javaparser-symbol-solver-testing/src/test/java/com/github/javaparser/symbolsolver/resolution/FieldsResolutionTest.java

/*
 * Copyright 2016 Federico Tomassetti
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.github.javaparser.symbolsolver.resolution;

import com.github.javaparser.ParseException;
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.body.MethodDeclaration;
import com.github.javaparser.ast.expr.*;
import com.github.javaparser.ast.stmt.ExpressionStmt;
import com.github.javaparser.ast.stmt.ReturnStmt;
import com.github.javaparser.resolution.declarations.ResolvedValueDeclaration;
import com.github.javaparser.resolution.types.ResolvedType;
import com.github.javaparser.symbolsolver.javaparser.Navigator;
import com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade;
import com.github.javaparser.symbolsolver.model.resolution.SymbolReference;
import com.github.javaparser.symbolsolver.resolution.typesolvers.CombinedTypeSolver;
import com.github.javaparser.symbolsolver.resolution.typesolvers.JavaParserTypeSolver;
import com.github.javaparser.symbolsolver.resolution.typesolvers.ReflectionTypeSolver;
import org.junit.Test;

import java.io.File;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class FieldsResolutionTest extends AbstractResolutionTest {

    @Test
    public void accessClassFieldThroughThis() {
        CompilationUnit cu = parseSample("AccessClassMemberThroughThis");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "AccessClassMemberThroughThis");
        MethodDeclaration method = Navigator.demandMethod(clazz, "getLabel2");
        ReturnStmt returnStmt = (ReturnStmt) method.getBody().get().getStatements().get(0);
        Expression expression = returnStmt.getExpression().get();

        ResolvedType ref = JavaParserFacade.get(new ReflectionTypeSolver()).getType(expression);
        assertEquals("java.lang.String", ref.describe());
    }

    @Test
    public void accessClassFieldThroughThisWithCompetingSymbolInParentContext() {
        CompilationUnit cu = parseSample("AccessClassMemberThroughThis");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "AccessClassMemberThroughThis");
        MethodDeclaration method = Navigator.demandMethod(clazz, "setLabel");
        ExpressionStmt expressionStmt = (ExpressionStmt) method.getBody().get().getStatements().get(0);
        AssignExpr assignExpr = (AssignExpr) expressionStmt.getExpression();
        FieldAccessExpr fieldAccessExpr = (FieldAccessExpr) assignExpr.getTarget();

        File src = adaptPath(new File("src/test/resources"));
        CombinedTypeSolver typeSolver = new CombinedTypeSolver(new JavaParserTypeSolver(src), new ReflectionTypeSolver());
        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);
        SymbolReference<? extends ResolvedValueDeclaration> ref = symbolSolver.solveSymbol(fieldAccessExpr.getName().getId(), fieldAccessExpr);

        assertTrue(ref.isSolved());
        assertTrue(ref.getCorrespondingDeclaration().isField());
    }

    @Test
    public void accessEnumFieldThroughThis() {
        CompilationUnit cu = parseSample("AccessEnumMemberThroughThis");
        com.github.javaparser.ast.body.EnumDeclaration enumDecl = Navigator.demandEnum(cu, "AccessEnumMemberThroughThis");
        MethodDeclaration method = Navigator.demandMethod(enumDecl, "getLabel");
        SimpleName expression = Navigator.findSimpleName(method, "label").get();

        SymbolReference ref = JavaParserFacade.get(new ReflectionTypeSolver()).solve(expression);
        assertTrue(ref.isSolved());
        assertEquals("label", ref.getCorrespondingDeclaration().getName());
    }

    @Test
    public void accessEnumMethodThroughThis() {
        CompilationUnit cu = parseSample("AccessEnumMemberThroughThis");
        com.github.javaparser.ast.body.EnumDeclaration enumDecl = Navigator.demandEnum(cu, "AccessEnumMemberThroughThis");
        MethodDeclaration method = Navigator.demandMethod(enumDecl, "getLabel2");
        ReturnStmt returnStmt = (ReturnStmt) method.getBody().get().getStatements().get(0);
        Expression expression = returnStmt.getExpression().get();

        ResolvedType ref = JavaParserFacade.get(new ReflectionTypeSolver()).getType(expression);
        assertEquals("java.lang.String", ref.describe());
    }

    @Test
    public void accessFieldThroughSuper() {
        CompilationUnit cu = parseSample("AccessThroughSuper");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "AccessThroughSuper.SubClass");
        MethodDeclaration method = Navigator.demandMethod(clazz, "fieldTest");
        ReturnStmt returnStmt = (ReturnStmt) method.getBody().get().getStatements().get(0);
        Expression expression = returnStmt.getExpression().get();

        ResolvedType ref = JavaParserFacade.get(new ReflectionTypeSolver()).getType(expression);
        assertEquals("java.lang.String", ref.describe());
    }
}