Revert "testing/quick: generate more map and slice states"

This reverts commit 0ccabe2e0b42a2602e0f37ce28d5368aa811f530.

Change-Id: Ib1c230fb6801c0ee26f4a352b0c1130fa240a76a
Reviewed-on: https://go-review.googlesource.com/22860
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/testing/quick/quick_test.go b/src/testing/quick/quick_test.go
index 018ece2a52..fe443592f8 100644
--- a/src/testing/quick/quick_test.go
+++ b/src/testing/quick/quick_test.go
@@ -290,3 +290,20 @@ func TestMutuallyRecursive(t *testing.T) {
 	f := func(a A) bool { return true }
 	Check(f, nil)
 }
+
+// Some serialization formats (e.g. encoding/pem) cannot distinguish
+// between a nil and an empty map or slice, so avoid generating the
+// zero value for these.
+func TestNonZeroSliceAndMap(t *testing.T) {
+	type Q struct {
+		M map[int]int
+		S []int
+	}
+	f := func(q Q) bool {
+		return q.M != nil && q.S != nil
+	}
+	err := Check(f, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+}