Add test case for DefinitionResolver

tests/DefinitionResolverTest.php

@@ -0,0 +1,51 @@
+<?php
+declare(strict_types = 1);
+
+namespace LanguageServer\Tests;
+
+use PHPUnit\Framework\TestCase;
+use LanguageServer\Index\Index;
+use LanguageServer\{DefinitionResolver, Parser};
+
+class DefinitionResolverTest extends TestCase
+{
+    public function testCreateDefinitionFromNode()
+    {
+        $parser = new Parser;
+        $stmts = $parser->parse("<?php\ndefine('TEST_DEFINE', true);");
+        $stmts[0]->setAttribute('ownerDocument', new MockPhpDocument);
+
+        $index = new Index;
+        $definitionResolver = new DefinitionResolver($index);
+        $def = $definitionResolver->createDefinitionFromNode($stmts[0], '\TEST_DEFINE');
+
+        $this->assertInstanceOf(\phpDocumentor\Reflection\Types\Boolean::class, $def->type);
+    }
+
+    public function testGetTypeFromNode()
+    {
+        $parser = new Parser;
+        $stmts = $parser->parse("<?php\ndefine('TEST_DEFINE', true);");
+        $stmts[0]->setAttribute('ownerDocument', new MockPhpDocument);
+
+        $index = new Index;
+        $definitionResolver = new DefinitionResolver($index);
+        $type = $definitionResolver->getTypeFromNode($stmts[0]);
+
+        $this->assertInstanceOf(\phpDocumentor\Reflection\Types\Boolean::class, $type);
+    }
+
+    public function testGetDefinedFqn()
+    {
+        // define('XXX') (only one argument) must not introduce a new symbol
+        $parser = new Parser;
+        $stmts = $parser->parse("<?php\ndefine('TEST_DEFINE');");
+        $stmts[0]->setAttribute('ownerDocument', new MockPhpDocument);
+
+        $index = new Index;
+        $definitionResolver = new DefinitionResolver($index);
+        $fqn = $definitionResolver->getDefinedFqn($stmts[0]);
+
+        $this->assertNull($fqn);
+    }
+}

tests/MockPhpDocument.php

@@ -0,0 +1,20 @@
+<?php
+declare(strict_types = 1);
+
+namespace LanguageServer\Tests;
+
+/**
+ * A fake document for tests
+ */
+class MockPhpDocument
+{
+    /**
+     * Returns fake uri
+     *
+     * @return string
+     */
+    public function getUri()
+    {
+        return 'file:///whatever';
+    }
+}