From fe127d2c2ead45145e7791f9a53d9232c740e553 Mon Sep 17 00:00:00 2001
From: Payal Goswami <payalgoswami9711@gmail.com>
Date: Fri, 2 Jan 2026 10:26:00 +0000
Subject: [PATCH] test(math/base/special/cosm1): add tests for signed zeros

---
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
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  - task: lint_typescript_tests
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---
---
 .../@stdlib/math/base/special/cosm1/test/test.js    | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/node_modules/@stdlib/math/base/special/cosm1/test/test.js b/lib/node_modules/@stdlib/math/base/special/cosm1/test/test.js
index 2ce201bc7a83..72b519368abb 100644
--- a/lib/node_modules/@stdlib/math/base/special/cosm1/test/test.js
+++ b/lib/node_modules/@stdlib/math/base/special/cosm1/test/test.js
@@ -51,6 +51,19 @@ tape( 'main export is a function', function test( t ) {
 	t.end();
 });
 
+tape( 'the function returns positive zero for zero and negative zero', function test( t ) {
+	var v1 = cosm1( 0.0 );
+	var v2 = cosm1( -0.0 );
+
+	t.strictEqual( v1, 0.0, 'returns +0 for +0' );
+	t.strictEqual( 1.0/v1, PINF, 'returns +0 (not -0)' );
+
+	t.strictEqual( v2, 0.0, 'returns +0 for -0' );
+	t.strictEqual( 1.0/v2, PINF, 'returns +0 (not -0)' );
+
+	t.end();
+});
+
 tape( 'the function computes the cosine minus one more accurately inside the interval [-π/4,π/4]', function test( t ) {
 	var expected;
 	var x;