fix the error that path is inversed for stroke and strokeAndFill styles

tests/EmptyPathTest.cpp

Index: tests/EmptyPathTest.cpp
diff --git a/tests/EmptyPathTest.cpp b/tests/EmptyPathTest.cpp
index c4f011a0dc65ae85b7c5421223d70ba8f2a909b6..4b14b2ade7423a710f709e46bd823a65b170547d 100644
--- a/tests/EmptyPathTest.cpp
+++ b/tests/EmptyPathTest.cpp
@@ -54,7 +54,7 @@ static void drawAndTest(skiatest::Reporter* reporter, const SkPath& path,
     }
 }
 
-static void iter_paint(skiatest::Reporter* reporter, const SkPath& path, bool shouldDraw) {
+static void iter_paint(skiatest::Reporter* reporter, const SkPath& path) {
     static const SkPaint::Cap gCaps[] = {
         SkPaint::kButt_Cap,
         SkPaint::kRound_Cap,
@@ -80,6 +80,8 @@ static void iter_paint(skiatest::Reporter* reporter, const SkPath& path, bool sh
                 paint.setStrokeJoin(gJoins[join]);
                 paint.setStyle(gStyles[style]);
 
+                bool shouldDraw = path.isInverseFillType() &&
+                                  SkPaint::kFill_Style == paint.getStyle();
                 paint.setAntiAlias(false);
                 drawAndTest(reporter, path, paint, shouldDraw);
                 paint.setAntiAlias(true);
@@ -101,7 +103,8 @@ static void make_Q(SkPath* path) { path->moveTo(CX, CY); path->quadTo(CX, CY, CX
 static void make_C(SkPath* path) { path->moveTo(CX, CY); path->cubicTo(CX, CY, CX, CY, CX, CY); }
 
 /*  Two invariants are tested: How does an empty/degenerate path draw?
- *  - if the path is drawn inverse, it should draw everywhere
+ *  - if the path is drawn inverse, it should draw everywhere for fill style,
+ *    but draw nowhere for other styles.
  *  - if the path is drawn non-inverse, it should draw nowhere
  *
  *  Things to iterate on:
@@ -129,8 +132,7 @@ static void test_emptydrawing(skiatest::Reporter* reporter) {
             }
             for (size_t fill = 0; fill < SK_ARRAY_COUNT(gFills); ++fill) {
                 path.setFillType(gFills[fill]);
-                bool shouldDraw = path.isInverseFillType();
-                iter_paint(reporter, path, shouldDraw);
+                iter_paint(reporter, path);
             }
         }
     }