Remove compression from linearization tests where possible

By combining --linearize with --compress-streams=n, we ensure that no
new compressed data will appear in linearized output, which makes the
output independent of zlib's output. There are other tests to ensure
that linearization works correctly with compression. This commit
involves changing some test outputs and test code as well just
updating test suites.

examples/qpdf-job.cc

@@ -44,6 +44,7 @@ main(int argc, char* argv[])
             ->endPages()
             ->linearize()
             ->staticId() // for testing only
+            ->compressStreams("n") // avoid dependency on zlib output
             ->checkConfiguration();
         j.run();
         std::cout << "out1 status: " << j.getExitCode() << std::endl;
@@ -63,6 +64,7 @@ main(int argc, char* argv[])
             "1",
             "--",
             "--static-id",
+            "--compress-streams=n", // avoid dependency on zlib output
             nullptr};
         QPDFJob j;
         j.initializeFromArgv(new_argv);
@@ -81,6 +83,7 @@ main(int argc, char* argv[])
   "outputFile": "out3.pdf",
   "staticId": "",
   "linearize": "",
+  "compressStreams": "n",
   "pages": [
     {
       "file": ".",

examples/qpdfjob-c.c

@@ -19,7 +19,7 @@ main(int argc, char* argv[])
 {
     char* infile = NULL;
     char* outfile = NULL;
-    char const* new_argv[6];
+    char const* new_argv[7];
     int r = 0;
     char* p = 0;
 
@@ -43,7 +43,8 @@ main(int argc, char* argv[])
     new_argv[2] = outfile;
     new_argv[3] = "--linearize";
     new_argv[4] = "--static-id"; /* for testing only */
-    new_argv[5] = NULL;
+    new_argv[5] = "--compress-streams=n"; /* avoid dependency on zlib output */
+    new_argv[6] = NULL;
 
     /* See qpdf-job.cc for a C++ example of using the json interface. To use that from C just like
      * the argv one, call qpdfjob_run_from_json instead and pass the json string as a single char

qpdf/qpdf-ctest.c

@@ -200,6 +200,7 @@ test05(char const* infile, char const* password, char const* outfile, char const
     qpdf_register_progress_reporter(qpdf, count_progress, (void*)&count);
     qpdf_set_static_ID(qpdf, QPDF_TRUE);
     qpdf_set_linearization(qpdf, QPDF_TRUE);
+    qpdf_set_compress_streams(qpdf, QPDF_FALSE); // Don't depend on zlib
     qpdf_write(qpdf);
     /* make sure progress reporter was called */
     assert(count > 0);

qpdf/qtest/encryption-parameters.test

@@ -37,7 +37,8 @@ foreach my $file (qw(short-id long-id))
 
     $td->runtest("linearize $file.pdf",
                  {$td->COMMAND =>
-                      "qpdf --deterministic-id --linearize $file.pdf a.pdf"},
+                      "qpdf --deterministic-id --compress-streams=n" .
+                      " --linearize $file.pdf a.pdf"},
                  {$td->STRING => "",
                   $td->EXIT_STATUS => 0},
                  $td->NORMALIZE_NEWLINES);

qpdf/qtest/linearize-pass1.test

@@ -18,6 +18,7 @@ my $n_tests = 3;
 
 $td->runtest("linearize pass 1 file",
              {$td->COMMAND => "qpdf --linearize --static-id" .
+                  " --compress-streams=n" .
                   " --linearize-pass1=b.pdf minimal.pdf a.pdf"},
              {$td->STRING => "", $td->EXIT_STATUS => 0});
 $td->runtest("check output",

qpdf/qtest/pages-tree.test

@@ -18,7 +18,7 @@ my $n_tests = 17;
 
 $td->runtest("linearize duplicated pages",
              {$td->COMMAND =>
-                  "qpdf --static-id --linearize" .
+                  "qpdf --static-id --linearize --compress-streams=n" .
                   " page_api_2.pdf a.pdf"},
              {$td->FILE => "duplicate-page-warning.out",
                   $td->EXIT_STATUS => 3},

qpdf/qtest/specific-file.test

@@ -47,7 +47,8 @@ $td->runtest("check fix-qdf idempotency",
              {$td->FILE => "a.pdf", $td->EXIT_STATUS => 0});
 $td->runtest("pages points to page",
              {$td->COMMAND =>
-                  "qpdf --static-id --linearize pages-is-page.pdf a.pdf"},
+                  "qpdf --static-id --linearize --compress-streams=n" .
+                  " pages-is-page.pdf a.pdf"},
              {$td->FILE => "pages-is-page.out", $td->EXIT_STATUS => 3},
              $td->NORMALIZE_NEWLINES);
 $td->runtest("check output",

qpdf/test_driver.cc

@@ -1211,6 +1211,9 @@ test_32(QPDF& pdf, char const* arg2)
                   << "linearized: " << (linearized ? "yes" : "no") << std::endl
                   << "newline: " << (newline ? "yes" : "no") << std::endl;
         w.setLinearization(linearized);
+        if (linearized) {
+            w.setCompressStreams(false); // avoid dependency on zlib's output
+        }
         w.setExtraHeaderText(newline ? "%% Comment with newline\n" : "%% Comment\n% No newline");
         w.write();
     }