Telemetry: Add tests which would've caught the memory_benchmark breakage.

BUG=169084
R=nduca
NOTRY=true


Review URL: https://chromiumcodereview.appspot.com/11778100

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@176143 0039d316-1c4b-4281-b951-d872f2087c98

tools/telemetry/telemetry/csv_page_benchmark_results_unittest.py

@@ -103,4 +103,27 @@ class CsvPageBenchmarkResultsTest(unittest.TestCase):
       [[self._page_set[0].url, '-', '3'],
        [self._page_set[1].url, '4', '-']])
 
+  def test_histogram(self):
+    results = NonPrintingCsvPageBenchmarkResults(csv.writer(self._output),
+                                                 False)
+    results.WillMeasurePage(self._page_set[0])
+    results.Add('a', '',
+                '{"buckets": [{"low": 1, "high": 2, "count": 1}]}',
+                data_type='histogram')
+    results.DidMeasurePage()
+
+    results.WillMeasurePage(self._page_set[1])
+    results.Add('a', '',
+                '{"buckets": [{"low": 2, "high": 3, "count": 1}]}',
+                data_type='histogram')
+    results.DidMeasurePage()
 
+    results.PrintSummary('tag')
+
+    self.assertEquals(
+      self.output_header_row,
+      ['url', 'a ()'])
+    self.assertEquals(
+      self.output_data_rows,
+      [[self._page_set[0].url, '1.5'],
+       [self._page_set[1].url, '2.5']])

tools/telemetry/telemetry/page_benchmark_results_unittest.py

@@ -105,3 +105,32 @@ class PageBenchmarkResultsTest(unittest.TestCase):
     self.assertEquals(
       benchmark_results.results,
       expected)
+
+  def test_histogram(self):
+    page_set = _MakePageSet()
+
+    benchmark_results = SummarySavingPageBenchmarkResults()
+    benchmark_results.WillMeasurePage(page_set.pages[0])
+    benchmark_results.Add('a', '',
+                          '{"buckets": [{"low": 1, "high": 2, "count": 1}]}',
+                          data_type='histogram')
+    benchmark_results.DidMeasurePage()
+
+    benchmark_results.WillMeasurePage(page_set.pages[1])
+    benchmark_results.Add('a', '',
+                          '{"buckets": [{"low": 2, "high": 3, "count": 1}]}',
+                          data_type='histogram')
+    benchmark_results.DidMeasurePage()
+
+    benchmark_results.PrintSummary(None)
+
+    expected = [
+        '*HISTOGRAM a_by_url.http___www.foo.com_: ' +
+        'a_by_url.http___www.foo.com_= ' +
+        '{"buckets": [{"low": 1, "high": 2, "count": 1}]}\n' +
+        'Avg a_by_url.http___www.foo.com_: 1.500000',
+        '*HISTOGRAM a_by_url.http___www.bar.com_: ' +
+        'a_by_url.http___www.bar.com_= ' +
+        '{"buckets": [{"low": 2, "high": 3, "count": 1}]}\n' +
+        'Avg a_by_url.http___www.bar.com_: 2.500000']
+    self.assertEquals(benchmark_results.results, expected)