Region Op Fuzzer

Also: assert Region IRects don't contain Sentinel value.
Also: Region fuzzer can't produce Sentinel value.

Change-Id: Ia33c7eeb9ef2c46b3da4a025d85de8a0406c3c0c
Reviewed-on: https://skia-review.googlesource.com/119011
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/fuzz/FuzzRegionOp.cpp b/fuzz/FuzzRegionOp.cpp
new file mode 100644
index 0000000000..7f8bbbefba
--- /dev/null
+++ b/fuzz/FuzzRegionOp.cpp
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Fuzz.h"
+#include "FuzzCommon.h"
+
+DEF_FUZZ(RegionOp, fuzz) {  // `fuzz -t api -n RegionOp`
+    SkRegion regionA, regionB, regionC;
+    fuzz_region(fuzz, &regionA, 2000);
+    fuzz_region(fuzz, &regionB, 2000);
+    SkRegion::Op op;
+    fuzz_enum_range(fuzz, &op, (SkRegion::Op)0, SkRegion::kLastOp);
+    regionC.op(regionA, regionB, op);
+}