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Viewing file:     test_benchmark_1x.txt (532 B)      -rw-r--r--

# Test that -benchtime 1x only runs a total of 1 loop iteration.
# See golang.org/issue/32051.

go test -run ^$ -bench . -benchtime 1x

-- go.mod --
module bench

go 1.16
-- x_test.go --
package bench

import (
	"fmt"
	"os"
	"testing"
)

var called = false

func TestMain(m *testing.M) {
	m.Run()
	if !called {
		fmt.Println("benchmark never called")
		os.Exit(1)
	}
}

func Benchmark(b *testing.B) {
	if b.N > 1 {
		b.Fatalf("called with b.N=%d; want b.N=1 only", b.N)
	}
	if called {
		b.Fatal("called twice")
	}
	called = true
}