Add IT for checking the creation of depclean-results.json (#84)

depclean-maven-plugin/src/main/java/se/kth/depclean/util/MavenInvoker.java

@@ -42,16 +42,15 @@ private MavenInvoker() {
    * @throws InterruptedException In case of IO issues.
    */
   public static String[] runCommand(String cmd) throws IOException, InterruptedException {
-    String os = System.getProperty("os.name").toLowerCase();
     Process process;
     ArrayList<String> list;
-    if (isUnix(os)) {
+    if (OsUtils.isUnix()) {
       list = new ArrayList<>();
       process = Runtime.getRuntime().exec(cmd);
       InputStream inputStream = process.getInputStream();
       BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
       return outputToConsole(process, list, br);
-    } else if (isWindows(os)) {
+    } else if (OsUtils.isWindows()) {
       list = new ArrayList<>();
       process = Runtime.getRuntime().exec("cmd /C " + cmd);
       BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
@@ -73,12 +72,4 @@ private static String[] outputToConsole(Process process, ArrayList<String> list,
     br.close();
     return list.toArray(new String[0]);
   }
-
-  private static boolean isUnix(String os) {
-    return (os.contains("nix") || os.contains("nux") || os.contains("mac os"));
-  }
-
-  private static boolean isWindows(String os) {
-    return (os.contains("win"));
-  }
 }

depclean-maven-plugin/src/main/java/se/kth/depclean/util/OsUtils.java

@@ -0,0 +1,20 @@
+package se.kth.depclean.util;
+
+/**
+ * Utility class to determine the operative system being used.
+ */
+public class OsUtils {
+
+  private static final String OS = System.getProperty("os.name").toLowerCase();
+
+  private OsUtils() {
+  }
+
+  public static boolean isUnix() {
+    return (OS.contains("nix") || OS.contains("nux") || OS.contains("mac os"));
+  }
+
+  public static boolean isWindows() {
+    return (OS.contains("win"));
+  }
+}

depclean-maven-plugin/src/test/java/se/kth/depclean/DepCleanMojoIT.java

@@ -6,7 +6,11 @@
 import com.soebes.itf.jupiter.extension.MavenTest;
 import com.soebes.itf.jupiter.maven.MavenExecutionResult;
 import java.io.File;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import org.apache.commons.io.FileUtils;
 import org.junit.jupiter.api.DisplayName;
+import se.kth.depclean.util.OsUtils;
 
 /**
  * This class executes integration tests against the DepCleanMojo. The projects used for testing are in
@@ -48,17 +52,16 @@ void processor_used(MavenExecutionResult result) {
 
   @MavenTest
   @DisplayName("Test that DepClean creates a proper depclean-results.json file")
-  void json_should_be_correct(MavenExecutionResult result) {
-    File producedJson =
-        new File("target/maven-it/se/kth/depclean/DepCleanMojoIT/json_should_be_correct/project/depclean-results.json");
-    File expectedJson =
-        new File("src/test/resources/depclean-results.json");
-    assertThat(result).isSuccessful()
-        .out()
-        .plain().contains(
-        "Creating depclean-results.json, please wait...",
-        "[INFO] depclean-results.json file created in: " + producedJson.getAbsolutePath());
-    assertThat(expectedJson).hasSameTextualContentAs(producedJson);
+  void json_should_be_correct(MavenExecutionResult result) throws IOException {
+    if (OsUtils.isUnix()) {
+      File expectedJsonFile = new File("src/test/resources/depclean-results.json");
+      String expectedJsonContent = FileUtils.readFileToString(expectedJsonFile, Charset.defaultCharset());
+      assertThat(result).isSuccessful()
+          .project()
+          .hasTarget()
+          .withFile("depclean-results.json")
+          .hasContent(expectedJsonContent);
+    }
   }
 }
 

depclean-maven-plugin/src/test/resources-its/se/kth/depclean/DepCleanMojoIT/json_should_be_correct/pom.xml

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.foo.bar</groupId>
+  <artifactId>foobar</artifactId>
+  <version>1.0.0-SNAPSHOT</version>
+  <packaging>jar</packaging>
+  <name>foobar</name>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+    <maven.compiler.source>11</maven.compiler.source>
+    <maven.compiler.target>11</maven.compiler.target>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.jcabi</groupId>
+      <artifactId>jcabi-manifests</artifactId>
+      <version>1.1</version>
+    </dependency>
+    <dependency>
+      <groupId>commons-io</groupId>
+      <artifactId>commons-io</artifactId>
+      <version>2.8.0</version>
+    </dependency>
+    <dependency>
+      <groupId>commons-codec</groupId>
+      <artifactId>commons-codec</artifactId>
+      <version>1.15</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>se.kth.castor</groupId>
+        <artifactId>depclean-maven-plugin</artifactId>
+        <version>2.0.2-SNAPSHOT</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>depclean</goal>
+            </goals>
+            <configuration>
+              <createResultJson>true</createResultJson>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

depclean-maven-plugin/src/test/resources-its/se/kth/depclean/DepCleanMojoIT/json_should_be_correct/src/main/java/org/UseCommonsCodec.java

@@ -0,0 +1,11 @@
+package org;
+
+import org.apache.commons.codec.Charsets;
+
+public class UseCommonsCodec {
+
+  public static void main(String[] args) {
+    System.out.println(Charsets.UTF_8);
+  }
+
+}

depclean-maven-plugin/src/test/resources-its/se/kth/depclean/DepCleanMojoIT/json_should_be_correct/src/main/java/org/UseJcabiManifest.java

@@ -0,0 +1,11 @@
+package org;
+
+import com.jcabi.manifests.Manifests;
+
+public class UseJcabiManifest {
+
+  public static void main(String[] args) {
+    Manifests manifests = new Manifests();
+    System.out.println(manifests.size());
+  }
+}