test: ensure full branch coverage

---
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: passed
  - 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: kgryte

lib/node_modules/@stdlib/ndarray/base/dtype-resolve-enum/lib/main.js

@@ -50,7 +50,7 @@ function resolve( dtype ) {
 	if ( t === 'string' ) {
 		return str2enum( dtype );
 	}
-	if ( t === 'object' && isInteger( dtype.enum ) ) {
+	if ( t === 'object' && dtype && isInteger( dtype.enum ) ) {
 		return dtype.enum;
 	}
 	if ( isStructConstructorLike( dtype ) ) {

lib/node_modules/@stdlib/ndarray/base/dtype-resolve-enum/test/test.js

@@ -155,7 +155,10 @@ tape( 'the function returns `null` if unable to resolve an enumeration constant'
 		'bar',
 		-99999999,
 		-9999999999,
-		-9999999999999
+		-9999999999999,
+		null,
+		true,
+		false
 	];
 	for ( i = 0; i < values.length; i++ ) {
 		t.strictEqual( resolve( values[ i ] ), null, 'returns expected value' );