreteSigar{}
})
Describe("CollectCpuStats", func() {
It("immediately makes first CPU usage available even though it's not very accurate", func() {
samplesCh, stop := concreteSigar.CollectCpuStats(500 * time.Millisecond)
firstValue := <-samplesCh
Expect(firstValue.User).To(BeNumerically(">", 0))
stop <- struct{}{}
})
It("makes CPU usage delta values available", func() {
samplesCh, stop := concreteSigar.CollectCpuStats(500 * time.Millisecond)
firstValue := <-samplesCh
secondValue := <-samplesCh
Expect(secondValue.User).To(BeNumerically("<", firstValue.User))
