amDuration with moment object

[alobban]

Description of the Issue and Steps to Reproduce:

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YES
Please describe the issue and steps to reproduce, preferably with a code sample / plunker:
I tried piping a moment object with amDuration: 'seconds' based on the illustrations, I expect the string display to say '4 minutes' when the object is 4 minutes ahead of time.

I keep receiving 'a few seconds'

Ensure your issue is isolated to angular2-moment. Issues involving third party tools will be closed unless submitted by the tool's author/maintainer.

Environment:
Webstorm in Windows 10; angular2-moment 1.7.0
Please answer the following questions:

• Angular version? 4.3.4
• TypeScript version? 2.2.0
• moment version? 2.18.1
• Are you using moment-timezone? 0.5.13
• Are you using the angular-cli? 1.4.4
• Using Rollup/Webpack/System.js/Ionic/similar? Webpack

[louisl]

You are probably passing it a string "4" instead of numeric 4. That was my problem.

[StickNitro]

If you are passing amDuration a value in minutes then you need to tell amDuration that the value is minutes, e.g. 4 | amDuration:'minutes' will output 4 minutes, if you do intend to use seconds then you would be piping a value in seconds 240 | amDuration:'seconds' will output 4 minutes

[ben12]

Same issue.

My model contains a Duration instance. amDuration pipe does not work.

duration = moment.duration('P3M4D');

{{ duration | amLocale: 'fr' | amDuration: 'days' }}

display 'a few seconds', and it is not the good locale.

We can not display instance of moment.Duration with amDuration ? amDuration seems to be more a parser than a formatter.
So, how to do ?

[ben12]

Solution may be to accept no argument like this:

  transform(value: any, ...args: string[]): string {
    if (typeof args === 'undefined' || args.length !== 1) {
      // throw new Error('DurationPipe: missing required time unit argument');
      return moment.duration(value).humanize();
    }
    return moment.duration(value, args[0] as moment.unitOfTime.DurationConstructor).humanize();
  }

But it not solve amLocale problem. It seems to accept only date, but duration.locale('fr') is possible.