ChefSpec unable to find cookbook

When I run my unit test case (written in ChefSpec) I get the following error:

Chef::Exceptions::CookbookNotFound: Cookbook azuredns not found. If you're loading azuredns from another cook book, make sure you configure the dependency in your metadata

Following are my spec file, recipe file and metadata file

azuredns/spec/get_azure_token_spec.rb

require 'chefspec'
require 'rest-client'

describe 'azuredns::get_azure_token' do
  let(:chef_run) do
    # Step into the provider
    runner = ChefSpec::SoloRunner.new(step_into: ['azuredns_token'])
    # Read test data from a json file
    file_path = File.expand_path('test_data.json', __dir__)
    file = File.open(file_path)
    contents = file.read
    node_attr = JSON.parse(contents)
    # Load test data into node object
    runner.node.consume_attributes(node_attr)
    runner.converge(described_recipe)
  end

  before(:each) do
    # Mock post method of RestClient
    allow(RestClient).to receive(:post)
      .and_return({ access_token: 'i-am-a-token' }.to_json)
  end

  it 'retrieves token' do
    expect(chef_run).to retrieve_azuredns_token('azure_token')
  end

  it 'varifies the expected value of azure_rest_token' do
    expect(chef_run.node['azure_rest_token']).to eq('Bearer i-am-a-token')
  end

  it 'does not retrieve token due to incorrect resource name' do
    expect(chef_run).to_not retrieve_azuredns_token('azure_token1')
  end

  it 'raises exception due to error in response' do
    # Mock post method of RestClient
    allow(RestClient).to receive(:post)
      .and_return({ error: 'invalid_grant' }.to_json)
    expect { chef_run }.to raise_error(Exception)
  end
end

azuredns/recipe/get_azure_token.rb

require 'rest_client'
require 'json'

cloud_name = node['workorder']['cloud']['ciName']
cloud = node['workorder']['services']['dns'][cloud_name]
dns_attributes = cloud['ciAttributes']

#  Establish connection and get a security token
token = azuredns_token 'azure_token' do
  tenant_id dns_attributes['tenant_id']
  client_id dns_attributes['client_id']
  client_secret dns_attributes['client_secret']
end

token.run_action(:retrieve)

azuredns/metadata.rb

name             'Azuredns'
maintainer       'Shaffan'
maintainer_email 'shaffan.chaudhry1@gmail.com'
license          'Apache License, Version 2.0'
description      'Installs/Configures Azure DNS'
version          '0.1.0'
depends          'azure'

Please help!