lambda-powertools-typescript-layer.test.ts

import { Stack } from 'aws-cdk-lib';
import { Template } from 'aws-cdk-lib/assertions';
import { RuntimeFamily } from 'aws-cdk-lib/aws-lambda';
import { LambdaPowertoolsLayer } from '../src';


describe('with minimal configuration the construct', () => {
  const stack = new Stack();
  new LambdaPowertoolsLayer(stack, 'PowertoolsLayer', {
    runtimeFamily: RuntimeFamily.NODEJS,
  });
  const template = Template.fromStack(stack);
  test('synthesizes successfully', () => {
    template.hasResourceProperties('AWS::Lambda::LayerVersion', {
      Description: 'Lambda Powertools for TypeScript [x86_64] latest version',
    });
  });

  test('has license set to MIT-0', () => {
    template.hasResourceProperties('AWS::Lambda::LayerVersion', {
      LicenseInfo: 'MIT-0',
    });
  });

  test('matches the nodejs runtimes', () => {
    template.hasResourceProperties('AWS::Lambda::LayerVersion', {
      CompatibleRuntimes: [
        'nodejs12.x',
        'nodejs14.x',
        'nodejs16.x',
      ],
    });
  });
});

describe('for layerVersionName configuration the construct', () => {
  test('synthisizes to a layer with provided name', () => {
    const stack = new Stack();
    new LambdaPowertoolsLayer(stack, 'PowertoolsLayer', {
      layerVersionName: 'mySpecialName',
    });

    Template.fromStack(stack).hasResourceProperties('AWS::Lambda::LayerVersion', {
      LayerName: 'mySpecialName',
    });
  });
});

describe('with version configuration the construct', () => {
  test('synthesizes to a layer with specific valid version', () => {
    const stack = new Stack();
    const version = '0.9.0';
    new LambdaPowertoolsLayer(stack, 'PowertoolsLayer', {
      runtimeFamily: RuntimeFamily.NODEJS,
      version: version,
    });


    Template.fromStack(stack).hasResourceProperties('AWS::Lambda::LayerVersion', {
      Description: `Lambda Powertools for TypeScript [x86_64] version ${version}`,
    });
  });

  test('fails with invalid version', () => {
    const stack = new Stack();
    expect(() => new LambdaPowertoolsLayer(stack, 'PowertoolsLayerBadVersion', {
      runtimeFamily: RuntimeFamily.NODEJS,
      version: '12.222.21123',
    })).toThrow(/docker exited with status 1/);
  });


  test('returns  version with @ when provided provided', () => {
    const args = LambdaPowertoolsLayer.constructBuildArgs(RuntimeFamily.NODEJS, undefined, '0.9.0');

    expect(args).toEqual('@0.9.0');
  });

  test('returns empty when no version provided', () => {
    const args = LambdaPowertoolsLayer.constructBuildArgs(RuntimeFamily.NODEJS, undefined, undefined);

    expect(args).toEqual('');
  });

});