/*
* Copyright 2012 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.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** {@link ClassCanBeStatic}Test */
@RunWith(JUnit4.class)
public class ClassCanBeStaticTest {
private CompilationTestHelper compilationHelper;
@Before
public void setUp() {
compilationHelper = CompilationTestHelper.newInstance(ClassCanBeStatic.class, getClass());
}
@Test
public void testNegativeCase() throws Exception {
compilationHelper.addSourceFile("ClassCanBeStaticNegativeCases.java").doTest();
}
@Test
public void testPositiveCase1() throws Exception {
compilationHelper.addSourceFile("ClassCanBeStaticPositiveCase1.java").doTest();
}
@Test
public void testPositiveCase2() throws Exception {
compilationHelper.addSourceFile("ClassCanBeStaticPositiveCase2.java").doTest();
}
@Test
public void testPositiveCase3() throws Exception {
compilationHelper.addSourceFile("ClassCanBeStaticPositiveCase3.java").doTest();
}
@Test
public void positiveReference() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" // BUG: Diagnostic contains:",
" private class One { int field; }",
" // BUG: Diagnostic contains:",
" private class Two { String field; }",
"}")
.doTest();
}
@Test
public void nonMemberField() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" int x;",
" private class One {",
" {",
" System.err.println(x);",
" }",
" }",
" // BUG: Diagnostic contains:",
" private class Two {",
" void f(Test t) {",
" System.err.println(t.x);",
" }",
" }",
"}")
.doTest();
}
@Test
public void qualifiedThis() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" private class One {",
" {",
" System.err.println(Test.this);",
" }",
" }",
" // BUG: Diagnostic contains:",
" private class Two {",
" void f(Test t) {",
" System.err.println(Test.class);",
" }",
" }",
"}")
.doTest();
}
@Test
public void referencesSibling() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" private class One {",
" {",
" new Two();",
" }",
" }",
" private class Two {",
" void f(Test t) {",
" System.err.println(Test.this);",
" }",
" }",
"}")
.doTest();
}
@Test
public void referenceInAnonymousClass() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" private class Two {",
" {",
" new Runnable() {",
" @Override public void run() {",
" System.err.println(Test.this);",
" }",
" }.run();",
" }",
" }",
"}")
.doTest();
}
@Test
public void extendsInnerClass() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" private class One {",
" {",
" System.err.println(Test.this);",
" }",
" }",
" private class Two extends One {",
" }",
"}")
.doTest();
}
@Test
public void ctorParametricInnerClass() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" private class One<T> {",
" {",
" System.err.println(Test.this);",
" }",
" }",
" private abstract class Two {",
" {",
" new One<String>();",
" }",
" }",
"}")
.doTest();
}
@Test
public void extendsParametricInnerClass() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" private class One<T> {",
" {",
" System.err.println(Test.this);",
" }",
" }",
" private abstract class Two<T> extends One<T> {}",
"}")
.doTest();
}
@Test
public void referencesTypeParameter() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"import java.util.List;",
"class Test<T> {",
" private class One {",
" List<T> xs;",
" }",
"}")
.doTest();
}
@Test
public void referencesTypeParameterImplicit() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"import java.util.List;",
"class Test<T> {",
" class One {",
" {",
" System.err.println(Test.this);",
" }",
" }",
" class Two {",
" One one; // implicit reference of Test<T>.One",
" }",
"}")
.doTest();
}
@Test
public void negative_referencesTypeParameterImplicit() throws Exception {
compilationHelper
.addSourceLines(
"One.java",
"package test;",
"public class One<T> {",
" public class Inner {",
" {",
" System.err.println(One.this);",
" }",
" }",
"}")
.addSourceLines(
"Test.java",
"import test.One.Inner;",
"class Test {",
" // BUG: Diagnostic contains:",
" class Two {",
" Inner inner; // ok: implicit reference of One.Inner",
" }",
"}")
.doTest();
}
@Test
public void qualifiedSuperReference() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" class One {",
" {",
" Test.super.getClass();",
" }",
" }",
"}")
.doTest();
}
@Test
public void annotationMethod() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" // BUG: Diagnostic contains:",
" class One {",
" @SuppressWarnings(value = \"\")",
" void f() {}",
" }",
"}")
.doTest();
}
@Test
public void extendsHiddenInnerClass() throws Exception {
compilationHelper
.addSourceLines(
"A.java", //
"public class A {",
" public class Inner {",
" {",
" System.err.println(A.this);",
" }",
" }",
"}")
.addSourceLines(
"B.java", //
"public class B extends A {",
" public class Inner extends A.Inner {}",
"}")
.doTest();
}
@Test
public void nestedInAnonymous() throws Exception {
compilationHelper
.addSourceLines(
"A.java", //
"public class A {",
" static Runnable r =",
" new Runnable() {",
" class Inner {",
" }",
" public void run() {}",
" };",
"}")
.doTest();
}
@Test
public void nestedInLocal() throws Exception {
compilationHelper
.addSourceLines(
"A.java", //
"public class A {",
" static void f() {",
" class Outer {",
" class Inner {",
" }",
" }",
" }",
"}")
.doTest();
}
}