test: use @stdlib/assert/contains for check

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: Planeshifter

lib/node_modules/@stdlib/_tools/eslint/rules/namespace-export-all/test/test.js

@@ -23,15 +23,16 @@
 var tape = require( 'tape' );
 var proxyquire = require( 'proxyquire' );
 var RuleTester = require( 'eslint' ).RuleTester;
+var contains = require( '@stdlib/assert/contains' );
 
 // Mock the rule with clean path resolution for testing:
 var rule = proxyquire( './../lib/main.js', {
 	'./resolve_package.js': function mockResolvePackage( dir, pkg ) {
 		// Mock path resolution to return clean stdlib package identifiers...
-		if ( dir.includes( 'error' ) ) {
+		if ( contains( dir, 'error' ) ) {
 			return '@stdlib/error/' + pkg;
 		}
-		if ( dir.includes( 'complex' ) ) {
+		if ( contains( dir, 'complex' ) ) {
 			return '@stdlib/complex/' + pkg;
 		}
 		// Default fallback