/*
 * 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.JavaParser;
import com.github.javaparser.ParseException;
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.body.MethodDeclaration;
import com.github.javaparser.ast.body.Parameter;
import com.github.javaparser.ast.expr.AssignExpr;
import com.github.javaparser.ast.expr.Expression;
import com.github.javaparser.ast.expr.MethodCallExpr;
import com.github.javaparser.ast.expr.NameExpr;
import com.github.javaparser.ast.stmt.ExpressionStmt;
import com.github.javaparser.resolution.MethodUsage;
import com.github.javaparser.resolution.declarations.ResolvedClassDeclaration;
import com.github.javaparser.resolution.declarations.ResolvedReferenceTypeDeclaration;
import com.github.javaparser.resolution.declarations.ResolvedTypeDeclaration;
import com.github.javaparser.resolution.types.ResolvedType;
import com.github.javaparser.symbolsolver.AbstractTest;
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.model.resolution.TypeSolver;
import com.github.javaparser.symbolsolver.reflectionmodel.ReflectionClassDeclaration;
import com.github.javaparser.symbolsolver.resolution.typesolvers.*;
import org.junit.Test;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class ContextTest extends AbstractTest {

    private TypeSolver typeSolver = new CombinedTypeSolver(new MemoryTypeSolver(), new ReflectionTypeSolver());

    private CompilationUnit parseSample(String sampleName) {
        InputStream is = ContextTest.class.getClassLoader().getResourceAsStream(sampleName + ".java.txt");
        return JavaParser.parse(is);
    }

    @Test
    public void resolveDeclaredFieldReference() {
        CompilationUnit cu = parseSample("ReferencesToField");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration referencesToField = Navigator.demandClass(cu, "ReferencesToField");
        MethodDeclaration method1 = Navigator.demandMethod(referencesToField, "method1");
        ExpressionStmt stmt = (ExpressionStmt) method1.getBody().get().getStatements().get(0);
        AssignExpr assignExpr = (AssignExpr) stmt.getExpression();

        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);
        SymbolReference symbolReference = symbolSolver.solveSymbol("i", assignExpr.getTarget());

        assertEquals(true, symbolReference.isSolved());
        assertEquals("i", symbolReference.getCorrespondingDeclaration().getName());
        assertEquals(true, symbolReference.getCorrespondingDeclaration().isField());
    }

    @Test
    public void resolveInheritedFieldReference() {
        CompilationUnit cu = parseSample("ReferencesToField");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration referencesToField = Navigator.demandClass(cu, "ReferencesToFieldExtendingClass");
        MethodDeclaration method1 = Navigator.demandMethod(referencesToField, "method2");
        ExpressionStmt stmt = (ExpressionStmt) method1.getBody().get().getStatements().get(0);
        AssignExpr assignExpr = (AssignExpr) stmt.getExpression();

        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);
        SymbolReference symbolReference = symbolSolver.solveSymbol("i", assignExpr.getTarget());

        assertEquals(true, symbolReference.isSolved());
        assertEquals("i", symbolReference.getCorrespondingDeclaration().getName());
        assertEquals(true, symbolReference.getCorrespondingDeclaration().isField());
    }

    @Test
    public void resolveParameterReference() {
        CompilationUnit cu = parseSample("ReferencesToParameter");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration referencesToField = Navigator.demandClass(cu, "ReferenceToParameter");
        MethodDeclaration method1 = Navigator.demandMethod(referencesToField, "aMethod");
        NameExpr foo = Navigator.findNameExpression(method1, "foo").get();

        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);
        SymbolReference symbolReference = symbolSolver.solveSymbol("foo", foo);

        assertEquals(true, symbolReference.isSolved());
        assertEquals("foo", symbolReference.getCorrespondingDeclaration().getName());
        assertEquals(true, symbolReference.getCorrespondingDeclaration().isParameter());
    }

    @Test
    public void resolveReferenceToImportedType() {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration referencesToField = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(referencesToField, "findType");
        Parameter param = method.getParameters().get(0);

        ResolvedClassDeclaration compilationUnitDecl = mock(ResolvedClassDeclaration.class);
        when(compilationUnitDecl.getName()).thenReturn("CompilationUnit");
        when(compilationUnitDecl.getQualifiedName()).thenReturn("com.github.javaparser.ast.CompilationUnit");
        TypeSolver typeSolver = mock(TypeSolver.class);
        when(typeSolver.getRoot()).thenReturn(typeSolver);
        when(typeSolver.solveType("java.lang.Object")).thenReturn(new ReflectionClassDeclaration(Object.class, typeSolver));
        when(typeSolver.tryToSolveType("com.github.javaparser.ast.CompilationUnit")).thenReturn(SymbolReference.solved(compilationUnitDecl));
        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);

        SymbolReference<? extends ResolvedTypeDeclaration> ref = symbolSolver.solveType("CompilationUnit", param);

        assertEquals(true, ref.isSolved());
        assertEquals("CompilationUnit", ref.getCorrespondingDeclaration().getName());
        assertEquals("com.github.javaparser.ast.CompilationUnit", ref.getCorrespondingDeclaration().getQualifiedName());
    }

    @Test
    public void resolveReferenceUsingQualifiedName() {
        CompilationUnit cu = parseSample("Navigator2");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration referencesToField = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(referencesToField, "findType");
        Parameter param = method.getParameters().get(0);

        ResolvedClassDeclaration compilationUnitDecl = mock(ResolvedClassDeclaration.class);
        when(compilationUnitDecl.getName()).thenReturn("CompilationUnit");
        when(compilationUnitDecl.getQualifiedName()).thenReturn("com.github.javaparser.ast.CompilationUnit");
        TypeSolver typeSolver = mock(TypeSolver.class);
        //when(typeSolver.tryToSolveType("java.lang.com.github.javaparser.ast.CompilationUnit")).thenReturn(SymbolReference.unsolved(ClassDeclaration.class));
        when(typeSolver.getRoot()).thenReturn(typeSolver);
        when(typeSolver.solveType("java.lang.Object")).thenReturn(new ReflectionClassDeclaration(Object.class, typeSolver));
        when(typeSolver.tryToSolveType("com.github.javaparser.ast.CompilationUnit")).thenReturn(SymbolReference.solved(compilationUnitDecl));
        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);
        
        SymbolReference<? extends ResolvedTypeDeclaration> ref = symbolSolver.solveType("com.github.javaparser.ast.CompilationUnit", param);

        assertEquals(true, ref.isSolved());
        assertEquals("CompilationUnit", ref.getCorrespondingDeclaration().getName());
        assertEquals("com.github.javaparser.ast.CompilationUnit", ref.getCorrespondingDeclaration().getQualifiedName());
    }

    @Test
    public void resolveReferenceToClassesInTheSamePackage() {
        CompilationUnit cu = parseSample("Navigator3");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration referencesToField = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(referencesToField, "findType");
        Parameter param = method.getParameters().get(0);

        ResolvedClassDeclaration compilationUnitDecl = mock(ResolvedClassDeclaration.class);
        when(compilationUnitDecl.getName()).thenReturn("CompilationUnit");
        when(compilationUnitDecl.getQualifiedName()).thenReturn("my.packagez.CompilationUnit");
        TypeSolver typeSolver = mock(TypeSolver.class);
        when(typeSolver.getRoot()).thenReturn(typeSolver);
        when(typeSolver.solveType("java.lang.Object")).thenReturn(new ReflectionClassDeclaration(Object.class, typeSolver));
        when(typeSolver.tryToSolveType("my.packagez.CompilationUnit")).thenReturn(SymbolReference.solved(compilationUnitDecl));
        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);

        SymbolReference<? extends ResolvedTypeDeclaration> ref = symbolSolver.solveType("CompilationUnit", param);

        assertEquals(true, ref.isSolved());
        assertEquals("CompilationUnit", ref.getCorrespondingDeclaration().getName());
        assertEquals("my.packagez.CompilationUnit", ref.getCorrespondingDeclaration().getQualifiedName());
    }

    @Test
    public void resolveReferenceToClassInJavaLang() {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration referencesToField = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(referencesToField, "findType");
        Parameter param = method.getParameters().get(1);

        ResolvedClassDeclaration stringDecl = mock(ResolvedClassDeclaration.class);
        when(stringDecl.getName()).thenReturn("String");
        when(stringDecl.getQualifiedName()).thenReturn("java.lang.String");
        TypeSolver typeSolver = mock(TypeSolver.class);
        when(typeSolver.tryToSolveType("me.tomassetti.symbolsolver.javaparser.String")).thenReturn(SymbolReference.unsolved(ResolvedReferenceTypeDeclaration.class));
        when(typeSolver.getRoot()).thenReturn(typeSolver);
        when(typeSolver.solveType("java.lang.Object")).thenReturn(new ReflectionClassDeclaration(Object.class, typeSolver));
        when(typeSolver.tryToSolveType("java.lang.String")).thenReturn(SymbolReference.solved(stringDecl));
        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);

        SymbolReference<? extends ResolvedTypeDeclaration> ref = symbolSolver.solveType("String", param);

        assertEquals(true, ref.isSolved());
        assertEquals("String", ref.getCorrespondingDeclaration().getName());
        assertEquals("java.lang.String", ref.getCorrespondingDeclaration().getQualifiedName());
    }

    @Test
    public void resolveReferenceToMethod() throws ParseException, IOException {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration referencesToField = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(referencesToField, "findType");
        MethodCallExpr callToGetTypes = Navigator.findMethodCall(method, "getTypes").get();

        String pathToJar = adaptPath("src/test/resources/javaparser-core-2.1.0.jar");
        TypeSolver typeSolver = new CombinedTypeSolver(new JarTypeSolver(pathToJar), new ReflectionTypeSolver(true));
        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);

        MethodUsage ref = symbolSolver.solveMethod("getTypes", Collections.emptyList(), callToGetTypes);

        assertEquals("getTypes", ref.getName());
        assertEquals("com.github.javaparser.ast.CompilationUnit", ref.declaringType().getQualifiedName());

        //verify(typeSolver);
    }

    @Test
    public void resolveCascadeOfReferencesToMethod() throws ParseException, IOException {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration referencesToField = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(referencesToField, "findType");
        MethodCallExpr callToStream = Navigator.findMethodCall(method, "stream").get();

        String pathToJar = adaptPath("src/test/resources/javaparser-core-2.1.0.jar");
        TypeSolver typeSolver = new CombinedTypeSolver(new JarTypeSolver(pathToJar), new ReflectionTypeSolver(true));
        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);
        MethodUsage ref = symbolSolver.solveMethod("stream", Collections.emptyList(), callToStream);

        assertEquals("stream", ref.getName());
        assertEquals("java.util.Collection", ref.declaringType().getQualifiedName());
    }

    @Test
    public void resolveReferenceToMethodCalledOnArrayAccess() {
        CompilationUnit cu = parseSample("ArrayAccess");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "ArrayAccess");
        MethodDeclaration method = Navigator.demandMethod(clazz, "access");
        MethodCallExpr callToTrim = Navigator.findMethodCall(method, "trim").get();

        File src = adaptPath(new File("src/test/resources"));
        TypeSolver typeSolver = new CombinedTypeSolver(new ReflectionTypeSolver(), new JavaParserTypeSolver(src));
        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);
        MethodUsage ref = symbolSolver.solveMethod("trim", Collections.emptyList(), callToTrim);

        assertEquals("trim", ref.getName());
        assertEquals("java.lang.String", ref.declaringType().getQualifiedName());
    }

    @Test
    public void resolveReferenceToJreType() {
        CompilationUnit cu = parseSample("NavigatorSimplified");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "foo");
        com.github.javaparser.ast.type.Type streamJavaParserType = method.getParameters().get(0).getType();

        TypeSolver typeSolver = new ReflectionTypeSolver();
        ResolvedType streamType = JavaParserFacade.get(typeSolver).convert(streamJavaParserType, method);

        assertEquals("java.util.stream.Stream<java.lang.String>", streamType.describe());
    }

    @Test
    public void resolveReferenceToMethodWithLambda() {
        CompilationUnit cu = parseSample("NavigatorSimplified");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "findType");
        MethodCallExpr methodCallExpr = Navigator.findMethodCall(method, "filter").get();

        TypeSolver typeSolver = new ReflectionTypeSolver();
        ResolvedType ref = JavaParserFacade.get(typeSolver).getType(methodCallExpr);

        assertEquals("java.util.stream.Stream<java.lang.String>", ref.describe());
        assertEquals(1, ref.asReferenceType().typeParametersValues().size());
        assertEquals("java.lang.String", ref.asReferenceType().typeParametersValues().get(0).describe());
    }

    @Test
    public void resolveReferenceToLambdaParamBase() {
        CompilationUnit cu = parseSample("NavigatorSimplified");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "findType");
        NameExpr refToT = Navigator.findNameExpression(method, "t").get();

        TypeSolver typeSolver = new ReflectionTypeSolver();
        JavaParserFacade javaParserFacade = JavaParserFacade.get(typeSolver);
        ResolvedType ref = javaParserFacade.getType(refToT);

        assertEquals("? super java.lang.String", ref.describe());
    }

    @Test
    public void resolveReferenceToLambdaParamSimplified() {
        CompilationUnit cu = parseSample("NavigatorSimplified");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "findType");
        MethodCallExpr call = Navigator.findMethodCall(method, "isEmpty").get();

        TypeSolver typeSolver = new ReflectionTypeSolver();
        SymbolSolver symbolSolver = new SymbolSolver(typeSolver);
        MethodUsage ref = symbolSolver.solveMethod("isEmpty", Collections.emptyList(), call);

        assertEquals("isEmpty", ref.getName());
        assertEquals("java.lang.String", ref.declaringType().getQualifiedName());
    }

    @Test
    public void resolveGenericReturnTypeOfMethodInJar() throws ParseException, IOException {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "findType");
        MethodCallExpr call = Navigator.findMethodCall(method, "getTypes").get();

        String pathToJar = adaptPath("src/test/resources/javaparser-core-2.1.0.jar");
        TypeSolver typeSolver = new CombinedTypeSolver(new ReflectionTypeSolver(), new JarTypeSolver(pathToJar));
        MethodUsage methodUsage = JavaParserFacade.get(typeSolver).solveMethodAsUsage(call);

        assertEquals("getTypes", methodUsage.getName());
        assertEquals("java.util.List<com.github.javaparser.ast.body.TypeDeclaration>", methodUsage.returnType().describe());
        assertEquals(1, methodUsage.returnType().asReferenceType().typeParametersValues().size());
        assertEquals("com.github.javaparser.ast.body.TypeDeclaration", methodUsage.returnType().asReferenceType().typeParametersValues().get(0).describe());
    }

    @Test
    public void resolveTypeUsageOfFirstMethodInGenericClass() throws ParseException, IOException {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "findType");
        MethodCallExpr callToGetTypes = Navigator.findMethodCall(method, "getTypes").get();

        String pathToJar = adaptPath("src/test/resources/javaparser-core-2.1.0.jar");
        TypeSolver typeSolver = new CombinedTypeSolver(new ReflectionTypeSolver(), new JarTypeSolver(pathToJar));
        MethodUsage filterUsage = JavaParserFacade.get(typeSolver).solveMethodAsUsage(callToGetTypes);

        assertEquals("java.util.List<com.github.javaparser.ast.body.TypeDeclaration>", filterUsage.returnType().describe());
        assertEquals(1, filterUsage.returnType().asReferenceType().typeParametersValues().size());
        assertEquals("com.github.javaparser.ast.body.TypeDeclaration", filterUsage.returnType().asReferenceType().typeParametersValues().get(0).describe());
    }

    @Test
    public void resolveTypeUsageOfMethodInGenericClass() throws ParseException, IOException {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "findType");
        MethodCallExpr callToStream = Navigator.findMethodCall(method, "stream").get();

        String pathToJar = adaptPath("src/test/resources/javaparser-core-2.1.0.jar");
        TypeSolver typeSolver = new CombinedTypeSolver(new ReflectionTypeSolver(), new JarTypeSolver(pathToJar));
        MethodUsage filterUsage = JavaParserFacade.get(typeSolver).solveMethodAsUsage(callToStream);

        assertEquals("java.util.stream.Stream<com.github.javaparser.ast.body.TypeDeclaration>", filterUsage.returnType().describe());
    }

    @Test
    public void resolveTypeUsageOfCascadeMethodInGenericClass() throws ParseException, IOException {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "findType");
        MethodCallExpr callToFilter = Navigator.findMethodCall(method, "filter").get();

        String pathToJar = adaptPath("src/test/resources/javaparser-core-2.1.0.jar");
        TypeSolver typeSolver = new CombinedTypeSolver(new ReflectionTypeSolver(), new JarTypeSolver(pathToJar));
        MethodUsage filterUsage = JavaParserFacade.get(typeSolver).solveMethodAsUsage(callToFilter);

        assertEquals("java.util.stream.Stream<com.github.javaparser.ast.body.TypeDeclaration>", filterUsage.returnType().describe());
    }

    @Test
    public void resolveLambdaType() throws ParseException, IOException {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "findType");
        MethodCallExpr callToFilter = Navigator.findMethodCall(method, "filter").get();
        Expression lambdaExpr = callToFilter.getArguments().get(0);

        String pathToJar = adaptPath("src/test/resources/javaparser-core-2.1.0.jar");
        TypeSolver typeSolver = new CombinedTypeSolver(new ReflectionTypeSolver(), new JarTypeSolver(pathToJar));
        ResolvedType typeOfLambdaExpr = JavaParserFacade.get(typeSolver).getType(lambdaExpr);

        assertEquals("java.util.function.Predicate<? super com.github.javaparser.ast.body.TypeDeclaration>", typeOfLambdaExpr.describe());
    }

    @Test
    public void resolveReferenceToLambdaParam() throws ParseException, IOException {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "findType");
        MethodCallExpr callToGetName = Navigator.findMethodCall(method, "getName").get();
        Expression referenceToT = callToGetName.getScope().get();

        String pathToJar = adaptPath("src/test/resources/javaparser-core-2.1.0.jar");
        TypeSolver typeSolver = new CombinedTypeSolver(new ReflectionTypeSolver(), new JarTypeSolver(pathToJar));
        ResolvedType typeOfT = JavaParserFacade.get(typeSolver).getType(referenceToT);

        assertEquals("? super com.github.javaparser.ast.body.TypeDeclaration", typeOfT.describe());
    }

    @Test
    public void resolveReferenceToCallOnLambdaParam() throws ParseException, IOException {
        CompilationUnit cu = parseSample("Navigator");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Navigator");
        MethodDeclaration method = Navigator.demandMethod(clazz, "findType");
        MethodCallExpr callToGetName = Navigator.findMethodCall(method, "getName").get();

        String pathToJar = adaptPath("src/test/resources/javaparser-core-2.1.0.jar");
        TypeSolver typeSolver = new CombinedTypeSolver(new ReflectionTypeSolver(), new JarTypeSolver(pathToJar));
        MethodUsage methodUsage = JavaParserFacade.get(typeSolver).solveMethodAsUsage(callToGetName);

        assertEquals("getName", methodUsage.getName());
        assertEquals("com.github.javaparser.ast.body.TypeDeclaration", methodUsage.declaringType().getQualifiedName());
    }

    @Test
    public void resolveReferenceToOverloadMethodWithNullParam() {
        CompilationUnit cu = parseSample("OverloadedMethods");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "OverloadedMethods");
        MethodDeclaration method = Navigator.demandMethod(clazz, "m1");
        MethodCallExpr call = Navigator.findMethodCall(method, "overloaded").get();

        ReflectionTypeSolver typeSolver = new ReflectionTypeSolver();
        MethodUsage ref = JavaParserFacade.get(typeSolver).solveMethodAsUsage(call);

        assertEquals("overloaded", ref.getName());
        assertEquals(1, ref.getNoParams());
        assertEquals("java.lang.String", ref.getParamTypes().get(0).describe());
    }

    @Test
    public void resolveReferenceToOverloadMethodFindStricter() {
        CompilationUnit cu = parseSample("OverloadedMethods");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "OverloadedMethods");
        MethodDeclaration method = Navigator.demandMethod(clazz, "m2");
        MethodCallExpr call = Navigator.findMethodCall(method, "overloaded").get();

        ReflectionTypeSolver typeSolver = new ReflectionTypeSolver();
        MethodUsage ref = JavaParserFacade.get(typeSolver).solveMethodAsUsage(call);

        assertEquals("overloaded", ref.getName());
        assertEquals(1, ref.getNoParams());
        assertEquals("java.lang.String", ref.getParamTypes().get(0).describe());
    }

    @Test
    public void resolveInheritedMethodFromInterface() {
        CompilationUnit cu = parseSample("InterfaceInheritance");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "Test");
        MethodDeclaration method = Navigator.demandMethod(clazz, "test");
        MethodCallExpr call = Navigator.findMethodCall(method, "foobar").get();

        File src = adaptPath(new File("src/test/resources"));
        TypeSolver typeSolver = new CombinedTypeSolver(new ReflectionTypeSolver(), new JavaParserTypeSolver(src));
        ResolvedType type = JavaParserFacade.get(typeSolver).getType(call);

        assertEquals("double", type.describe());
    }

    @Test
    public void resolveReferenceToOverloadMethodFindOnlyCompatible() {
        CompilationUnit cu = parseSample("OverloadedMethods");
        com.github.javaparser.ast.body.ClassOrInterfaceDeclaration clazz = Navigator.demandClass(cu, "OverloadedMethods");
        MethodDeclaration method = Navigator.demandMethod(clazz, "m3");
        MethodCallExpr call = Navigator.findMethodCall(method, "overloaded").get();

        ReflectionTypeSolver typeSolver = new ReflectionTypeSolver();
        MethodUsage ref = JavaParserFacade.get(typeSolver).solveMethodAsUsage(call);

        assertEquals("overloaded", ref.getName());
        assertEquals(1, ref.getNoParams());
        assertEquals("java.lang.Object", ref.getParamTypes().get(0).describe());
    }

}