docs: update test.ts for assign and stride

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---

Author: Deepak91168

lib/node_modules/@stdlib/math/base/special/csignumf/docs/types/test.ts

@@ -1,4 +1,4 @@
-/*
+/**
 * @license Apache-2.0
 *
 * Copyright (c) 2025 The Stdlib Authors.
@@ -22,12 +22,12 @@ import csignumf = require( './index' );
 
 // TESTS //
 
-// The function returns an array of numbers...
+// The function returns a Complex64...
 {
 	csignumf( new Complex64( 1.0, 2.0 ) ); // $ExpectType Complex64
 }
 
-// The compiler throws an error if the function is provided a value other than a complex number...
+// The compiler throws an error if the function is provided a value other than a Complex64...
 {
 	csignumf( true ); // $ExpectError
 	csignumf( false ); // $ExpectError
@@ -43,3 +43,53 @@ import csignumf = require( './index' );
 {
 	csignumf(); // $ExpectError
 }
+
+// assign(): returns the same array type
+{
+	const out = new Float32Array( 2 );
+	csignumf.assign( 1.0, 2.0, out, 1, 0 ); // $ExpectType Float32Array
+}
+
+// assign(): accepts generic collections
+{
+	const out = [ 0.0, 0.0 ];
+	csignumf.assign( 1.0, 2.0, out, 1, 0 ); // $ExpectType number[]
+}
+
+// assign(): compiler errors for invalid args
+{
+	const out = new Float32Array( 2 );
+	csignumf.assign( '1', 2.0, out, 1, 0 ); // $ExpectError
+	csignumf.assign( 1.0, true, out, 1, 0 ); // $ExpectError
+	csignumf.assign( 1.0, 2.0, {}, 1, 0 ); // $ExpectError
+	csignumf.assign( 1.0, 2.0, out, '1', 0 ); // $ExpectError
+	csignumf.assign( 1.0, 2.0, out, 1, '0' ); // $ExpectError
+	csignumf.assign(); // $ExpectError
+}
+
+// strided(): returns the same array type as output
+{
+	const z = new Float32Array( [ 3.0, 4.0 ] );
+	const out = new Float32Array( 2 );
+	csignumf.strided( z, 2, 0, out, 2, 0 ); // $ExpectType Float32Array
+}
+
+// strided(): accepts generic collections
+{
+	const z = [ 3.0, 4.0 ];
+	const out = [ 0.0, 0.0 ];
+	csignumf.strided( z, 2, 0, out, 2, 0 ); // $ExpectType number[]
+}
+
+// strided(): compiler errors for invalid args
+{
+	const z = new Float32Array( 2 );
+	const out = new Float32Array( 2 );
+	csignumf.strided( 'z', 2, 0, out, 2, 0 ); // $ExpectError
+	csignumf.strided( z, true, 0, out, 2, 0 ); // $ExpectError
+	csignumf.strided( z, 2, {}, out, 2, 0 ); // $ExpectError
+	csignumf.strided( z, 2, 0, 42, 2, 0 ); // $ExpectError
+	csignumf.strided( z, 2, 0, out, '2', 0 ); // $ExpectError
+	csignumf.strided( z, 2, 0, out, 2, [] ); // $ExpectError
+	csignumf.strided(); // $ExpectError
+}