test: add nan checks

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
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    status: passed
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    status: passed
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    status: na
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    status: passed
---

Author: anandkaranubc

lib/node_modules/@stdlib/math/base/special/binomcoeff/test/test.js

@@ -42,6 +42,16 @@ tape( 'main export is a function', function test( t ) {
 	t.end();
 });
 
+tape( 'the function returns `NaN` if provided `NaN` for any parameter', function test( t ) {
+	var v = binomcoeff( 3, NaN );
+	t.strictEqual( isnanf( v ), true, 'returns expected value' );
+
+	v = binomcoeff( NaN, 2 );
+	t.strictEqual( isnanf( v ), true, 'returns expected value' );
+
+	t.end();
+});
+
 tape( 'the function evaluates the binomial coefficient for integers `n` and `k`', function test( t ) {
 	var expected;
 	var delta;