Make mixing test die earlier on failure instead of spamming errors

webrtc/voice_engine/test/auto_test/standard/mixing_test.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 111 matching lines @@
     // Verify the mixed output.
     FILE* output_file = fopen(output_filename_.c_str(), "rb");
     ASSERT_TRUE(output_file != NULL);
     int16_t output_value = 0;
     int samples_read = 0;
     while (fread(&output_value, sizeof(output_value), 1, output_file) == 1) {
       samples_read++;
       std::ostringstream trace_stream;
       trace_stream << samples_read << " samples read";
       SCOPED_TRACE(trace_stream.str());
-      EXPECT_LE(output_value, max_output_value);
-      EXPECT_GE(output_value, min_output_value);
+      ASSERT_LE(output_value, max_output_value);
+      ASSERT_GE(output_value, min_output_value);
     }
     // Ensure we've at least recorded half as much file as the duration of the
     // test. We have to use a relaxed tolerance here due to filesystem flakiness
     // on the bots.
     ASSERT_GE((samples_read * 1000.0) / kRecSampleRateHz, kTestDurationMs);
     // Ensure we read the entire file.
     ASSERT_NE(0, feof(output_file));
     ASSERT_EQ(0, fclose(output_file));
   }
 
@@ skipping 135 matching lines @@
 
 TEST_F(MixingTest, VerifyStereoAndMonoMixing) {
   const int16_t kInputValue = 1000;
   const int16_t kExpectedOutput = kInputValue * 2;
   RunMixingTest(2, 0, 1, false, kInputValue, 1.1 * kExpectedOutput,
                 // Lower than 0.9 due to observed flakiness on bots.
                 0.8 * kExpectedOutput, kCodecL16);
 }
 
 }  // namespace webrtc