harden and speed up path op unit tests

tests/PathOpsLineParametetersTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
+#include "PathOpsTestCommon.h"
 #include "SkLineParameters.h"
 #include "Test.h"
 
 // tests to verify that distance calculations are coded correctly
 static const SkDCubic tests[] = {
     {{{0, 0}, {1, 1}, {2, 2}, {0, 3}}},
     {{{0, 0}, {1, 1}, {2, 2}, {3, 0}}},
     {{{0, 0}, {5, 0}, {-2, 4}, {3, 4}}},
     {{{0, 2}, {1, 0}, {2, 0}, {3, 0}}},
     {{{0, .2}, {1, 0}, {2, 0}, {3, 0}}},
@@ skipping 16 matching lines @@
     {1.333333333e-05, 6.666666667e-06},
     {1.5894571940104115e-07, 7.9472859700520577e-08},
 };
 
 static const size_t tests_count = SK_ARRAY_COUNT(tests);
 
 static void PathOpsLineParametersTest(skiatest::Reporter* reporter) {
     for (size_t index = 0; index < tests_count; ++index) {
         SkLineParameters lineParameters;
         const SkDCubic& cubic = tests[index];
+        SkASSERT(ValidCubic(cubic));
         lineParameters.cubicEndPoints(cubic, 0, 3);
         double denormalizedDistance[2];
         denormalizedDistance[0] = lineParameters.controlPtDistance(cubic, 1);
         denormalizedDistance[1] = lineParameters.controlPtDistance(cubic, 2);
         double normalSquared = lineParameters.normalSquared();
         size_t inner;
         for (inner = 0; inner < 2; ++inner) {
             double distSq = denormalizedDistance[inner];
             distSq *= distSq;
             double answersSq = answers[index][inner];
@@ skipping 18 matching lines @@
             SkDebugf("%s [%d,%d] normalizedDistance:%1.9g != answer:%g\n",
                     __FUNCTION__, static_cast<int>(index), (int)inner,
                     normalizedDistance[inner], answers[index][inner]);
             REPORTER_ASSERT(reporter, 0);
         }
     }
 }
 
 #include "TestClassDef.h"
 DEFINE_TESTCLASS_SHORT(PathOpsLineParametersTest)