Add Unicode test cases

Author: Planeshifter

lib/node_modules/@stdlib/string/substring-before-last/test/test.js

@@ -111,6 +111,27 @@ tape( 'the function returns the substring before the last occurrence of the prov
 	t.end();
 });
 
+tape( 'the function returns the substring before a provided search string (Unicode characters)', function test( t ) {
+	var expected;
+	var actual;
+	var str;
+
+	str = 'beep 😀 boop 😀 baz';
+	actual = substringBeforeLast( str, '😀' );
+	expected = 'beep 😀 boop ';
+	t.strictEqual( actual, expected, 'returns expected value' );
+
+	str = '🤖 Robot army 🤖!';
+	actual = substringBeforeLast( str, '🤖' );
+	expected = '🤖 Robot army ';
+
+	str = '🐺 Wolf brothers 🐺';
+	actual = substringBeforeLast( str, 'o' );
+	expected = '🐺 Wolf brothers ';
+
+	t.end();
+});
+
 tape( 'the function returns the entire string if the search string is not found', function test( t ) {
 	var expected;
 	var actual;

lib/node_modules/@stdlib/string/substring-before/test/test.js

@@ -109,6 +109,27 @@ tape( 'the function returns the substring before a provided search string', func
 	t.end();
 });
 
+tape( 'the function returns the substring before a provided search string (Unicode characters)', function test( t ) {
+	var expected;
+	var actual;
+	var str;
+
+	str = 'beep 😀 boop 😀 baz';
+	actual = substringBefore( str, '😀' );
+	expected = 'beep ';
+	t.strictEqual( actual, expected, 'returns expected value' );
+
+	str = '🤖 Robot army 🤖!';
+	actual = substringBefore( str, '🤖' );
+	expected = '';
+
+	str = '🐺 Wolf brothers 🐺';
+	actual = substringBefore( str, 'o' );
+	expected = '🐺 W';
+
+	t.end();
+});
+
 tape( 'the function returns the entire string if the search string is not found', function test( t ) {
 	var expected;
 	var actual;