fix: fix map test

test/number_test.cpp

@@ -63,34 +63,42 @@ TEST(NumberTest, ScaleFloatingPoint)
 TEST(NumberTest, MapIntegral)
 {
   EXPECT_EQ(ksn::map(5, 2, 4, 0, 1), 1) <<
-    "5 - 2 = 3\n"
+    "min(5, max(2, 4)) = 4\n"
+    "max(4, min(2, 4)) = 2\n"
+    "4 - 2 = 2\n"
     "4 - 2 = 2\n"
     "1 - 0 = 1\n"
-    "scale(3, 2, 1) = 1\n"
+    "scale(2, 2, 1) = 1\n"
     "1 + 0 = 1";
 
   EXPECT_EQ(ksn::map(0, -2, -4, 0, 1), -1) <<
-    "0 - (-2) = 2\n"
+    "min(0, max(-2, -4)) = -2\n"
+    "max(-2, min(-2, -4)) = -2\n"
+    "-2 - (-2) = 0\n"
     "-4 - (-2) = -2\n"
     "1 - 0 = 1\n"
-    "scale(2, -2, 1) = -1\n"
+    "scale(0, -2, 1) = -1\n"
     "-1 + 0 = -1";
 }
 
 TEST(NumberTest, MapFloatingPoint)
 {
   EXPECT_DOUBLE_EQ(ksn::map(0.5, 0.2, 0.8, 1.0, 3.2), 2.1) <<
-    "0.5 - 0.2 = 0.3\n"
+    "min(0.5, max(0.2, 0.8)) = 0.5\n"
+    "max(0.5, min(0.2, 0.8)) = 0.5\n"
+    "0.2 - 0.2 = 0.0\n"
     "0.8 - 0.2 = 0.6\n"
     "3.2 - 1.0 = 2.2\n"
-    "scale(0.3, 0.6, 2.2) = 1.1\n"
+    "scale(0.5, 0.6, 2.2) = 1.1\n"
     "1.1 + 1.0 = 2.1";
 
   EXPECT_DOUBLE_EQ(ksn::map(-0.1, 0.2, 0.8, -3.2, -1.0), -4.3) <<
-    "-0.1 - 0.2 = -0.3\n"
+    "min(-0.1, max(0.2, 0.8)) = 0.2\n"
+    "max(-0.1, min(0.2, 0.8)) = 0.2\n"
+    "0.2 - 0.2 = 0.0\n"
     "0.8 - 0.2 = 0.6\n"
     "-1.0 - (-3.2) = 2.2\n"
-    "scale(-0.3, 0.6, 2.2) = -1.1\n"
+    "scale(0.0, 0.6, 2.2) = -1.1\n"
     "-1.1 + (-3.2) = -4.3";
 }