19   EXPECT_NEAR(function.Solve(0), 0, epsilon);  in TEST()
20   EXPECT_NEAR(function.Solve(0.05), 0.01136, epsilon);  in TEST()
21   EXPECT_NEAR(function.Solve(0.1), 0.03978, epsilon);  in TEST()
22   EXPECT_NEAR(function.Solve(0.15), 0.079780, epsilon);  in TEST()
23   EXPECT_NEAR(function.Solve(0.2), 0.12803, epsilon);  in TEST()
24   EXPECT_NEAR(function.Solve(0.25), 0.18235, epsilon);  in TEST()
25   EXPECT_NEAR(function.Solve(0.3), 0.24115, epsilon);  in TEST()
26   EXPECT_NEAR(function.Solve(0.35), 0.30323, epsilon);  in TEST()
27   EXPECT_NEAR(function.Solve(0.4), 0.36761, epsilon);  in TEST()
28   EXPECT_NEAR(function.Solve(0.45), 0.43345, epsilon);  in TEST()
29   EXPECT_NEAR(function.Solve(0.5), 0.5, epsilon);  in TEST()
30   EXPECT_NEAR(function.Solve(0.6), 0.63238, epsilon);  in TEST()
31   EXPECT_NEAR(function.Solve(0.65), 0.69676, epsilon);  in TEST()
32   EXPECT_NEAR(function.Solve(0.7), 0.75884, epsilon);  in TEST()
33   EXPECT_NEAR(function.Solve(0.75), 0.81764, epsilon);  in TEST()
34   EXPECT_NEAR(function.Solve(0.8), 0.87196, epsilon);  in TEST()
35   EXPECT_NEAR(function.Solve(0.85), 0.92021, epsilon);  in TEST()
36   EXPECT_NEAR(function.Solve(0.9), 0.96021, epsilon);  in TEST()
37   EXPECT_NEAR(function.Solve(0.95), 0.98863, epsilon);  in TEST()
38   EXPECT_NEAR(function.Solve(1), 1, epsilon);  in TEST()
41   EXPECT_EQ(0.875, basic_use.Solve(0.5));  in TEST()
44   EXPECT_EQ(1.625, overshoot.Solve(0.5));  in TEST()
47   EXPECT_EQ(-0.625, undershoot.Solve(0.5));  in TEST()
56   EXPECT_NEAR(function.Solve(0.0), 0.0, epsilon);  in TEST()
57   EXPECT_NEAR(function.Solve(0.05), -0.08954, epsilon);  in TEST()
58   EXPECT_NEAR(function.Solve(0.1), -0.15613, epsilon);  in TEST()
59   EXPECT_NEAR(function.Solve(0.15), -0.19641, epsilon);  in TEST()
60   EXPECT_NEAR(function.Solve(0.2), -0.20651, epsilon);  in TEST()
61   EXPECT_NEAR(function.Solve(0.25), -0.18232, epsilon);  in TEST()
62   EXPECT_NEAR(function.Solve(0.3), -0.11992, epsilon);  in TEST()
63   EXPECT_NEAR(function.Solve(0.35), -0.01672, epsilon);  in TEST()
64   EXPECT_NEAR(function.Solve(0.4), 0.12660, epsilon);  in TEST()
65   EXPECT_NEAR(function.Solve(0.45), 0.30349, epsilon);  in TEST()
66   EXPECT_NEAR(function.Solve(0.5), 0.50000, epsilon);  in TEST()
67   EXPECT_NEAR(function.Solve(0.55), 0.69651, epsilon);  in TEST()
68   EXPECT_NEAR(function.Solve(0.6), 0.87340, epsilon);  in TEST()
69   EXPECT_NEAR(function.Solve(0.65), 1.01672, epsilon);  in TEST()
70   EXPECT_NEAR(function.Solve(0.7), 1.11992, epsilon);  in TEST()
71   EXPECT_NEAR(function.Solve(0.75), 1.18232, epsilon);  in TEST()
72   EXPECT_NEAR(function.Solve(0.8), 1.20651, epsilon);  in TEST()
73   EXPECT_NEAR(function.Solve(0.85), 1.19641, epsilon);  in TEST()
74   EXPECT_NEAR(function.Solve(0.9), 1.15613, epsilon);  in TEST()
75   EXPECT_NEAR(function.Solve(0.95), 1.08954, epsilon);  in TEST()
76   EXPECT_NEAR(function.Solve(1.0), 1.0, epsilon);  in TEST()
169   EXPECT_EQ(-2.0, simple.Solve(-1.0));  in TEST()
170   EXPECT_EQ(1.0, simple.Solve(2.0));  in TEST()
173   EXPECT_EQ(0.0, at_edge_of_range.Solve(0.0));  in TEST()
174   EXPECT_EQ(1.0, at_edge_of_range.Solve(1.0));  in TEST()
181   EXPECT_EQ(-1.0, coincident_endpoints.Solve(-1.0));  in TEST()
182   EXPECT_EQ(2.0, coincident_endpoints.Solve(2.0));  in TEST()
185   EXPECT_EQ(0.0, vertical_gradient.Solve(-1.0));  in TEST()
186   EXPECT_EQ(1.0, vertical_gradient.Solve(2.0));  in TEST()
189   EXPECT_EQ(-2.0, distinct_endpoints.Solve(-1.0));  in TEST()
190   EXPECT_EQ(2.0, distinct_endpoints.Solve(2.0));  in TEST()
193   EXPECT_EQ(-1.0, coincident_endpoint.Solve(-1.0));  in TEST()
194   EXPECT_EQ(2.0, coincident_endpoint.Solve(2.0));  in TEST()
197   EXPECT_EQ(0, three_coincident_points.Solve(-1.0));  in TEST()
198   EXPECT_EQ(2.0, three_coincident_points.Solve(2.0));  in TEST()