1 files changed, 31 insertions, 0 deletions
diff --git a/src/strconv/ftoaryu_test.go b/src/strconv/ftoaryu_test.go
new file mode 100644
index 0000000..9758619
--- /dev/null
+++ b/src/strconv/ftoaryu_test.go
@@ -0,0 +1,31 @@
+// Copyright 2021 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 (
+	"math"
+	. "strconv"
+	"testing"
+)
+
+func TestMulByLog2Log10(t *testing.T) {
+	for x := -1600; x <= +1600; x++ {
+		iMath := MulByLog2Log10(x)
+		fMath := int(math.Floor(float64(x) * math.Ln2 / math.Ln10))
+		if iMath != fMath {
+			t.Errorf("mulByLog2Log10(%d) failed: %d vs %d\n", x, iMath, fMath)
+		}
+	}
+}
+
+func TestMulByLog10Log2(t *testing.T) {
+	for x := -500; x <= +500; x++ {
+		iMath := MulByLog10Log2(x)
+		fMath := int(math.Floor(float64(x) * math.Ln10 / math.Ln2))
+		if iMath != fMath {
+			t.Errorf("mulByLog10Log2(%d) failed: %d vs %d\n", x, iMath, fMath)
+		}
+	}
+}