31                     "Invalid test case, up to 2 roots allowed");  in testQuadRootsReal()
42                     "Invalid test case root %zu. Roots should be sorted in ascending order", i);  in testQuadRootsReal()
48         double roots[2] = {0, 0};  in testQuadRootsReal()  local
49         int rootCount = SkDQuad::RootsReal(A, B, C, roots);  in testQuadRootsReal()
51                         "Wrong number of roots returned %zu != %d", expectedRoots.size(),  in testQuadRootsReal()
54         // We don't care which order the roots are returned from the algorithm.  in testQuadRootsReal()
56         std::sort(std::begin(roots), std::begin(roots) + rootCount);  in testQuadRootsReal()
59                 REPORTER_ASSERT(reporter, sk_double_nearly_zero(roots[i]),  in testQuadRootsReal()
60                                 "0 != %.16f at index %d", roots[i], i);  in testQuadRootsReal()
63                                 sk_doubles_nearly_equal_ulps(expectedRoots[i], roots[i], 64),  in testQuadRootsReal()
64                                 "%.16f != %.16f at index %d", expectedRoots[i], roots[i], i);  in testQuadRootsReal()
70         double roots[2] = {0, 0};  in testQuadRootsReal()  local
71         int rootCount = SkQuads::RootsReal(A, B, C, roots);  in testQuadRootsReal()
73                         "Wrong number of roots returned %zu != %d", expectedRoots.size(),  in testQuadRootsReal()
76         // We don't care which order the roots are returned from the algorithm.  in testQuadRootsReal()
78         std::sort(std::begin(roots), std::begin(roots) + rootCount);  in testQuadRootsReal()
81                 REPORTER_ASSERT(reporter, sk_double_nearly_zero(roots[i]),  in testQuadRootsReal()
82                                 "0 != %.16f at index %d", roots[i], i);  in testQuadRootsReal()
85                                 sk_doubles_nearly_equal_ulps(expectedRoots[i], roots[i], 64),  in testQuadRootsReal()
86                                 "%.16f != %.16f at index %d", expectedRoots[i], roots[i], i);  in testQuadRootsReal()
95     testQuadRootsReal(reporter, "two roots 3x^2 - 20x - 40",  in DEF_TEST()
104     testQuadRootsReal(reporter, "two roots 2x^2 + 30x - 68",  in DEF_TEST()
108     testQuadRootsReal(reporter, "two roots x^2 - 5",  in DEF_TEST()
120     testQuadRootsReal(reporter, "no roots 5x^2 + 6x + 7",  in DEF_TEST()
124     testQuadRootsReal(reporter, "no roots 4x^2 + 1",  in DEF_TEST()
156                       // The roots are not in the range of doubles.  in DEF_TEST()
182     double roots[2];  in DEF_TEST()  local
184         SkQuads::RootsReal(DBL_MAX, 0, DBL_MAX, roots) == 0,  in DEF_TEST()
188         SkQuads::RootsReal(DBL_MAX, DBL_MAX, DBL_MAX, roots) == 0,  in DEF_TEST()
193         SkQuads::RootsReal(1, NAN, -3, roots) == 0,  in DEF_TEST()
197         SkQuads::RootsReal(0, NAN, 3, roots) == 0,  in DEF_TEST()
201         SkQuads::RootsReal(0, 0, NAN, roots) == 0,  in DEF_TEST()
227         auto [discriminant, r0, r1] = SkQuads::Roots(1, -0.5 * -2, 1);  in DEF_TEST()
234         auto [discriminant, r0, r1] = SkQuads::Roots(1, -0.5 * 4, 4);  in DEF_TEST()
240 // Test the roots using
242 // The roots are (F_(n–1) ± 1)/F_n if n is even otherwise there are no roots.
251         auto [discriminant, r0, r1] = SkQuads::Roots(F[0], F[1], F[2]);  in DEF_TEST()
254         // There are only real roots when i is even.  in DEF_TEST()
370         auto [discriminate, r0, r1] = SkQuads::Roots(A, -0.5*B, C);  in DEF_TEST()