/*
* Copyright 2016 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.bugpatterns;
import com.google.errorprone.CompilationTestHelper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** {@link InfiniteRecursion}Test */
@RunWith(JUnit4.class)
public class InfiniteRecursionTest {
private final CompilationTestHelper compilationHelper =
CompilationTestHelper.newInstance(InfiniteRecursion.class, getClass());
@Test
public void positive() {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" void f(int x) {}",
" void f() {",
" // BUG: Diagnostic contains:",
" f();",
" }",
" int g() {",
" return 0;",
" }",
" int g(int x) {",
" // BUG: Diagnostic contains:",
" return g(x);",
" }",
"}")
.doTest();
}
@Test
public void negative() {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" void f(int x) {}",
" void f() {",
" f(42);",
" }",
" int g() {",
" return 0;",
" }",
" int g(int x) {",
" return x == 0 ? g() : g(x - 1);",
" }",
"}")
.doTest();
}
@Test
public void negativeDelegate() {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" Test test;",
" void f() {",
" test.f();",
" }",
"}")
.doTest();
}
@Test
public void positiveGeneric() {
compilationHelper
.addSourceLines(
"Test.java",
"class Test<X> {",
" <T> void f(T x) {",
" // BUG: Diagnostic contains:",
" this.<String>f(\"\");",
" }",
" void g(X x) {",
" // BUG: Diagnostic contains:",
" g(null);",
" }",
"}")
.doTest();
}
@Test
public void overload() {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" public void f (String s) {",
" f((Object) s);",
" }",
" public void f (Object o) {",
" // BUG: Diagnostic contains:",
" f(o);",
" }",
"}")
.doTest();
}
@Test
public void abstractMethod() {
compilationHelper
.addSourceLines(
"Test.java", //
"abstract class Test {",
" abstract void f ();",
"}")
.doTest();
}
}