make unit not optional in parseVolumeSize

lib/do_volume/do_create.js

@@ -154,9 +154,7 @@ do_create.options = [
         helpArg: 'SIZE',
         help: 'The size of the volume to create, in the form ' +
             '`<integer><unit>`, e.g. `20G`. <integer> must be > 0. Supported ' +
-            'units are `G` or `g` for gibibytes and `M` or `m` for mebibytes.' +
-            ' If <unit> is not provided, <integer> is considered to be in ' +
-            'mebibytes.',
+            'units are `G` or `g` for gibibytes and `M` or `m` for mebibytes.',
         completionType: 'tritonvolumesize'
     },
     {

lib/volumes.js

@@ -20,11 +20,9 @@ function throwInvalidSize(size) {
  * Returns the number of MiBs (Mebibytes) represented by the string "size". That
  * string has the following format: <integer><unit>. The integer must be > 0.
  * Unit format suffixes are 'G' or 'g' for gibibytes and 'M' or 'm' for
- * mebibytes. If no unit suffix is provided, the unit is considered to be
  * mebibytes.
  *
  * Examples:
- *    - the string '100' represents 100 mebibytes
  *    - the strings '100m' and '100M' represent 100 mebibytes
  *    - the strings '100g' and '100G' represent 100 gibibytes
  *
@@ -42,11 +40,11 @@ function parseVolumeSize(size) {
         M: 1
     };
 
-    var multiplier = 1; /* default unit is mebibytes */
+    var multiplier;
     var multiplierSymbol;
     var baseValue;
 
-    var matches = size.match(/^([1-9]\d*)(g|m|G|M)?$/);
+    var matches = size.match(/^([1-9]\d*)(g|m|G|M)$/);
     if (!matches) {
         throwInvalidSize(size);
     }
@@ -57,7 +55,8 @@ function parseVolumeSize(size) {
     }
 
     baseValue = Number(matches[1]);
-    if (isNaN(baseValue)) {
+
+    if (isNaN(baseValue) || multiplier === undefined) {
         throwInvalidSize(size);
     }
 

test/unit/parseVolumeSize.test.js

@@ -63,7 +63,6 @@ test('parseVolumeSize', function (tt) {
 
     tt.test('parsing valid sizes', function (t) {
         var validVolumeSizes = [
-            {input: '42', expectedOutput: 42},
             {input: '42m', expectedOutput: 42},
             {input: '42M', expectedOutput: 42},
             {input: '42g', expectedOutput: 42 * 1024},