add double precision convex test

tests/PathTest.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkParse.h"
@@ skipping 1058 matching lines @@
     stroke_tiny_cubic();
 }
 
 static void check_convexity(skiatest::Reporter* reporter, const SkPath& path,
                             SkPath::Convexity expected) {
     SkPath copy(path); // we make a copy so that we don't cache the result on the passed in path.
     SkPath::Convexity c = copy.getConvexity();
     REPORTER_ASSERT(reporter, c == expected);
 }
 
+static void test_path_crbug389050(skiatest::Reporter* reporter) {
+    SkPath  tinyConvexPolygon;
+    tinyConvexPolygon.moveTo(600.131559f, 800.112512f);
+    tinyConvexPolygon.lineTo(600.161735f, 800.118627f);
+    tinyConvexPolygon.lineTo(600.148962f, 800.142338f);
+    tinyConvexPolygon.lineTo(600.134891f, 800.137724f);
+    tinyConvexPolygon.close();
+    tinyConvexPolygon.getConvexity();
+    check_convexity(reporter, tinyConvexPolygon, SkPath::kConvex_Convexity);
+    check_direction(reporter, tinyConvexPolygon, SkPath::kCW_Direction);
+
+    SkPath  platTriangle;
+    platTriangle.moveTo(0, 0);
+    platTriangle.lineTo(200, 0);
+    platTriangle.lineTo(100, 0.04f);
+    platTriangle.close();
+    platTriangle.getConvexity();
+    check_direction(reporter, platTriangle, SkPath::kCW_Direction);
+
+    platTriangle.reset();
+    platTriangle.moveTo(0, 0);
+    platTriangle.lineTo(200, 0);
+    platTriangle.lineTo(100, 0.03f);
+    platTriangle.close();
+    platTriangle.getConvexity();
+    check_direction(reporter, platTriangle, SkPath::kCW_Direction);
+}
+
 static void test_convexity2(skiatest::Reporter* reporter) {
     SkPath pt;
     pt.moveTo(0, 0);
     pt.close();
     check_convexity(reporter, pt, SkPath::kConvex_Convexity);
     check_direction(reporter, pt, SkPath::kUnknown_Direction);
 
     SkPath line;
     line.moveTo(12*SK_Scalar1, 20*SK_Scalar1);
     line.lineTo(-12*SK_Scalar1, -20*SK_Scalar1);
@@ skipping 2643 matching lines @@
     test_addPathMode(reporter, true, true);
     test_extendClosedPath(reporter);
     test_addEmptyPath(reporter, SkPath::kExtend_AddPathMode);
     test_addEmptyPath(reporter, SkPath::kAppend_AddPathMode);
     test_conicTo_special_case(reporter);
     test_get_point(reporter);
     test_contains(reporter);
     PathTest_Private::TestPathTo(reporter);
     PathRefTest_Private::TestPathRef(reporter);
     test_dump(reporter);
+    test_path_crbug389050(reporter);
     test_path_crbugskia2820(reporter);
     test_skbug_3469(reporter);
     test_skbug_3239(reporter);
 }