Simplify ghostscript util test for -dSAFER command

With the simple test that only checks that malicious code is not executed
we can theoretically have false positive result if command itself
will not work. The idea is that we run more simplistic commands which are
expected to work the same way in more environments.

QA-12194

Author: yulian-gaponenko

io/src/test/java/com/itextpdf/io/util/GhostscriptHelperTest.java

@@ -167,36 +167,20 @@ public void runGhostScriptTestForAllPages() throws IOException, InterruptedExcep
 
     @Test
     public void dSaferParamInGhostScriptHelperTest() throws IOException, InterruptedException {
-        String cmpPdf = sourceFolder + "maliciousPsInvokingCalcExe.ps";
-        String maliciousPsInvokingCalcExe = destinationFolder + "maliciousPsInvokingCalcExe.png";
-        int majorVersion = 0;
-        int minorVersion = 0;
-        boolean isWindows = identifyOsType().toLowerCase().contains("win");
-        if (isWindows) {
-            String gsExec = SystemUtil.getPropertyOrEnvironmentVariable(GhostscriptHelper.GHOSTSCRIPT_ENVIRONMENT_VARIABLE);
-            if (gsExec == null) {
-                gsExec = SystemUtil.getPropertyOrEnvironmentVariable(GhostscriptHelper.GHOSTSCRIPT_ENVIRONMENT_VARIABLE_LEGACY);
-            }
-            String[] pathParts = gsExec.split("\\d\\.\\d\\d");
-            for (int i = 0; i < pathParts.length; i++) {
-                gsExec = gsExec.replace(pathParts[i], "");
-            }
-            String[] version = gsExec.split("\\.");
-            majorVersion = Integer.parseInt(version[0]);
-            minorVersion = Integer.parseInt(version[1]);
-        }
+        String input = sourceFolder + "unsafePostScript.ps";
+        String outputName = "unsafePostScript.png";
+        String maliciousResult1 = destinationFolder + "output1.txt";
+        String maliciousResult2 = destinationFolder + "output2.txt";
         try {
             GhostscriptHelper ghostscriptHelper = new GhostscriptHelper();
-            ghostscriptHelper.runGhostScriptImageGeneration(cmpPdf, destinationFolder, "maliciousPsInvokingCalcExe.png");
-            if (isWindows) {
-                Assert.assertTrue((majorVersion > 9 || (majorVersion == 9 && minorVersion >= 50)));
-            }
+            ghostscriptHelper.runGhostScriptImageGeneration(input, destinationFolder, outputName);
         } catch (GhostscriptHelper.GhostscriptExecutionException e) {
-            if (isWindows) {
-                Assert.assertTrue((majorVersion < 9 || (majorVersion == 9 && minorVersion < 50)));
-            }
+            System.out.println("Error code was returned on processing of malicious script with -dSAFER option enabled. "
+                    + "This is expected for some environments and ghostscript versions. "
+                    + "We assert only the absence of malicious script result (created file).\n");
         }
-        Assert.assertFalse(FileUtil.fileExists(maliciousPsInvokingCalcExe));
+        Assert.assertFalse(FileUtil.fileExists(maliciousResult1));
+        Assert.assertFalse(FileUtil.fileExists(maliciousResult2));
     }
 
     @Test
@@ -214,15 +198,4 @@ public void ghostScriptImageGenerationTest() throws IOException, InterruptedExce
         ImageMagickHelper imageMagickHelper = new ImageMagickHelper();
         Assert.assertTrue(imageMagickHelper.runImageMagickImageCompare(resultantImage, cmpResultantImage, diff));
     }
-
-    /**
-     * Identifies type of current OS and return it (win, linux).
-     *
-     * @return type of current os as {@link java.lang.String}
-     */
-    private static String identifyOsType() {
-        String os = System.getProperty("os.name") == null
-                ? System.getProperty("OS") : System.getProperty("os.name");
-        return os.toLowerCase();
-    }
 }