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package org.netbeans.modules.ruby;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import org.jruby.ast.DefnNode;
import org.jruby.ast.IterNode;
import org.jruby.ast.Node;
import org.jruby.ast.NodeTypes;
import org.jruby.ast.types.INameNode;
import org.openide.filesystems.FileObject;

/**
 *
 * @todo Lots of other methods to test!
 *  
 * @author Tor Norbye
 */
public class AstUtilitiesTest extends RubyTestBase {
    
    public AstUtilitiesTest(String testName) {
        super(testName);
    }

    public void testFindbySignature1() throws Exception {
        // Test top level methods
        Node root = getRootNode("testfiles/top_level.rb");
        Node node = AstUtilities.findBySignature(root, "Object#bar(baz)");
        assertNotNull(node);
        assertEquals("bar", ((INameNode)node).getName());
    }

    public void testFindbySignature2() throws Exception {
        Node root = getRootNode("testfiles/ape.rb");
        Node node = AstUtilities.findBySignature(root, "Ape#test_sorting(coll)");
        assertNotNull(node);
        assertEquals("test_sorting", ((INameNode)node).getName());
    }

    public void testFindbySignatureNested() throws Exception {
        Node root = getRootNode("testfiles/resolv.rb");
        Node node = AstUtilities.findBySignature(root, "Resolv::DNS::lazy_initialize");
        assertNotNull(node);
        assertEquals("lazy_initialize", ((INameNode)node).getName());
    }
    
    public void testFindbySignatureInstance() throws Exception {
        Node root = getRootNode("testfiles/ape.rb");
        Node node = AstUtilities.findBySignature(root, "Ape#@dialogs");
        assertNotNull(node);
        assertEquals(node.nodeId, NodeTypes.INSTASGNNODE);
        assertEquals("@dialogs", ((INameNode)node).getName());
    }

    public void testFindbySignatureClassVar() throws Exception {
        Node root = getRootNode("testfiles/ape.rb");
        Node node = AstUtilities.findBySignature(root, "Ape#@@debugging");
        assertNotNull(node);
        assertEquals(node.nodeId, NodeTypes.CLASSVARASGNNODE);
        assertEquals("@@debugging", ((INameNode)node).getName());
    }

    public void testFindRequires() throws Exception {
        Node root = getRootNode("testfiles/ape.rb");
        Set<String> requires = AstUtilities.getRequires(root);
        List<String> expected = Arrays.asList(new String[] {
            "rexml/document",
            "rubygems",
            "builder",
            "getter",
            "service",
            "samples",
            "entry",
            "poster",
            "collection",
            "deleter",
            "putter",
            "feed",
            "html",
            "crumbs",
            "escaper", 
            "categories",
            "names",
            "validator",
            "authent"
        });
        assertEquals(expected, requires);
    }
    
    public void testGetMethodName() {
        String testFile = "testfiles/ape.rb";
        FileObject fileObject = getTestFile(testFile);
        String text = readFile(fileObject);
        
        int offset = 0;
        String method = AstUtilities.getMethodName(fileObject, offset);
        assertNull(method);
        
        offset = text.indexOf("@w.text! lines[-1]");
        method = AstUtilities.getMethodName(fileObject, offset);
        assertEquals("report_li", method);
        
        offset = text.indexOf("step[1 .. -1].each { |li| report_li(nil, nil, li) }");
        method = AstUtilities.getMethodName(fileObject, offset);
        assertEquals("report_html", method);
    }
    
    public void testAddNodesByType() {
        Node root = getRootNode("testfiles/unused.rb");
        List<Node> result = new ArrayList<Node>();
        AstUtilities.addNodesByType(root, new int[] { NodeTypes.ITERNODE }, result);
        assertEquals(1, result.size());
        assertTrue(result.get(0) instanceof IterNode);
    }
    
    public void testAddNodesByType2() {
        Node root = getRootNode("testfiles/top_level.rb");
        List<Node> result = new ArrayList<Node>();
        AstUtilities.addNodesByType(root, new int[] { NodeTypes.DEFNNODE }, result);
        assertEquals(2, result.size());
        assertTrue(result.get(0) instanceof DefnNode);
    }
}
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