springTest.tests.Assume.java Source code

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Here is the source code for springTest.tests.Assume.java

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package springTest.tests;

/*
 * Copyright 2002-2015 the original author or 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.
 */

import static org.junit.Assume.assumeFalse;

import java.awt.GraphicsEnvironment;
import java.lang.reflect.Method;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.junit.AssumptionViolatedException;
import org.springframework.util.ClassUtils;

/**
 * Provides utility methods that allow JUnit tests to {@link org.junit.Assume} certain
 * conditions hold {@code true}. If the assumption fails, it means the test should be
 * skipped.
 *
 * <p>For example, if a set of tests require at least JDK 1.7 it can use
 * {@code Assume#atLeast(JavaVersion.JAVA_17)} as shown below:
 *
 * <pre class="code">
 * public void MyTests {
 *
 *   &#064;BeforeClass
 *   public static void assumptions() {
 *       Assume.atLeast(JavaVersion.JAVA_17);
 *   }
 *
 *   // ... all the test methods that require at least JDK 1.7
 * }
 * </pre>
 *
 * If only a single test requires at least JDK 1.7 it can use the
 * {@code Assume#atLeast(JavaVersion.JAVA_17)} as shown below:
 *
 * <pre class="code">
 * public void MyTests {
 *
 *   &#064;Test
 *   public void requiresJdk17 {
 *       Assume.atLeast(JavaVersion.JAVA_17);
 *       // ... perform the actual test
 *   }
 * }
 * </pre>
 *
 * In addition to assumptions based on the JDK version, tests can be categorized into
 * {@link TestGroup}s. Active groups are enabled using the 'testGroups' system property,
 * usually activated from the gradle command line:
 * <pre>
 * gradle test -PtestGroups="performance"
 * </pre>
 *
 * Groups can be specified as a comma separated list of values, or using the pseudo group
 * 'all'. See {@link TestGroup} for a list of valid groups.
 *
 * @author Rob Winch
 * @author Phillip Webb
 * @author Sam Brannen
 * @since 3.2
 * @see #atLeast(JavaVersion)
 * @see #group(TestGroup)
 * @see #group(TestGroup, Executable)
 */
public abstract class Assume {

    private static final Set<TestGroup> GROUPS = TestGroup.parse(System.getProperty("testGroups"));

    /**
     * Assume that a minimum {@link JavaVersion} is running.
     * @param version the minimum version for the test to run
     * @throws AssumptionViolatedException if the assumption fails
     */
    public static void atLeast(JavaVersion version) {
        if (!JavaVersion.runningVersion().isAtLeast(version)) {
            throw new AssumptionViolatedException(
                    "Requires JDK " + version + " but running " + JavaVersion.runningVersion());
        }
    }

    /**
     * Assume that a particular {@link TestGroup} has been specified.
     * @param group the group that must be specified
     * @throws AssumptionViolatedException if the assumption fails
     */
    public static void group(TestGroup group) {
        if (!GROUPS.contains(group)) {
            throw new AssumptionViolatedException("Requires unspecified group " + group + " from " + GROUPS);
        }
    }

    /**
     * Assume that a particular {@link TestGroup} has been specified before
     * executing the supplied {@link Executable}.
     * <p>If the assumption fails, the executable will not be executed, but
     * no {@link AssumptionViolatedException} will be thrown.
     * @param group the group that must be specified
     * @param executable the executable to execute if the test group is active
     * @since 4.2
     */
    public static void group(TestGroup group, Executable executable) throws Exception {
        if (GROUPS.contains(group)) {
            executable.execute();
        }
    }

    /**
     * Assume that the specified log is not set to Trace or Debug.
     * @param log the log to test
     * @throws AssumptionViolatedException if the assumption fails
     */
    public static void notLogging(Log log) {
        assumeFalse(log.isTraceEnabled());
        assumeFalse(log.isDebugEnabled());
    }

    /**
     * Assume that we can load fonts.
     * <p>See <a href="https://java.net/jira/browse/MACOSX_PORT-355">MACOSX_PORT-355</a>
     * issue.
     * @throws AssumptionViolatedException if the assumption fails
     */
    public static void canLoadNativeDirFonts() {
        try {
            GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
            Class<?> parserClass = ClassUtils.forName("net.sf.jasperreports.engine.util.JRStyledTextParser",
                    Assume.class.getClassLoader());
            Method method = parserClass.getMethod("getInstance");
            method.setAccessible(true);
            method.invoke(null);
        } catch (Throwable ex) {
            throw new AssumptionViolatedException("Requires GraphicsEnvironment that can load fonts", ex);
        }
    }

    /**
     * @since 4.2
     */
    @FunctionalInterface
    public static interface Executable {
        void execute() throws Exception;
    }

}