Replace assertFalse/assertTrue for file existence (#52092)

In the packaging tests, we added convenience methods for asserting file
existence and file non-existence. This commit replaces the remaining
uses of assertFalse/assertTrue in favor of these dedicated matchers.

qa/os/src/test/java/org/elasticsearch/packaging/test/ArchiveTests.java

@@ -125,7 +125,7 @@ public class ArchiveTests extends PackagingTestCase {
             ? "gc.log.0.current"
             : "gc.log";
 
-        assertTrue("gc logs exist", Files.exists(installation.logs.resolve(gcLogName)));
+        assertThat(installation.logs.resolve(gcLogName), fileExists());
         ServerUtils.runElasticsearchTests();
 
         stopElasticsearch();

qa/os/src/test/java/org/elasticsearch/packaging/test/DebPreservationTests.java

@@ -25,7 +25,7 @@ import org.junit.BeforeClass;
 import java.nio.file.Paths;
 
 import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileExists;
-import static org.elasticsearch.packaging.util.FileUtils.assertPathsDontExist;
+import static org.elasticsearch.packaging.util.FileUtils.assertPathsDoNotExist;
 import static org.elasticsearch.packaging.util.FileUtils.assertPathsExist;
 import static org.elasticsearch.packaging.util.Packages.SYSVINIT_SCRIPT;
 import static org.elasticsearch.packaging.util.Packages.assertInstalled;
@@ -76,14 +76,14 @@ public class DebPreservationTests extends PackagingTestCase {
 
         // keystore was removed
 
-        assertPathsDontExist(
+        assertPathsDoNotExist(
             installation.config("elasticsearch.keystore"),
             installation.config(".elasticsearch.keystore.initial_md5sum")
         );
 
         // doc files were removed
 
-        assertPathsDontExist(
+        assertPathsDoNotExist(
             Paths.get("/usr/share/doc/" + distribution().flavor.name),
             Paths.get("/usr/share/doc/" + distribution().flavor.name + "/copyright")
         );
@@ -100,7 +100,7 @@ public class DebPreservationTests extends PackagingTestCase {
 
         assertRemoved(distribution());
 
-        assertPathsDontExist(
+        assertPathsDoNotExist(
             installation.config,
             installation.envFile,
             SYSVINIT_SCRIPT

qa/os/src/test/java/org/elasticsearch/packaging/test/PackageTests.java

@@ -38,7 +38,7 @@ import static com.carrotsearch.randomizedtesting.RandomizedTest.getRandom;
 import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileDoesNotExist;
 import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileExists;
 import static org.elasticsearch.packaging.util.FileUtils.append;
-import static org.elasticsearch.packaging.util.FileUtils.assertPathsDontExist;
+import static org.elasticsearch.packaging.util.FileUtils.assertPathsDoNotExist;
 import static org.elasticsearch.packaging.util.FileUtils.assertPathsExist;
 import static org.elasticsearch.packaging.util.FileUtils.cp;
 import static org.elasticsearch.packaging.util.FileUtils.fileWithGlobExist;
@@ -206,7 +206,7 @@ public class PackageTests extends PackagingTestCase {
 
         }
 
-        assertPathsDontExist(
+        assertPathsDoNotExist(
             installation.bin,
             installation.lib,
             installation.modules,

qa/os/src/test/java/org/elasticsearch/packaging/test/PackagingTestCase.java

@@ -52,6 +52,8 @@ import java.nio.file.Paths;
 import static org.elasticsearch.packaging.util.Cleanup.cleanEverything;
 import static org.elasticsearch.packaging.util.Docker.ensureImageIsLoaded;
 import static org.elasticsearch.packaging.util.Docker.removeContainer;
+import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileExists;
+import static org.hamcrest.CoreMatchers.anyOf;
 import static org.hamcrest.CoreMatchers.containsString;
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.junit.Assume.assumeFalse;
@@ -317,7 +319,7 @@ public abstract class PackagingTestCase extends Assert {
 
             // If log file exists, then we have bootstrapped our logging and the
             // error should be in the logs
-            assertTrue("log file exists", Files.exists(installation.logs.resolve("elasticsearch.log")));
+            assertThat(installation.logs.resolve("elasticsearch.log"), fileExists());
             String logfile = FileUtils.slurp(installation.logs.resolve("elasticsearch.log"));
             assertThat(logfile, containsString(expectedMessage));
 

qa/os/src/test/java/org/elasticsearch/packaging/test/RpmPreservationTests.java

@@ -23,14 +23,13 @@ import org.elasticsearch.packaging.util.Distribution;
 import org.elasticsearch.packaging.util.Shell;
 import org.junit.BeforeClass;
 
-import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.stream.Stream;
 
 import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileDoesNotExist;
 import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileExists;
 import static org.elasticsearch.packaging.util.FileUtils.append;
-import static org.elasticsearch.packaging.util.FileUtils.assertPathsDontExist;
+import static org.elasticsearch.packaging.util.FileUtils.assertPathsDoNotExist;
 import static org.elasticsearch.packaging.util.Packages.SYSTEMD_SERVICE;
 import static org.elasticsearch.packaging.util.Packages.SYSVINIT_SCRIPT;
 import static org.elasticsearch.packaging.util.Packages.assertInstalled;
@@ -103,7 +102,7 @@ public class RpmPreservationTests extends PackagingTestCase {
             assertThat(sh.runIgnoreExitCode("systemctl is-enabled elasticsearch.service").exitCode, is(1));
         }
 
-        assertPathsDontExist(
+        assertPathsDoNotExist(
             installation.bin,
             installation.lib,
             installation.modules,
@@ -137,7 +136,7 @@ public class RpmPreservationTests extends PackagingTestCase {
     private void assertConfFilePreserved(String configFile) {
         final Path original = installation.config(configFile);
         final Path saved = installation.config(configFile + ".rpmsave");
-        assertFalse(original + " should not exist", Files.exists(original));
+        assertThat(original, fileDoesNotExist());
-        assertTrue(saved + " should exist", Files.exists(saved));
+        assertThat(saved, fileExists());
     }
 }

qa/os/src/test/java/org/elasticsearch/packaging/util/Archives.java

@@ -29,6 +29,8 @@ import java.util.List;
 import java.util.stream.Stream;
 
 import static java.util.stream.Collectors.joining;
+import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileDoesNotExist;
+import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileExists;
 import static org.elasticsearch.packaging.util.FileMatcher.Fileness.Directory;
 import static org.elasticsearch.packaging.util.FileMatcher.Fileness.File;
 import static org.elasticsearch.packaging.util.FileMatcher.file;
@@ -48,8 +50,6 @@ import static org.hamcrest.collection.IsCollectionWithSize.hasSize;
 import static org.hamcrest.collection.IsEmptyCollection.empty;
 import static org.hamcrest.core.Is.is;
 import static org.hamcrest.core.IsNot.not;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
 
 /**
  * Installation and verification logic for archive distributions
@@ -269,7 +269,7 @@ public class Archives {
     public static Shell.Result runElasticsearchStartCommand(Installation installation, Shell sh, String keystorePassword) {
         final Path pidFile = installation.home.resolve("elasticsearch.pid");
 
-        assertFalse("Pid file doesn't exist when starting Elasticsearch", Files.exists(pidFile));
+        assertThat(pidFile, fileDoesNotExist());
 
         final Installation.Executables bin = installation.executables();
 
@@ -339,14 +339,14 @@ public class Archives {
         final Path pidFile = installation.home.resolve("elasticsearch.pid");
         ServerUtils.waitForElasticsearch(installation);
 
-        assertTrue("Starting Elasticsearch produced a pid file at " + pidFile, Files.exists(pidFile));
+        assertThat("Starting Elasticsearch produced a pid file at " + pidFile, pidFile, fileExists());
         String pid = slurp(pidFile).trim();
         assertThat(pid, is(not(emptyOrNullString())));
     }
 
     public static void stopElasticsearch(Installation installation) throws Exception {
         Path pidFile = installation.home.resolve("elasticsearch.pid");
-        assertTrue("pid file should exist", Files.exists(pidFile));
+        assertThat(pidFile, fileExists());
         String pid = slurp(pidFile).trim();
         assertThat(pid, is(not(emptyOrNullString())));
 

qa/os/src/test/java/org/elasticsearch/packaging/util/FileUtils.java

@@ -52,10 +52,11 @@ import java.util.stream.Stream;
 import java.util.zip.GZIPInputStream;
 import java.util.zip.ZipException;
 
+import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileDoesNotExist;
+import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileExists;
 import static org.hamcrest.Matchers.emptyIterable;
 import static org.hamcrest.core.IsNot.not;
-import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThat;
-import static org.junit.Assert.assertTrue;
 
 /**
  * Wrappers and convenience methods for common filesystem operations
@@ -308,8 +309,8 @@ public class FileUtils {
         return distribution.path;
     }
 
-    public static void assertPathsExist(Path... paths) {
+    public static void assertPathsExist(final Path... paths) {
-        Arrays.stream(paths).forEach(path -> assertTrue(path + " should exist", Files.exists(path)));
+        Arrays.stream(paths).forEach(path -> assertThat(path, fileExists()));
     }
 
     public static Matcher<Path> fileWithGlobExist(String glob) throws IOException {
@@ -326,8 +327,8 @@ public class FileUtils {
         };
     }
 
-    public static void assertPathsDontExist(Path... paths) {
+    public static void assertPathsDoNotExist(final Path... paths) {
-        Arrays.stream(paths).forEach(path -> assertFalse(path + " should not exist", Files.exists(path)));
+        Arrays.stream(paths).forEach(path -> assertThat(path, fileDoesNotExist()));
     }
 
     public static void deleteIfExists(Path path) {

qa/os/src/test/java/org/elasticsearch/packaging/util/Packages.java

@@ -32,6 +32,7 @@ import java.nio.file.StandardOpenOption;
 import java.util.regex.Pattern;
 import java.util.stream.Stream;
 
+import static org.elasticsearch.packaging.util.FileExistenceMatchers.fileDoesNotExist;
 import static org.elasticsearch.packaging.util.FileMatcher.Fileness.Directory;
 import static org.elasticsearch.packaging.util.FileMatcher.Fileness.File;
 import static org.elasticsearch.packaging.util.FileMatcher.file;
@@ -164,7 +165,7 @@ public class Packages {
 
         final Result passwdResult = sh.run("getent passwd elasticsearch");
         final Path homeDir = Paths.get(passwdResult.stdout.trim().split(":")[5]);
-        assertFalse("elasticsearch user home directory must not exist", Files.exists(homeDir));
+        assertThat("elasticsearch user home directory must not exist", homeDir, fileDoesNotExist());
 
         Stream.of(
             es.home,