test: add test cases

---
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: headlessNode

lib/node_modules/@stdlib/ndarray/fill-slice/test/test.js

@@ -450,7 +450,6 @@ tape( 'the function fills an input ndarray slice with a specified value (row-maj
 	var s0;
 	var s1;
 	var s2;
-	var s;
 	var o;
 	var x;
 
@@ -484,7 +483,7 @@ tape( 'the function fills an input ndarray slice with a specified value (row-maj
 
 	t.strictEqual( isSameComplex128Array( x.data, expected ), true, 'returns expected value' );
 
-	fillSlice( x, new Complex128( -10.0, -20.0 ), s );
+	fillSlice( x, new Complex128( -10.0, -20.0 ), [ s0, s1, s2 ] );
 
 	expected = new Complex128Array([
 		-10.0,
@@ -514,7 +513,6 @@ tape( 'the function fills an input ndarray slice with a specified value (row-maj
 	var s0;
 	var s1;
 	var s2;
-	var s;
 	var o;
 	var x;
 
@@ -548,7 +546,7 @@ tape( 'the function fills an input ndarray slice with a specified value (row-maj
 
 	t.strictEqual( isSameComplex128Array( x.data, expected ), true, 'returns expected value' );
 
-	fillSlice( x, new Complex128( -10.0, -20.0 ), s );
+	fillSlice( x, new Complex128( -10.0, -20.0 ), [ s0, s1, s2 ] );
 
 	expected = new Complex128Array([
 		-10.0,