fix typo

src/it/report-single-file/pom.xml

@@ -26,7 +26,7 @@
                     </execution>
                 </executions>
                 <configuration>
-                    <signleFile>true</signleFile>
+                    <singleFile>true</singleFile>
                 </configuration>
             </plugin>
         </plugins>

src/it/report-single-file/verify.groovy

@@ -1,7 +1,7 @@
 import java.nio.file.Paths
 
-import static io.qameta.allure.maven.TestHelper.checkIndexHtml
+import static io.qameta.allure.maven.TestHelper.checkSingleFile
 
 def base = Paths.get(basedir.absolutePath, 'target', 'site')
 
-checkIndexHtml(base.resolve('allure-maven-plugin'))
+checkSingleFile(base.resolve('allure-maven-plugin'))

src/test/java/io/qameta/allure/maven/TestHelper.java

@@ -21,8 +21,9 @@
 import java.util.Arrays;
 import java.util.List;
 
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.hasSize;
-import static org.junit.Assert.assertThat;
+import static org.hamcrest.Matchers.not;
 import static ru.yandex.qatools.matchers.nio.PathMatchers.exists;
 import static ru.yandex.qatools.matchers.nio.PathMatchers.isDirectory;
 
@@ -53,9 +54,16 @@ public static void checkReportDirectory(Path outputDirectory, int testCasesCount
                 getTestCases(dataDirectory.resolve("test-cases")), hasSize(testCasesCount));
     }
 
-    public static void checkIndexHtml(Path outputDirectory) {
+    public static void checkSingleFile(Path outputDirectory) {
         Path index = outputDirectory.resolve("index.html");
         assertThat(index, exists());
+
+        Path dataDirectory = outputDirectory.resolve("data");
+        assertThat(dataDirectory, not(exists()));
+
+        for (String fileName : FILE_NAMES) {
+            assertThat(dataDirectory.resolve(fileName), not(exists()));
+        }
     }
 
     public static List<String> getTestCases(Path dataDirectory) {