move private test for sect_with_horizontal into unittests

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 <cmath>
 #include "SkCanvas.h"
 #include "SkGeometry.h"
@@ skipping 79 matching lines @@
     path->lineTo(3.747501373f, 2.724499941f);
     path->close();
 }
 
 static void make_path_crbug364224_simplified(SkPath* path) {
     path->moveTo(3.747501373f, 2.724499941f);
     path->cubicTo(3.648251295f, 0.5194999576f, 3.575501442f, 0.4999999702f, 3.497501373f, 0.4999999702f);
     path->close();
 }
 
+static void test_sect_with_horizontal_needs_pinning() {
+    // Test that sect_with_horizontal in SkLineClipper.cpp needs to pin after computing the
+    // intersection.
+    SkPath path;
+    path.reset();
+    path.moveTo(-540000, -720000);
+    path.lineTo(-9.10000017e-05f, 9.99999996e-13f);
+    path.lineTo(1, 1);
+
+    // Without the pinning code in sect_with_horizontal(), this would assert in the lineclipper
+    SkPaint paint;
+    SkSurface::MakeRasterN32Premul(10, 10)->getCanvas()->drawPath(path, paint);
+}
+
 static void test_path_crbug364224() {
     SkPath path;
     SkPaint paint;
     auto surface(SkSurface::MakeRasterN32Premul(84, 88));
     SkCanvas* canvas = surface->getCanvas();
 
     make_path_crbug364224_simplified(&path);
     canvas->drawPath(path, paint);
 
     make_path_crbug364224(&path);
@@ skipping 4111 matching lines @@
 
 DEF_TEST(PathInterp, reporter) {
     test_interp(reporter);
 }
 
 DEF_TEST(PathContains, reporter) {
     test_contains(reporter);
 }
 
 DEF_TEST(Paths, reporter) {
+    test_sect_with_horizontal_needs_pinning();
     test_crbug_629455(reporter);
     test_fuzz_crbug_627414(reporter);
     test_path_crbug364224();
 
     SkTSize<SkScalar>::Make(3,4);
 
     SkPath  p, empty;
     SkRect  bounds, bounds2;
     test_empty(reporter, p);
 
@@ skipping 137 matching lines @@
     PathTest_Private::TestPathTo(reporter);
     PathRefTest_Private::TestPathRef(reporter);
     PathTest_Private::TestPathrefListeners(reporter);
     test_dump(reporter);
     test_path_crbug389050(reporter);
     test_path_crbugskia2820(reporter);
     test_skbug_3469(reporter);
     test_skbug_3239(reporter);
     test_bounds_crbug_513799(reporter);
 }