diff --git a/src/module-elasticsuite-core/Test/Unit/Model/SuggestedTermsProviderTest.php b/src/module-elasticsuite-core/Test/Unit/Model/SuggestedTermsProviderTest.php
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+++ b/src/module-elasticsuite-core/Test/Unit/Model/SuggestedTermsProviderTest.php
@@ -0,0 +1,256 @@
+<?php
+/**
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade Smile ElasticSuite to newer
+ * versions in the future.
+ *
+ * @category  Smile
+ * @package   Smile\ElasticsuiteCore
+ * @author    Romain Ruaud <romain.ruaud@smile.fr>
+ * @copyright 2024 Smile
+ * @license   Open Software License ("OSL") v. 3.0
+ */
+namespace Smile\ElasticsuiteCore\Test\Unit\Model;
+
+use PHPUnit\Framework\TestCase;
+use Smile\ElasticsuiteCore\Model\Autocomplete\SuggestedTermsProvider;
+use Smile\ElasticsuiteCore\Helper\Autocomplete;
+use Smile\ElasticsuiteCore\Model\Autocomplete\Terms\DataProvider as TermDataProvider;
+use Smile\ElasticsuiteCore\Model\Search\QueryStringProviderFactory;
+use Magento\Search\Model\Autocomplete\Item as TermItem;
+
+/**
+ * Search API unit testing.
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
+ *
+ * @category  Smile
+ * @package   Smile\ElasticsuiteCore
+ * @author    Romain Ruaud <romain.ruaud@smile.fr>
+ */
+class SuggestedTermsProviderTest extends TestCase
+{
+    private $helperMock;
+    private $termDataProviderMock;
+    private $queryStringProviderFactoryMock;
+    private $suggestedTermsProvider;
+
+    /**
+     * Test setup
+     *
+     * @return void
+     */
+    protected function setUp(): void
+    {
+        $this->helperMock                     = $this->createMock(Autocomplete::class);
+        $this->termDataProviderMock           = $this->createMock(TermDataProvider::class);
+        $this->queryStringProviderFactoryMock = $this->createMock(QueryStringProviderFactory::class);
+
+        $this->suggestedTermsProvider = new SuggestedTermsProvider(
+            $this->helperMock,
+            $this->termDataProviderMock,
+            $this->queryStringProviderFactoryMock
+        );
+    }
+
+    /**
+     * Test case when extension is enabled and no limit on the number of suggested terms.
+     * It should return all available terms.
+     */
+    public function testGetSuggestedTermsWithExtensionEnabledAndNoLimit()
+    {
+        $this->helperMock->method('isExtensionEnabled')->willReturn(true);
+        $this->helperMock->method('isExtensionStoppedOnMatch')->willReturn(false);
+        $this->helperMock->method('isExtensionLimited')->willReturn(false);
+
+        // Create mock TermItems with terms starting with 'top'.
+        $termItem1 = $this->createMock(TermItem::class);
+        $termItem1->method('getTitle')->willReturn('top');
+
+        $termItem2 = $this->createMock(TermItem::class);
+        $termItem2->method('getTitle')->willReturn('top blouse');
+
+        $termItem3 = $this->createMock(TermItem::class);
+        $termItem3->method('getTitle')->willReturn('top tank');
+
+        $this->termDataProviderMock->method('getItems')->willReturn([$termItem1, $termItem2, $termItem3]);
+
+        $expectedTerms = ['top', 'top blouse', 'top tank'];
+
+        $terms = $this->suggestedTermsProvider->getSuggestedTerms();
+
+        $this->assertEquals($expectedTerms, $terms);
+    }
+
+    /**
+     * Test case when extension is enabled, and results are limited to one term.
+     * It should return only the first term.
+     */
+    public function testGetSuggestedTermsWithLimitedResultsOneTerm()
+    {
+        $this->helperMock->method('isExtensionEnabled')->willReturn(true);
+        $this->helperMock->method('isExtensionStoppedOnMatch')->willReturn(false);
+        $this->helperMock->method('isExtensionLimited')->willReturn(true);
+        $this->helperMock->method('getExtensionSize')->willReturn(1);
+
+        // Create mock TermItems with terms starting with 'top'.
+        $termItem1 = $this->createMock(TermItem::class);
+        $termItem1->method('getTitle')->willReturn('top');
+
+        $termItem2 = $this->createMock(TermItem::class);
+        $termItem2->method('getTitle')->willReturn('top blouse');
+
+        $termItem3 = $this->createMock(TermItem::class);
+        $termItem3->method('getTitle')->willReturn('top tank');
+
+        $this->termDataProviderMock->method('getItems')->willReturn([$termItem1, $termItem2, $termItem3]);
+
+        // Expect the terms to be limited to only one item.
+        $expectedTerms = ['top'];
+
+        $terms = $this->suggestedTermsProvider->getSuggestedTerms();
+
+        $this->assertEquals($expectedTerms, $terms);
+    }
+
+    /**
+     * Test case when extension is enabled, and results are limited to two terms.
+     * It should return the first two terms.
+     */
+    public function testGetSuggestedTermsWithLimitedResultsTwoTerms()
+    {
+        $this->helperMock->method('isExtensionEnabled')->willReturn(true);
+        $this->helperMock->method('isExtensionStoppedOnMatch')->willReturn(false);
+        $this->helperMock->method('isExtensionLimited')->willReturn(true);
+        $this->helperMock->method('getExtensionSize')->willReturn(2);
+
+        // Create mock TermItems with terms starting with 'top'.
+        $termItem1 = $this->createMock(TermItem::class);
+        $termItem1->method('getTitle')->willReturn('top');
+
+        $termItem2 = $this->createMock(TermItem::class);
+        $termItem2->method('getTitle')->willReturn('top blouse');
+
+        $termItem3 = $this->createMock(TermItem::class);
+        $termItem3->method('getTitle')->willReturn('top tank');
+
+        $this->termDataProviderMock->method('getItems')->willReturn([$termItem1, $termItem2, $termItem3]);
+
+        $expectedTerms = ['top', 'top blouse'];
+
+        $terms = $this->suggestedTermsProvider->getSuggestedTerms();
+
+        $this->assertEquals($expectedTerms, $terms);
+    }
+
+    /**
+     * Test case when extension is enabled, and results are limited to three terms.
+     * It should return the first three terms.
+     */
+    public function testGetSuggestedTermsWithLimitedResultsThreeTerms()
+    {
+        $this->helperMock->method('isExtensionEnabled')->willReturn(true);
+        $this->helperMock->method('isExtensionStoppedOnMatch')->willReturn(false);
+        $this->helperMock->method('isExtensionLimited')->willReturn(true);
+        $this->helperMock->method('getExtensionSize')->willReturn(3);
+
+        // Create mock TermItems with terms starting with 'top'.
+        $termItem1 = $this->createMock(TermItem::class);
+        $termItem1->method('getTitle')->willReturn('top');
+
+        $termItem2 = $this->createMock(TermItem::class);
+        $termItem2->method('getTitle')->willReturn('top blouse');
+
+        $termItem3 = $this->createMock(TermItem::class);
+        $termItem3->method('getTitle')->willReturn('top tank');
+
+        $this->termDataProviderMock->method('getItems')->willReturn([$termItem1, $termItem2, $termItem3]);
+
+        $expectedTerms = ['top', 'top blouse', 'top tank'];
+
+        $terms = $this->suggestedTermsProvider->getSuggestedTerms();
+
+        $this->assertEquals($expectedTerms, $terms);
+    }
+
+    /**
+     * Test case when extension is enabled, and limit is greater than the number of available terms.
+     * It should return all available terms.
+     */
+    public function testGetSuggestedTermsWithLimitedResultsLessThanSize()
+    {
+        $this->helperMock->method('isExtensionEnabled')->willReturn(true);
+        $this->helperMock->method('isExtensionStoppedOnMatch')->willReturn(false);
+        $this->helperMock->method('isExtensionLimited')->willReturn(true);
+        // Limit set to 5, but only 3 items are available.
+        $this->helperMock->method('getExtensionSize')->willReturn(5);
+
+        // Create mock TermItems with terms starting with 'top'.
+        $termItem1 = $this->createMock(TermItem::class);
+        $termItem1->method('getTitle')->willReturn('top');
+
+        $termItem2 = $this->createMock(TermItem::class);
+        $termItem2->method('getTitle')->willReturn('top blouse');
+
+        $termItem3 = $this->createMock(TermItem::class);
+        $termItem3->method('getTitle')->willReturn('top tank');
+
+        $this->termDataProviderMock->method('getItems')->willReturn([$termItem1, $termItem2, $termItem3]);
+
+        $expectedTerms = ['top', 'top blouse', 'top tank'];
+
+        $terms = $this->suggestedTermsProvider->getSuggestedTerms();
+
+        $this->assertEquals($expectedTerms, $terms);
+    }
+
+    /**
+     * Test case when extension is disabled.
+     * It should return the query string as the term.
+     */
+    public function testGetSuggestedTermsWhenExtensionDisabled()
+    {
+        $this->helperMock->method('isExtensionEnabled')->willReturn(false);
+
+        $queryStringProviderMock = $this->createMock(\Smile\ElasticsuiteCore\Model\Search\QueryStringProvider::class);
+        $queryStringProviderMock->method('get')->willReturn('apple');
+        $this->queryStringProviderFactoryMock->method('create')->willReturn($queryStringProviderMock);
+
+        // Expect the terms to be the query string since the extension is disabled.
+        $expectedTerms = ['apple'];
+
+        $terms = $this->suggestedTermsProvider->getSuggestedTerms();
+
+        $this->assertEquals($expectedTerms, $terms);
+    }
+
+    /**
+     * Test case when extension is enabled and stopped on match.
+     * It should return only the term that matches the query string.
+     */
+    public function testGetSuggestedTermsWithExtensionStoppedOnMatch()
+    {
+        $this->helperMock->method('isExtensionEnabled')->willReturn(true);
+        $this->helperMock->method('isExtensionStoppedOnMatch')->willReturn(true);
+        $this->helperMock->method('isExtensionLimited')->willReturn(false);
+
+        $queryStringProviderMock = $this->createMock(\Smile\ElasticsuiteCore\Model\Search\QueryStringProvider::class);
+        $queryStringProviderMock->method('get')->willReturn('top');
+        $this->queryStringProviderFactoryMock->method('create')->willReturn($queryStringProviderMock);
+
+        $termItem1 = $this->createMock(TermItem::class);
+        $termItem1->method('getTitle')->willReturn('top');
+
+        $termItem2 = $this->createMock(TermItem::class);
+        $termItem2->method('getTitle')->willReturn('top blouse');
+
+        $this->termDataProviderMock->method('getItems')->willReturn([$termItem1, $termItem2]);
+
+        // Expect the terms to be only 'top' because of the stop on match logic.
+        $expectedTerms = ['top'];
+
+        $terms = $this->suggestedTermsProvider->getSuggestedTerms();
+
+        $this->assertEquals($expectedTerms, $terms);
+    }
+}