dm: require tmpDir, reasonable defaults

Change-Id: I9d84ce1ebbe417160a29ca2221b1df04901238e3
Reviewed-on: https://skia-review.googlesource.com/83541
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>

1 files changed, 17 insertions, 4 deletions

diff --git a/tests/StreamTest.cpp b/tests/StreamTest.cpp
index 24e74c64b7..01967b70b0 100644
--- a/tests/StreamTest.cpp
+++ b/tests/StreamTest.cpp
@@ -287,12 +287,25 @@ DEF_TEST(StreamPeek, reporter) {
     test_fully_peekable_stream(reporter, &memStream, memStream.getLength());
 
     // Test an arbitrary file stream. file streams do not support peeking.
-    constexpr char filename[] = "images/baby_tux.webp";
-    SkString path = GetResourcePath(filename);
-    if (!sk_exists(path.c_str())) {
-        ERRORF(reporter, "file missing: %s\n", filename);
+    auto tmpdir = skiatest::GetTmpDir();
+    if (tmpdir.isEmpty()) {
+        ERRORF(reporter, "no tmp dir!");
         return;
     }
+    auto path = SkOSPath::Join(tmpdir.c_str(), "file");
+    {
+        SkFILEWStream wStream(path.c_str());
+        constexpr char filename[] = "images/baby_tux.webp";
+        auto data = GetResourceAsData(filename);
+        if (!data || data->size() == 0) {
+            ERRORF(reporter, "resource missing: %s\n", filename);
+            return;
+        }
+        if (!wStream.isValid() || !wStream.write(data->data(), data->size())) {
+            ERRORF(reporter, "error wrtiting to file %s", path.c_str());
+            return;
+        }
+    }
     SkFILEStream fileStream(path.c_str());
     REPORTER_ASSERT(reporter, fileStream.isValid());
     if (!fileStream.isValid()) {