Adding unit tests to all possible mucus feeling/texture combinations

lib/sensiplan-mucus.js

@@ -0,0 +1,16 @@
+export default function (feeling, texture) {
+  const feelingMapping = {
+    0: 0,
+    1: 1,
+    2: 2,
+    3: 4
+  }
+  const textureMapping = {
+    0: 0,
+    1: 3,
+    2: 4
+  }
+  const nfpFeelingValue = feelingMapping[feeling]
+  const nfpTextureValue = textureMapping[texture]
+  return Math.max(nfpFeelingValue, nfpTextureValue)
+}