diff --git a/js/tests/veterinary_test.js b/js/tests/veterinary_test.js
new file mode 100644
index 00000000..aef3a17e
--- /dev/null
+++ b/js/tests/veterinary_test.js
@@ -0,0 +1,37 @@
+export const tests = []
+
+const testProperties = () => {
+  return (
+    Array.isArray(veterinary.animalKnowledge) &&
+    typeof veterinary.canTreat === 'function' &&
+    typeof veterinary.respondClient === 'function'
+  )
+}
+
+const testCanTreat = () => {
+  veterinary.animalKnowledge.push('dog', 'cat', 'elephant')
+  return (
+    veterinary.canTreat('dog') &&
+    veterinary.canTreat('cat') &&
+    veterinary.canTreat('elephant') &&
+    !veterinary.canTreat('') &&
+    !veterinary.canTreat('goldfish')
+  )
+}
+
+const testRespondClient = () => {
+  veterinary.animalKnowledge.push('parrot')
+  const vetResponse1 = veterinary.respondClient('Jack', 'parrot')
+  const vetResponse2 = veterinary.respondClient('Matias', 'cobra')
+
+  return (
+    vetResponse1.includes('Jack') &&
+    vetResponse1.toLowerCase().includes('yes') &&
+    vetResponse2.includes('Matias') &&
+    vetResponse2.toLowerCase().includes('no')
+  )
+}
+
+tests.push(testProperties, testCanTreat, testRespondClient)
+
+Object.freeze(tests)