diff --git a/tests/ProjectTest.php b/tests/ProjectTest.php
new file mode 100644
index 0000000..eb37fa7
--- /dev/null
+++ b/tests/ProjectTest.php
@@ -0,0 +1,86 @@
+<?php
+declare(strict_types = 1);
+
+namespace LanguageServer\Tests\Server;
+
+use PHPUnit\Framework\TestCase;
+use LanguageServer\Tests\MockProtocolStream;
+use LanguageServer\{Server, Client, LanguageClient, Project, PhpDocument};
+use LanguageServer\Protocol\{TextDocumentItem, TextDocumentIdentifier, SymbolKind, DiagnosticSeverity, FormattingOptions};
+use AdvancedJsonRpc\{Request as RequestBody, Response as ResponseBody};
+
+class ProjectTest extends TestCase
+{
+    /**
+     * @var Project $project
+     */
+    private $project;
+
+    public function setUp()
+    {
+        $this->project = new Project(new LanguageClient(new MockProtocolStream()));
+    }
+
+    public function testGetDocumentCreatesNewDocument()
+    {
+        $document = $this->project->getDocument('file:///document1.php');
+
+        $this->assertNotNull($document);
+        $this->assertInstanceOf(PhpDocument::class, $document);
+    }
+
+    public function testGetDocumentCreatesDocumentOnce()
+    {
+        $document1 = $this->project->getDocument('file:///document1.php');
+        $document2 = $this->project->getDocument('file:///document1.php');
+
+        $this->assertSame($document1, $document2);
+    }
+
+    public function testFindSymbols()
+    {
+        $this->project->getDocument('file:///document1.php')->updateContent("<?php\nfunction foo() {}\nfunction bar() {}\n");
+        $this->project->getDocument('file:///document2.php')->updateContent("<?php\nfunction baz() {}\nfunction frob() {}\n");
+
+        $symbols = $this->project->findSymbols('ba');        
+
+        $this->assertEquals([
+            [
+                'name' => 'bar',
+                'kind' => SymbolKind::FUNCTION,
+                'location' => [
+                    'uri' => 'file:///document1.php',
+                    'range' => [
+                        'start' => [
+                            'line' => 2,
+                            'character' => 0
+                        ],
+                        'end' => [
+                            'line' => 2,
+                            'character' => 17
+                        ]
+                    ]
+                ],
+                'containerName' => null
+            ],
+            [
+                'name' => 'baz',
+                'kind' => SymbolKind::FUNCTION,
+                'location' => [
+                    'uri' => 'file:///document2.php',
+                    'range' => [
+                        'start' => [
+                            'line' => 1,
+                            'character' => 0
+                        ],
+                        'end' => [
+                            'line' => 1,
+                            'character' => 17
+                        ]
+                    ]
+                ],
+                'containerName' => null
+            ]
+        ], json_decode(json_encode($symbols), true));
+    }
+}
diff --git a/tests/Server/WorkspaceTest.php b/tests/Server/WorkspaceTest.php
new file mode 100644
index 0000000..5a62b85
--- /dev/null
+++ b/tests/Server/WorkspaceTest.php
@@ -0,0 +1,73 @@
+<?php
+declare(strict_types = 1);
+
+namespace LanguageServer\Tests\Server;
+
+use PHPUnit\Framework\TestCase;
+use LanguageServer\Tests\MockProtocolStream;
+use LanguageServer\{Server, Client, LanguageClient, Project, PhpDocument};
+use LanguageServer\Protocol\{TextDocumentItem, TextDocumentIdentifier, SymbolKind, DiagnosticSeverity, FormattingOptions};
+use AdvancedJsonRpc\{Request as RequestBody, Response as ResponseBody};
+
+class WorkspaceTest extends TestCase
+{
+    /**
+     * @var LanguageServer\Workspace $workspace
+     */
+    private $workspace;
+
+    public function setUp()
+    {
+        $client = new LanguageClient(new MockProtocolStream());
+        $project = new Project($client);
+        $this->workspace = new Server\Workspace($project, $client);
+
+        // create two documents
+        $project->getDocument('file:///document1.php')->updateContent("<?php\nfunction foo() {}\nfunction bar() {}\n");
+        $project->getDocument('file:///document2.php')->updateContent("<?php\nfunction baz() {}\nfunction frob() {}\n");        
+    }
+
+    public function testSymbol()
+    {
+        // Request symbols
+        $result = $this->workspace->symbol('f');
+        $this->assertEquals([
+            [
+                'name' => 'foo',
+                'kind' => SymbolKind::FUNCTION,
+                'location' => [
+                    'uri' => 'file:///document1.php',
+                    'range' => [
+                        'start' => [
+                            'line' => 1,
+                            'character' => 0
+                        ],
+                        'end' => [
+                            'line' => 1,
+                            'character' => 17
+                        ]
+                    ]
+                ],
+                'containerName' => null
+            ],
+            [
+                'name' => 'frob',
+                'kind' => SymbolKind::FUNCTION,
+                'location' => [
+                    'uri' => 'file:///document2.php',
+                    'range' => [
+                        'start' => [
+                            'line' => 2,
+                            'character' => 0
+                        ],
+                        'end' => [
+                            'line' => 2,
+                            'character' => 18
+                        ]
+                    ]
+                ],
+                'containerName' => null
+            ]
+        ], json_decode(json_encode($result), true));
+    }
+}