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MathRoundIntLongTest.java
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MathRoundIntLongTest.java
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/*
* Copyright 2018 The Error Prone Authors.
*
* 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.BugCheckerRefactoringTestHelper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for {@link MathRoundIntLong}. */
@RunWith(JUnit4.class)
public class MathRoundIntLongTest {
private final BugCheckerRefactoringTestHelper helper =
BugCheckerRefactoringTestHelper.newInstance(new MathRoundIntLong(), getClass());
@Test
public void deleteRoundMethodInt() throws Exception {
helper
.addInputLines(
"Test.java", //
"class Test {",
" void f() {",
" int y = Math.round(3);",
" }",
"}")
.addOutputLines(
"Test.java", //
"class Test {",
" void f() {",
" int y = 3;",
" }",
"}")
.doTest();
}
@Test
public void deleteRoundMethodIntClass() throws Exception {
helper
.addInputLines(
"Test.java", //
"class Test {",
" void f() {",
" Integer i = new Integer(3);",
" int y = Math.round(i);",
" }",
"}")
.addOutputLines(
"Test.java", //
"class Test {",
" void f() {",
" Integer i = new Integer(3);",
" int y = i;",
" }",
"}")
.doTest();
}
@Test
public void replaceRoundMethodLong() throws Exception {
helper
.addInputLines(
"Test.java", //
"class Test {",
" void f() {",
" long l = 3L;",
" int y = Math.round(l);",
" }",
"}")
.addOutputLines(
"Test.java", //
"import com.google.common.primitives.Ints;",
"class Test {",
" void f() {",
" long l = 3L;",
" int y = Ints.saturatedCast(l);",
" }",
"}")
.doTest();
}
@Test
public void replaceRoundMethodLongClass() throws Exception {
helper
.addInputLines(
"Test.java", //
"class Test {",
" void f() {",
" Long l = new Long(\"3\");",
" int y = Math.round(l);",
" }",
"}")
.addOutputLines(
"Test.java", //
"import com.google.common.primitives.Ints;",
"class Test {",
" void f() {",
" Long l = new Long(\"3\");",
" int y = Ints.saturatedCast(l);",
" }",
"}")
.doTest();
}
@Test
public void roundingFloatNegative() throws Exception {
helper
.addInputLines(
"Test.java", //
"class Test {",
" void f() {",
" Float f = new Float(\"3\");",
" int y = Math.round(f);",
" }",
"}")
.expectUnchanged()
.doTest();
}
@Test
public void roundingDoubleNegative() throws Exception {
helper
.addInputLines(
"Test.java", //
"class Test {",
" void f() {",
" Double d = new Double(\"3\");",
" Long y = Math.round(d);",
" }",
"}")
.expectUnchanged()
.doTest();
}
@Test
public void replaceRoundMethodAddParenthesis() throws Exception {
helper
.addInputLines(
"Test.java", //
"import com.google.common.primitives.Ints;",
"class Test {",
" void f() {",
" long l = 3L;",
" long x = 6L;",
" int y = Math.round(l/x);",
" }",
"}")
.addOutputLines(
"Test.java", //
"import com.google.common.primitives.Ints;",
"class Test {",
" void f() {",
" long l = 3L;",
" long x = 6L;",
" int y = Ints.saturatedCast(l/x);",
" }",
"}")
.doTest();
}
}