Teste de repository

Repository.php

// $query é um Eloquent\Builder
$query = parent::newQuery();

$query->with('relation')  // with() é um método de Eloquent\Builder
    ->join( // join() é método de Query\Builder
         'table2',
         'table1.user_id',
         'table2.another_user_id'
    )
    ->where('table2.another_user_id', $parametro); // where() está em ambos, Query\Builder e Eloquent\Builder

return $query->get(); //get() é método de Query\Builder

RepositoryTest.php

$repository = new Repository();
$filter = ['another_user_id' => 100];

$data = Collection::make([]); // Representa meus dados esperados de retorno

$queryBuilderMock = Mockery::mock(QueryBuilder::class, function (MockInterface $qb) use ($filter, $data) {
    $qb->shouldReceive('join')
        ->atLeast(1)
        ->with(Mockery::type('string'), Mockery::type('string'), Mockery::type('string'))
        ->andReturnSelf();
    $qb->shouldReceive('where')
        ->atLeast(1)
        ->with(Mockery::type('string'), $filter['tax_assistant_id'])
        ->andReturnSelf();
});

$builderMock = Mockery::mock(EloquentBuilder::class, function (MockInterface $eb) {
    $eb->shouldReceive('with')
        ->atLeast(1)
        ->with('Conversations')
        ->andReturnSelf();
});

$baseRepositoryMock = Mockery::mock(BaseRepository::class)
    ->shouldAllowMockingProtectedMethods();
$baseRepositoryMock->shouldReceive('newQuery')
    ->atLeast(1)
    ->andReturn($builderMock);

$this->assertEquals(1, $repository->listAll($filter)->count());