testing: improve B.Loop test

This moves the B.Loop test from package testing_test to package
testing, where it can check on more of the internals of the benchmark
state.

Updates #61515.

Change-Id: Ia32d7104526125c5e8a1e35dab7660008afcbf80
Reviewed-on: https://go-review.googlesource.com/c/go/+/635897
Auto-Submit: Austin Clements <austin@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>

1 files changed, 0 insertions, 22 deletions

diff --git a/src/testing/benchmark_test.go b/src/testing/benchmark_test.go
index 239e730021..a195e4c576 100644
--- a/src/testing/benchmark_test.go
+++ b/src/testing/benchmark_test.go
@@ -127,28 +127,6 @@ func TestRunParallelSkipNow(t *testing.T) {
 	})
 }
 
-func TestBLoopHasResults(t *testing.T) {
-	// Verify that b.N and the b.Loop() iteration count match.
-	var nIterated int
-	bRet := testing.Benchmark(func(b *testing.B) {
-		i := 0
-		for b.Loop() {
-			i++
-		}
-		nIterated = i
-	})
-	if nIterated == 0 {
-		t.Fatalf("Iteration count zero")
-	}
-	if bRet.N != nIterated {
-		t.Fatalf("Benchmark result N incorrect, got %d want %d", bRet.N, nIterated)
-	}
-	// We only need to check duration to make sure benchmark result is written.
-	if bRet.T == 0 {
-		t.Fatalf("Benchmark result duration unset")
-	}
-}
-
 func ExampleB_RunParallel() {
 	// Parallel benchmark for text/template.Template.Execute on a single object.
 	testing.Benchmark(func(b *testing.B) {