More progress... but more things I need to calculate that I don't yet know how.

test/humidity/absolute_test.clj

@@ -0,0 +1,13 @@
+(ns humidity.absolute-test
+  (:require [clojure.test :refer [deftest is testing]]
+            [humidity.constants :refer [celsius-offset]]
+            [humidity.absolute :refer [abs-humidity]]))
+
+(deftest absolute-humidity-test
+  (testing "definitional"
+    (let [min-expected 39.58
+          max-expected 39.59
+          actual (abs-humidity :relative-humidity 100
+                               :saturation-pressure 56.29
+                               :temperature-kelvin (+ 35 celsius-offset))]
+      (is (< min-expected actual max-expected)))))

test/humidity/dew_point_test.clj

@@ -0,0 +1 @@
+(ns humidity.dew-point-test)

test/humidity/relative_test.clj

@@ -0,0 +1,11 @@
+(ns humidity.relative-test
+  (:require [clojure.test :refer [deftest is testing]]
+            [humidity.constants :refer [celsius-offset]]
+            [humidity.relative :refer [rel-humidity]]))
+
+(deftest relative-humidity-test
+  (testing "Online examples"
+    (let [min-expected 99
+      max-expected 101
+      actual (rel-humidity :dew-point 35 :temperature-celsius 35)]
+    (is (< min-expected actual max-expected)))))

test/humidity/saturation_vp_test.clj

@@ -0,0 +1,10 @@
+(ns humidity.saturation-vp-test(:require [clojure.test :refer [deftest is testing]]
+  [humidity.constants :refer [celsius-offset]]
+          [humidity.saturation-vp :refer [saturation-vp saturation-vp-tetens]]))
+
+(deftest saturation-vp-test
+  (testing "from online sources"
+    (let [min-expected 5622
+      max-expected 5629
+      actual (saturation-vp {:temperature-celsius 35})]
+    (is (< min-expected actual max-expected)))))