test: add more tests

---
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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---

Author: anandkaranubc

lib/node_modules/@stdlib/math/base/special/gammainc/test/fixtures/cpp/large_x_large_s.json

@@ -361,6 +361,13 @@ int main( void ) {
 	rand_array_f64( s, len, 50.0, 100.0 );
 	generate( x, s, len, "large_x_medium_s.json" );
 
+	// Large x and large s:
+
+	// NOTE: The following fixture generation is commented out as its generation was handled manually to avoid the overflowing of the gamma function for large values of `x` and `s`. If you wish to generate this fixture, you can uncomment the following lines and need to ensure proper exception handling in the `generate` function to handle potential overflow errors.
+	// rand_array_f64( x, len, 100.0, 1000.0 );
+	// rand_array_f64( s, len, 100.0, 1000.0 );
+	// generate( x, s, len, "large_x_large_s.json" );
+
 	// Free allocated memory:
 	free( x );
 	free( s );