An ErrorReporter to be used in tests.

PiperOrigin-RevId: 206012444

2 files changed, 35 insertions, 0 deletions

diff --git a/tensorflow/contrib/lite/testing/BUILD b/tensorflow/contrib/lite/testing/BUILD
index 6c7f494e9b..8a2705950d 100644
--- a/tensorflow/contrib/lite/testing/BUILD
+++ b/tensorflow/contrib/lite/testing/BUILD
@@ -210,6 +210,10 @@ cc_library(
 cc_library(
     name = "util",
     hdrs = ["util.h"],
+    deps = [
+        "//tensorflow/contrib/lite:framework",
+        "//tensorflow/contrib/lite:string",
+    ],
 )
 
 cc_test(
diff --git a/tensorflow/contrib/lite/testing/util.h b/tensorflow/contrib/lite/testing/util.h
index 6d20aec141..8aa639157b 100644
--- a/tensorflow/contrib/lite/testing/util.h
+++ b/tensorflow/contrib/lite/testing/util.h
@@ -15,8 +15,39 @@ limitations under the License.
 #ifndef TENSORFLOW_CONTRIB_LITE_TESTING_UTIL_H_
 #define TENSORFLOW_CONTRIB_LITE_TESTING_UTIL_H_
 
+#include <cstdio>
+
+#include "tensorflow/contrib/lite/error_reporter.h"
+#include "tensorflow/contrib/lite/string.h"
+
 namespace tflite {
 
+// An ErrorReporter that collects error message in a string, in addition
+// to printing to stderr.
+class TestErrorReporter : public ErrorReporter {
+ public:
+  int Report(const char* format, va_list args) override {
+    char buffer[1024];
+    int size = vsnprintf(buffer, sizeof(buffer), format, args);
+    fprintf(stderr, "%s", buffer);
+    error_messages_ += buffer;
+    num_calls_++;
+    return size;
+  }
+
+  void Reset() {
+    num_calls_ = 0;
+    error_messages_.clear();
+  }
+
+  int num_calls() const { return num_calls_; }
+  const string& error_messages() const { return error_messages_; }
+
+ private:
+  int num_calls_ = 0;
+  string error_messages_;
+};
+
 inline void LogToStderr() {
 #ifdef PLATFORM_GOOGLE
   FLAGS_logtostderr = true;