1 files changed, 21 insertions, 0 deletions
diff --git a/date-fns/src/yearsToMonths/test.ts b/date-fns/src/yearsToMonths/test.ts
new file mode 100644
index 0000000..e91231c
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+++ b/date-fns/src/yearsToMonths/test.ts
@@ -0,0 +1,21 @@
+/* eslint-env mocha */
+
+import assert from 'assert'
+import yearsToMonths from '.'
+
+describe('yearsToMonths', function () {
+  it('converts years to months', function () {
+    assert(yearsToMonths(1) === 12)
+    assert(yearsToMonths(2) === 24)
+  })
+
+  it('uses floor rounding', () => {
+    assert(yearsToMonths(1.7) === 20)
+    assert(yearsToMonths(0.1) === 1)
+  })
+
+  it('handles border values', () => {
+    assert(yearsToMonths(1.5) === 18)
+    assert(yearsToMonths(0) === 0)
+  })
+})