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Issue #58: added some code coverage for Main
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157 changes: 157 additions & 0 deletions
157
src/test/java/com/github/checkstyle/regression/MainTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| //////////////////////////////////////////////////////////////////////////////// | ||
| // checkstyle: Checks Java source code for adherence to a set of rules. | ||
| // Copyright (C) 2001-2017 the original author or authors. | ||
| // | ||
| // This library is free software; you can redistribute it and/or | ||
| // modify it under the terms of the GNU Lesser General Public | ||
| // License as published by the Free Software Foundation; either | ||
| // version 2.1 of the License, or (at your option) any later version. | ||
| // | ||
| // This library is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| // Lesser General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Lesser General Public | ||
| // License along with this library; if not, write to the Free Software | ||
| // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| //////////////////////////////////////////////////////////////////////////////// | ||
|
|
||
| package com.github.checkstyle.regression; | ||
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||
| import static com.github.checkstyle.regression.internal.TestUtils.assertUtilsClassHasPrivateConstructor; | ||
| import static org.junit.Assert.assertEquals; | ||
| import static org.junit.Assert.fail; | ||
|
|
||
| import java.io.File; | ||
| import java.util.Locale; | ||
|
|
||
| import org.junit.Rule; | ||
| import org.junit.Test; | ||
| import org.junit.contrib.java.lang.system.ExpectedSystemExit; | ||
| import org.junit.contrib.java.lang.system.SystemErrRule; | ||
| import org.junit.contrib.java.lang.system.SystemOutRule; | ||
| import org.junit.rules.TemporaryFolder; | ||
|
|
||
| public final class MainTest { | ||
| private static final String USAGE = String.format(Locale.ROOT, | ||
| "usage: java -jar regression-tool.jar -r <arg> -p <arg> [-t <arg>]%n" | ||
| + " [--stopAfterConfigGeneration]%n" | ||
| + " -r,--checkstyleRepoPath <arg> the path of the checkstyle repository%n" | ||
| + " -p,--patchBranch <arg> the name of the PR branch%n" | ||
| + " -t,--checkstyleTesterPath <arg> the path of the checkstyle-tester%n" | ||
| + " directory%n" | ||
| + " --stopAfterConfigGeneration indicates that regression tool would%n" | ||
| + " stop after generating config%n"); | ||
|
|
||
| private static final String EOL = System.getProperty("line.separator"); | ||
|
|
||
| @Rule | ||
| public final TemporaryFolder temporaryFolder = new TemporaryFolder(); | ||
| @Rule | ||
| public final ExpectedSystemExit exit = ExpectedSystemExit.none(); | ||
| @Rule | ||
| public final SystemErrRule systemErr = new SystemErrRule().enableLog().mute(); | ||
| @Rule | ||
| public final SystemOutRule systemOut = new SystemOutRule().enableLog().mute(); | ||
|
|
||
| @Test | ||
| public void testIsProperUtilsClass() throws Exception { | ||
| assertUtilsClassHasPrivateConstructor(Main.class); | ||
| } | ||
|
|
||
| @Test | ||
| public void testNoArguments() throws Exception { | ||
| exit.expectSystemExitWithStatus(-1); | ||
| exit.checkAssertionAfterwards(() -> { | ||
| assertEquals("Unexpected ouput log", USAGE, systemOut.getLog()); | ||
| assertEquals("Unexpected system error log", "Missing required options: r, p" + EOL, | ||
| systemErr.getLog()); | ||
| }); | ||
| Main.main(); | ||
| } | ||
|
|
||
| @Test | ||
| public void testRepoNonExistent() throws Exception { | ||
| try { | ||
| Main.main("-r", "BAD", "-p", "BAD"); | ||
| fail("Exception is expected"); | ||
| } | ||
| catch (IllegalArgumentException ex) { | ||
| assertEquals("Invalid error message", | ||
| "path of local git repo must exist and be a directory", | ||
| ex.getLocalizedMessage()); | ||
| } | ||
| } | ||
|
|
||
| @Test | ||
| public void testRepoEmpty() throws Exception { | ||
| try { | ||
| Main.main("-r", "", "-p", "BAD"); | ||
| fail("Exception is expected"); | ||
| } | ||
| catch (IllegalArgumentException ex) { | ||
| assertEquals("Invalid error message", | ||
| "path of local git repo must exist and be a directory", | ||
| ex.getLocalizedMessage()); | ||
| } | ||
| } | ||
|
|
||
| @Test | ||
| public void testRepoFile() throws Exception { | ||
| try { | ||
| final File file = temporaryFolder.newFile(); | ||
| Main.main("-r", file.getCanonicalPath(), "-p", "BAD"); | ||
| fail("Exception is expected"); | ||
| } | ||
| catch (IllegalArgumentException ex) { | ||
| assertEquals("Invalid error message", | ||
| "path of local git repo must exist and be a directory", | ||
| ex.getLocalizedMessage()); | ||
| } | ||
| } | ||
|
|
||
| @Test | ||
| public void testMissingTester() throws Exception { | ||
| try { | ||
| final File directory = temporaryFolder.newFolder(); | ||
| Main.main("-r", directory.getCanonicalPath(), "-p", "BAD"); | ||
| fail("Exception is expected"); | ||
| } | ||
| catch (IllegalArgumentException ex) { | ||
| assertEquals("Invalid error message", | ||
| "missing checkstyleTesterPath, which is required if you are not using" | ||
| + " --stopAfterConfigGeneration mode", ex.getLocalizedMessage()); | ||
| } | ||
| } | ||
|
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||
| @Test | ||
| public void testTesterNonExistent() throws Exception { | ||
| try { | ||
| final File directory = temporaryFolder.newFolder(); | ||
| Main.main("-r", directory.getCanonicalPath(), "-t", "BAD", "-p", "BAD"); | ||
| fail("Exception is expected"); | ||
| } | ||
| catch (IllegalArgumentException ex) { | ||
| assertEquals("Invalid error message", | ||
| "path of checkstyle tester must exist and be a directory", | ||
| ex.getLocalizedMessage()); | ||
| } | ||
| } | ||
|
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||
| @Test | ||
| public void testTesterFile() throws Exception { | ||
| try { | ||
| final File directory = temporaryFolder.newFolder(); | ||
| final File file = temporaryFolder.newFile(); | ||
| Main.main("-r", directory.getCanonicalPath(), "-t", file.getCanonicalPath(), "-p", | ||
| "BAD"); | ||
| fail("Exception is expected"); | ||
| } | ||
| catch (IllegalArgumentException ex) { | ||
| assertEquals("Invalid error message", | ||
| "path of checkstyle tester must exist and be a directory", | ||
| ex.getLocalizedMessage()); | ||
| } | ||
| } | ||
| } |