1 files changed, 43 insertions, 0 deletions
diff --git a/test/unitsToRanges.js b/test/unitsToRanges.js
new file mode 100644
index 0000000..53d08aa
--- /dev/null
+++ b/test/unitsToRanges.js
@@ -0,0 +1,43 @@
+const test = require('tape')
+
+const unitsToRanges = require('../lib/unitsToRanges.js')
+
+test('units list to addr:flats', t => {
+  t.same(
+    unitsToRanges([]),
+    null,
+    'empty input returns empty output'
+  )
+
+  t.same(
+    unitsToRanges(['1'], 100),
+    '1',
+    'single unit'
+  )
+
+  t.same(
+    unitsToRanges(['1', '3']),
+    '1;3',
+    'two units without a range'
+  )
+
+  t.same(
+    unitsToRanges(['1', '2']),
+    '1-2',
+    'two consecutive units form a range'
+  )
+
+  t.same(
+    unitsToRanges(['1', '2', '3']),
+    '1-3',
+    'three consecutive units form a range'
+  )
+
+  t.same(
+    unitsToRanges(['1', '2', '4']),
+    '1-2;4',
+    'range and singular'
+  )
+
+  t.end()
+})