convArtiToPromNumber use case (#150)

The regular expression `pattNumber` did not recognise the word `1000GB`.

collector/converter.go

@@ -21,7 +21,7 @@ func convArtiToPromBool(b bool) float64 {
 }
 
 const (
-	pattNumber = `^(?P<number>[[:digit:]]{1,3}(?:,[[:digit:]]{3})*(?:\.[[:digit:]]{1,2})?) ?(?P<multiplier>%|bytes|[KMGT]B)?$`
+	pattNumber = `^(?P<number>[[:digit:]]{1,4}(?:,[[:digit:]]{3})*(?:\.[[:digit:]]{1,2})?) ?(?P<multiplier>%|bytes|[KMGT]B)?$`
 )
 
 var (

collector/converter_test.go

@@ -64,6 +64,11 @@ func TestConvNum(t *testing.T) {
 			input: `100 %`,
 			want:  1.0,
 		},
+		{
+			// Detected during testing of https://github.com/peimanja/artifactory_exporter/pull/149
+			input: `1000GB`,
+			want:  1073741824000.0,
+		},
 	}
 	for _, tc := range tests {
 		got, err := fakeExporter.convArtiToPromNumber(tc.input)