/*
* Copyright 2013 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 com.google.errorprone.matchers.ChildMultiMatcher.MatchType.ALL;
import static com.google.errorprone.matchers.ChildMultiMatcher.MatchType.AT_LEAST_ONE;
import static com.google.errorprone.matchers.Matchers.isPrimitiveType;
import static com.google.errorprone.matchers.Matchers.variableType;
import static org.junit.Assert.assertEquals;
import com.google.errorprone.VisitorState;
import com.google.errorprone.scanner.Scanner;
import com.sun.source.tree.MethodTree;
import java.util.ArrayList;
import java.util.List;
import org.junit.After;
import org.junit.Before;
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 MethodHasParametersTest extends CompilerBasedAbstractTest {
final List<ScannerTest> tests = new ArrayList<ScannerTest>();
@Before
public void setUp() {
tests.clear();
writeFile("SampleAnnotation1.java",
"package com.google;",
"public @interface SampleAnnotation1 {}"
);
writeFile("SampleAnnotation2.java",
"package com.google;",
"public @interface SampleAnnotation2 {}"
);
}
@After
public void tearDown() {
for (ScannerTest test : tests) {
test.assertDone();
}
}
@Test
public void shouldMatchSingleParameter() {
writeFile("A.java",
"package com.google;",
"public class A {",
" public void A(int i) {}",
"}");
assertCompiles(methodMatches(true, new MethodHasParameters(AT_LEAST_ONE, variableType(
isPrimitiveType()))));
assertCompiles(methodMatches(true, new MethodHasParameters(ALL, variableType(
isPrimitiveType()))));
}
@Test
public void shouldNotMatchNoParameters() {
writeFile("A.java",
"package com.google;",
"public class A {",
" public void A() {}",
"}");
assertCompiles(methodMatches(false, new MethodHasParameters(AT_LEAST_ONE, variableType(
isPrimitiveType()))));
assertCompiles(methodMatches(true, new MethodHasParameters(ALL, variableType(
isPrimitiveType()))));
}
@Test
public void shouldNotMatchNonmatchingParameter() {
writeFile("A.java",
"package com.google;",
"public class A {",
" public void A(Object obj) {}",
"}");
assertCompiles(methodMatches(false, new MethodHasParameters(AT_LEAST_ONE, variableType(
isPrimitiveType()))));
assertCompiles(methodMatches(false, new MethodHasParameters(ALL, variableType(
isPrimitiveType()))));
}
@Test
public void testMultipleParameters() {
writeFile("A.java",
"package com.google;",
"public class A {",
" public void A(int i, Object obj) {}",
"}");
assertCompiles(methodMatches(true, new MethodHasParameters(AT_LEAST_ONE, variableType(
isPrimitiveType()))));
assertCompiles(methodMatches(false, new MethodHasParameters(ALL, variableType(
isPrimitiveType()))));
}
private abstract class ScannerTest extends Scanner {
public abstract void assertDone();
}
private Scanner methodMatches(final boolean shouldMatch, final MethodHasParameters toMatch) {
ScannerTest test = new ScannerTest() {
private boolean matched = false;
@Override
public Void visitMethod(MethodTree node, VisitorState visitorState) {
visitorState = visitorState.withPath(getCurrentPath());
if (!isConstructor(node) && toMatch.matches(node, visitorState)) {
matched = true;
}
return super.visitMethod(node, visitorState);
}
private boolean isConstructor(MethodTree node) {
return node.getName().contentEquals("<init>");
}
@Override
public void assertDone() {
assertEquals(matched, shouldMatch);
}
};
tests.add(test);
return test;
}
}