omdb: strip non numeric from ImdbVotes

Closes #24

util/string_test.go

@@ -27,3 +27,36 @@ func TestStripNonAlphaNumeric(t *testing.T) {
 		})
 	}
 }
+
+func TestStripNonNumeric(t *testing.T) {
+	type args struct {
+		value string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "remove non numeric",
+			args: args{
+				value: "10, 560",
+			},
+			want: "10560",
+		},
+		{
+			name: "remove nothing",
+			args: args{
+				value: "100",
+			},
+			want: "100",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := StripNonNumeric(tt.args.value); got != tt.want {
+				t.Errorf("StripNonNumeric() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}