1 files changed, 57 insertions, 0 deletions
diff --git a/src/strconv/strconv_test.go b/src/strconv/strconv_test.go
new file mode 100644
index 000000000..9a007dde4
--- /dev/null
+++ b/src/strconv/strconv_test.go
@@ -0,0 +1,57 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package strconv_test
+
+import (
+	"runtime"
+	. "strconv"
+	"strings"
+	"testing"
+)
+
+var (
+	globalBuf [64]byte
+	nextToOne = "1.00000000000000011102230246251565404236316680908203125" + strings.Repeat("0", 10000) + "1"
+
+	mallocTest = []struct {
+		count int
+		desc  string
+		fn    func()
+	}{
+		{0, `AppendInt(localBuf[:0], 123, 10)`, func() {
+			var localBuf [64]byte
+			AppendInt(localBuf[:0], 123, 10)
+		}},
+		{0, `AppendInt(globalBuf[:0], 123, 10)`, func() { AppendInt(globalBuf[:0], 123, 10) }},
+		{0, `AppendFloat(localBuf[:0], 1.23, 'g', 5, 64)`, func() {
+			var localBuf [64]byte
+			AppendFloat(localBuf[:0], 1.23, 'g', 5, 64)
+		}},
+		{0, `AppendFloat(globalBuf[:0], 1.23, 'g', 5, 64)`, func() { AppendFloat(globalBuf[:0], 1.23, 'g', 5, 64) }},
+		{0, `ParseFloat("123.45", 64)`, func() { ParseFloat("123.45", 64) }},
+		{0, `ParseFloat("123.456789123456789", 64)`, func() { ParseFloat("123.456789123456789", 64) }},
+		{0, `ParseFloat("1.000000000000000111022302462515654042363166809082031251", 64)`, func() {
+			ParseFloat("1.000000000000000111022302462515654042363166809082031251", 64)
+		}},
+		{0, `ParseFloat("1.0000000000000001110223024625156540423631668090820312500...001", 64)`, func() {
+			ParseFloat(nextToOne, 64)
+		}},
+	}
+)
+
+func TestCountMallocs(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping malloc count in short mode")
+	}
+	if runtime.GOMAXPROCS(0) > 1 {
+		t.Skip("skipping; GOMAXPROCS>1")
+	}
+	for _, mt := range mallocTest {
+		allocs := testing.AllocsPerRun(100, mt.fn)
+		if max := float64(mt.count); allocs > max {
+			t.Errorf("%s: %v allocs, want <=%v", mt.desc, allocs, max)
+		}
+	}
+}