add tests for SkDocument

tests/DocumentTest.cpp

+#include "Test.h"
+#include "TestClassDef.h"
+
+#include "SkCanvas.h"
+#include "SkDocument.h"
+#include "SkOSFile.h"
+#include "SkStream.h"
+
+static void test_empty(skiatest::Reporter* reporter) {
+    SkDynamicMemoryWStream stream;
+
+    SkDocument* doc = SkDocument::CreatePDF(&stream);
+
+    doc->close();
+
+    REPORTER_ASSERT(reporter, stream.bytesWritten() == 0);
+}
+
+static void test_abort(skiatest::Reporter* reporter) {
+    SkDynamicMemoryWStream stream;
+    SkAutoTUnref<SkDocument> doc(SkDocument::CreatePDF(&stream));
+
+    SkCanvas* canvas = doc->beginPage(100, 100);
+    canvas->drawColor(SK_ColorRED);
+    doc->endPage();
+
+    doc->abort();
+
+    REPORTER_ASSERT(reporter, stream.bytesWritten() == 0);
+}
+
+static void test_abortWithFile(skiatest::Reporter* reporter) {
+    SkString tmpDir = skiatest::Test::GetTmpDir();
+
+    if (tmpDir.isEmpty()) {
+        return;  // TODO(edisonn): unfortunatelly this pattern is used in other
+                 // tests, but if GetTmpDir() starts returning and empty dir
+                 // allways, then all these tests will be disabled.
+    }
+
+    SkString path = SkOSPath::SkPathJoin(tmpDir.c_str(), "aborted.pdf");
+
+    // Make sure doc's destructor is called to flush.
+    {
+        SkAutoTUnref<SkDocument> doc(SkDocument::CreatePDF(path.c_str()));
+
+        SkCanvas* canvas = doc->beginPage(100, 100);
+        canvas->drawColor(SK_ColorRED);
+        doc->endPage();
+
+        doc->abort();
+    }
+
+    FILE* file = fopen(path.c_str(), "r");
+    // The created file should be empty.
+    char buffer[100];
+    REPORTER_ASSERT(reporter, fread(buffer, 1, 1, file) == 0);
+    fclose(file);
+}
+
+static void test_file(skiatest::Reporter* reporter) {
+    SkString tmpDir = skiatest::Test::GetTmpDir();
+    if (tmpDir.isEmpty()) {
+        return;  // TODO(edisonn): unfortunatelly this pattern is used in other
+                 // tests, but if GetTmpDir() starts returning and empty dir
+                 // allways, then all these tests will be disabled.
+    }
+
+    SkString path = SkOSPath::SkPathJoin(tmpDir.c_str(), "file.pdf");
+
+    SkAutoTUnref<SkDocument> doc(SkDocument::CreatePDF(path.c_str()));
+
+    SkCanvas* canvas = doc->beginPage(100, 100);
+
+    canvas->drawColor(SK_ColorRED);
+    doc->endPage();
+    doc->close();
+
+    FILE* file = fopen(path.c_str(), "r");
+    REPORTER_ASSERT(reporter, file != NULL);
+    char header[100];
+    fread(header, 4, 1, file);
+    REPORTER_ASSERT(reporter, strncmp(header, "%PDF", 4) == 0);
+    fclose(file);
+}
+
+static void test_close(skiatest::Reporter* reporter) {
+    SkDynamicMemoryWStream stream;
+    SkAutoTUnref<SkDocument> doc(SkDocument::CreatePDF(&stream));
+
+    SkCanvas* canvas = doc->beginPage(100, 100);
+    canvas->drawColor(SK_ColorRED);
+    doc->endPage();
+
+    doc->close();
+
+    REPORTER_ASSERT(reporter, stream.bytesWritten() != 0);
+}
+
+DEF_TEST(document_tests, reporter) {
+    test_empty(reporter);
+    test_abort(reporter);
+    test_abortWithFile(reporter);
+    test_file(reporter);
+    test_close(reporter);
+}