/*
* Copyright 2011 Google Inc. All Rights Reserved.
*
* 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.google.errorprone.matchers;
import static org.junit.Assert.assertTrue;
import com.google.errorprone.Scanner;
import com.google.errorprone.VisitorState;
import com.sun.source.tree.ExpressionTree;
import com.sun.source.tree.MemberSelectTree;
import com.sun.source.tree.Tree.Kind;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* @author eaftan@google.com (Eddie Aftandilian
*/
@RunWith(JUnit4.class)
public class InstanceMethodTest extends CompilerBasedAbstractTest {
@Test
public void shouldMatch() {
writeFile("A.java",
"public class A {",
" public int getHash() {",
" int[] arr = new int[10];",
" return arr.hashCode();",
" }",
"}"
);
assertCompiles(memberSelectMatches(true, new InstanceMethod(
Matchers.<ExpressionTree>isArrayType(), "hashCode")));
}
@Test
public void shouldMatchWildCard() {
writeFile("A.java",
"public class A {",
" public int getHash() {",
" int[] arr = new int[10];",
" return arr.hashCode();",
" }",
"}"
);
assertCompiles(memberSelectMatches(
true, InstanceMethod.methodReceiverMatcher(Matchers.<ExpressionTree>isArrayType())));
}
@Test
public void shouldNotMatchWhenMethodNamesDiffer() {
writeFile("A.java",
"public class A {",
" public int getHash() {",
" int[] arr = new int[10];",
" return arr.hashCode();",
" }",
"}"
);
assertCompiles(memberSelectMatches(false, new InstanceMethod(
Matchers.<ExpressionTree>isArrayType(), "notHashCode")));
}
@Test
public void shouldNotMatchWhenMatcherFails() {
writeFile("A.java",
"public class A {",
" public int getHash() {",
" Object obj = new Object();",
" return obj.hashCode();",
" }",
"}"
);
assertCompiles(memberSelectMatches(false, new InstanceMethod(
Matchers.<ExpressionTree>isArrayType(), "hashCode")));
}
@Test
public void shouldNotMatchStaticMethod() {
writeFile("A.java",
"package com.google;",
"public class A { ",
" public static int count() {",
" return 1;",
" }",
"}"
);
writeFile("B.java",
"import com.google.A;",
"public class B {",
" public int count() {",
" return A.count();",
" }",
"}"
);
assertCompiles(memberSelectMatches(false, new InstanceMethod(
Matchers.<ExpressionTree>anything(), "count")));
}
private Scanner memberSelectMatches(final boolean shouldMatch, final InstanceMethod toMatch) {
return new Scanner() {
@Override
public Void visitMemberSelect(MemberSelectTree node, VisitorState visitorState) {
if (getCurrentPath().getParentPath().getLeaf().getKind() == Kind.METHOD_INVOCATION) {
assertTrue(node.toString(),
!shouldMatch ^ toMatch.matches(node, visitorState));
}
return super.visitMemberSelect(node, visitorState);
}
};
}
}