/
AssertTrueNegationToAssertFalse.java
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/
AssertTrueNegationToAssertFalse.java
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/*
* Copyright 2022 the original author or authors.
* <p>
* 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
* <p>
* https://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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 org.openrewrite.java.testing.cleanup;
import org.openrewrite.ExecutionContext;
import org.openrewrite.Recipe;
import org.openrewrite.TreeVisitor;
import org.openrewrite.java.JavaParser;
import org.openrewrite.java.JavaTemplate;
import org.openrewrite.java.JavaVisitor;
import org.openrewrite.java.MethodMatcher;
import org.openrewrite.java.tree.J;
public class AssertTrueNegationToAssertFalse extends Recipe {
private static final MethodMatcher ASSERT_TRUE = new MethodMatcher(
"org.junit.jupiter.api.Assertions assertTrue(..)");
@Override
public String getDisplayName() {
return "Replace JUnit `assertTrue(!<boolean>)` to `assertFalse(<boolean>)`";
}
@Override
public String getDescription() {
return "Using `assertFalse` is simpler and more clear.";
}
@Override
public TreeVisitor<?, ExecutionContext> getVisitor() {
return new JavaVisitor<ExecutionContext>() {
JavaParser.Builder<?, ?> javaParser = null;
private JavaParser.Builder<?, ?> javaParser(ExecutionContext ctx) {
if (javaParser == null) {
javaParser = JavaParser.fromJavaVersion()
.classpathFromResources(ctx, "junit-jupiter-api-5.9");
}
return javaParser;
}
@Override
public J.MethodInvocation visitMethodInvocation(J.MethodInvocation method, ExecutionContext ctx) {
J.MethodInvocation mi = (J.MethodInvocation) super.visitMethodInvocation(method, ctx);
if (ASSERT_TRUE.matches(mi) && isUnaryOperatorNot(mi)) {
StringBuilder sb = new StringBuilder();
J.Unary unary = (J.Unary) mi.getArguments().get(0);
if (mi.getSelect() == null) {
maybeRemoveImport("org.junit.jupiter.api.Assertions");
maybeAddImport("org.junit.jupiter.api.Assertions", "assertFalse");
} else {
sb.append("Assertions.");
}
sb.append("assertFalse(#{any(java.lang.Boolean)}");
Object[] args;
if (mi.getArguments().size() == 2) {
args = new Object[]{unary.getExpression(), mi.getArguments().get(1)};
sb.append(", #{any()}");
} else {
args = new Object[]{unary.getExpression()};
}
sb.append(")");
JavaTemplate t;
if (mi.getSelect() == null) {
t = JavaTemplate.builder(sb.toString())
.contextSensitive()
.staticImports("org.junit.jupiter.api.Assertions.assertFalse")
.javaParser(javaParser(ctx))
.build();
} else {
t = JavaTemplate.builder(sb.toString())
.contextSensitive()
.imports("org.junit.jupiter.api.Assertions")
.javaParser(javaParser(ctx))
.build();
}
return t.apply(updateCursor(mi), mi.getCoordinates().replace(), args);
}
return mi;
}
private boolean isUnaryOperatorNot(J.MethodInvocation method) {
if (!method.getArguments().isEmpty() && method.getArguments().get(0) instanceof J.Unary) {
J.Unary unary = (J.Unary) method.getArguments().get(0);
return unary.getOperator().equals(J.Unary.Type.Not);
}
return false;
}
};
}
}