test: add test for #104

Author: shellscape

test/fixtures/numeric.js

@@ -43,7 +43,8 @@ module.exports = {
     '0.5rad',
     '.5deg',
     '0.5deg',
-    '72.3deg'
+    '72.3deg',
+    '1.5dppx'
   ],
   throws: ['+-2.', '.', '.rem', '.2.3rem']
 };

test/snapshots/numeric.test.js.md

@@ -1613,3 +1613,42 @@ Generated by [AVA](https://ava.li).
         value: '72.3',
       },
     ]
+
+## 1.5dppx
+
+> Snapshot 1
+
+    '1.5dppx'
+
+> Snapshot 2
+
+    '1.5dppx'
+
+> Snapshot 3
+
+    [
+      Numeric {
+        raws: {
+          after: '',
+          before: '',
+        },
+        source: {
+          end: {
+            column: 1,
+            line: 1,
+          },
+          input: Input {
+            css: '1.5dppx',
+            hasBOM: false,
+            id: '<input css 35>',
+          },
+          start: {
+            column: 1,
+            line: 1,
+          },
+        },
+        type: 'numeric',
+        unit: 'dppx',
+        value: '1.5',
+      },
+    ]