ng test JavaScript heap out of memory in angular due to large mock data

Question

I am doing testing in angular 4 in my test cases i need large amount of data. I dynamically require the json which is needed in my spec files. These files are approximately 4 to 5 MB.

Here is some reference ...

  it('Multiple JSON:', () => {
    rdocList.forEach(element => {
      if (element.rdoc_id) {
        service.rdoc = require('../mock/' +
          element.rdoc_id +
          '.json');
        service.rdoc = new RDoc(service.rdoc);
        const storage = service.rdoc.descendants.filter({
          class_id: STORAGE_CLASS_IDS.ID
        });
        const clusterNode = storage[0].descendants.filter({
          class_id: STORAGE_CLASS_IDS.CLUSTERID
        });
        component.id = clusterNode[0].id;
        fixture.detectChanges();
      }
    });
  });

i have cleared the json in after each..

  afterEach(() => {
    service.rdoc = null;
    service = null;
  });

i get this issue

FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory

flowest · Accepted Answer · 2020-10-28 13:09:03Z

6

For me, instead of a simple ng test, this worked:
node --max_old_space_size=8192 node_modules/@angular/cli/bin/ng test
where 8192 is your disered memory to allocate

answered Oct 28, 2020 at 13:09

flowest

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Comments

BrayoKane · Accepted Answer · 2021-01-25 06:09:57Z

1

You can also first increase the memory usage of the node globally by running export NODE_OPTIONS=--max_old_space_size=8192 followed by the ng test command.

answered Jan 25, 2021 at 6:09

BrayoKane

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Comments

Raja Mohamed · Accepted Answer · 2017-11-16 11:05:37Z

0

Move to npm location in this path - C:\Users*UserName*\AppData\Roaming\npm

try to changing ng.cmd to this:

@IF EXIST "%~dp0\node.exe" (
   "%~dp0\node.exe" --max_old_space_size=8192 "%~dp0\..\@angular\cli\bin\ng" %*
) ELSE (
   @SETLOCAL
   @SET PATHEXT=%PATHEXT:;.JS;=;%
   node --max_old_space_size=8192 "%~dp0\..\@angular\cli\bin\ng" %*
)

change in ngc.cmd to:

@IF EXIST "%~dp0\node.exe" (
       "%~dp0\node.exe" --max_old_space_size=8192 "%~dp0\..\@angular\compiler-cli\src\main.js" %*
 ) ELSE (
       @SETLOCAL
       @SET PATHEXT=%PATHEXT:;.JS;=;%
       node --max_old_space_size=8192 "%~dp0\..\@angular\compiler-cli\src\main.js" %*
 )

answered Nov 16, 2017 at 11:05

Raja Mohamed

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1 Comment

Sujeetkumar Phadtare Over a year ago

I have done it still failed My system has 32 GB RAM. My question is how to manage GC while running testing

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