Refactor stages 1, 2 and test_api overhaul.

scripts/slave/recipe_modules/auto_bisect/test_api.py

+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+import math
+
+from collections import defaultdict
+
+from recipe_engine import recipe_test_api
+
+
+class AutoBisectTestApi(recipe_test_api.RecipeTestApi):
+
+  def compare_samples_data(self, data, rev_a, rev_b):
+    values_a = data[rev_a.commit_hash]['parsed_values'][:rev_a.test_run_count]
+    values_b = data[rev_b.commit_hash]['parsed_values'][:rev_b.test_run_count]
+    while len(values_a) < rev_a.test_run_count:
+      if values_a:
+        values_a.append(values_a[-1])
+      else:
+        values_a.append(0)
+
+    while len(values_b) < rev_b.test_run_count:
+      if values_b:
+        values_b.append(values_b[-1])
+      else:
+        values_b.append(0)
+
+    avg = lambda x: sum(x)/float((len(x) or 1))
+    mean_a = avg(values_a)
+    mean_b = avg(values_b)
+    var_a = map (lambda x: (x - mean_a) ** 2, values_a)
+    var_b = map (lambda x: (x - mean_b) ** 2, values_b)
+    std_dev_a = math.sqrt(avg(var_a))
+    std_dev_b = math.sqrt(avg(var_b))
+    result = 'needMoreData'
+    if len(values_a) >= 5 and len(values_b) >= 5:
+      if mean_a != mean_b:
+        result = True
+      if len(values_a) >= 18 and len(values_b) >= 18:
+        if mean_a == mean_b:
+          result = False
+    return self.m.json.output_stream(
+        {
+            'sample_a': {
+                'debug_values': values_a,
+                'mean': mean_a,
+                'std_dev': std_dev_a
+            },
+            'sample_b': {
+                'debug_values': values_b,
+                'mean': mean_b,
+                'std_dev': std_dev_b,
+            },
+            'result': result
+    })
+
+  @recipe_test_api.mod_test_data
+  def hash_cp_map(self, items):
+    result = {}
+    for item in items:
+      if 'hash' in item and 'commit_pos' in item:
+        result[item['commit_pos']] = self.m.json.output_stream(
+            {'git_sha': item['hash']})
+    return result
+
+  @recipe_test_api.mod_test_data
+  @staticmethod
+  def revision_data(items):
+    result = {}
+    for item in items:
+      if 'hash' in item:
+        result[item['hash']] = item
+    return result
+
+  @recipe_test_api.mod_test_data
+  def revision_list(self, items):
+    result = {}
+    for item in items:
+      if 'hash' in item:
+        depot = item.get('depot', 'chromium')
+        result.setdefault(depot, [])
+        result[depot].append([item['hash'], item.get('commit_pos')])
+    # Exclude the ends of the revision range.
+    result['chromium'] = result['chromium'][1:-1]
+    for depot in result:
+      result[depot] = self.m.json.output_stream(result[depot])
+    return result
+
+  @recipe_test_api.mod_test_data
+  def deps_change(self, items):
+    # If the revision has the key DEPS_change, we mock the result of git show to
+    # appear as if DEPS was among the files changed by the CL.
+    result = {}
+    for item in items:
+      if 'hash' in item:
+        git_output = ''
+        if 'DEPS_change' in item:
+          git_output = 'DEPS'
+      result[item['hash']] = self.m.raw_io.stream_output(git_output)
+    return result
+
+  @recipe_test_api.mod_test_data
+  def diff_patch(self):
+    return self.m.raw_io.stream_output("""
+diff --git a/DEPS b/DEPS
+index 029be3b..2b3ea0a 100644
+--- a/DEPS
++++ b/DEPS
+@@ -13,7 +13,7 @@ deps = {
+     '@98fc59a5896f4ea990a4d527548204fed8f06c64',
+   'build/third_party/infra_libs':
+     'https://chromium.googlesource.com/infra/infra/packages/infra_libs.git'
+-    '@a13e6745a4edd01fee683e4157ea0195872e64eb',
++    '@15ea0920b5f83d0aff4bd042e95bc388d069d51c',
+   'build/third_party/lighttpd':
+     'https://chromium.googlesource.com/chromium/deps/lighttpd.git'
+     '@9dfa55d15937a688a92cbf2b7a8621b0927d06eb',
+    """)
+
+  @recipe_test_api.mod_test_data
+  def deps(self, items):
+    result = {}
+    for item in items:
+      if 'hash' in item:
+        deps_content = ''
+        if 'DEPS' in item:
+          deps_content = item['DEPS']
+      result[item['hash']] = self.m.raw_io.stream_output(deps_content)
+    return result
+
+  @recipe_test_api.mod_test_data
+  def run_results(self, items):
+    def single_result(v):
+      return self.m.raw_io.stream_output(
+          data = v.get('stdout', 'text from actual benchmark, (ignored)'),
+          retcode = v.get('retcode', 0))
+
+    result = {'default': recipe_test_api.StepTestData()}
+    for item in items:
+      if 'hash' in item and 'test_results' in item:
+        result[item['hash']] = [single_result(v) for v in item['test_results']]
+    return result
+
+  @recipe_test_api.mod_test_data
+  def cl_info(self, items):
+    result = {}
+    for item in items:
+      if 'hash' in item:
+        if 'cl_info' in item:
+          info = item['cl_info']
+        else:
+          info = {}
+        result[item['hash']] = self.m.json.output_stream(info)
+    return result
+
+  def __call__(self, config_items):
+    return (
+        self.revision_data(config_items)
+        + self.hash_cp_map(config_items)
+        + self.revision_list(config_items)
+        + self.run_results(config_items)
+        + self.deps_change(config_items)
+        + self.deps(config_items)
+        + self.cl_info (config_items)
+        + self.diff_patch()
+    )
+
+#    """Takes massive dictionary to populate test_data for all steps."""
+#    get commit hash
+#    get test results(gsutil) ?
+#    fetch deps
+#    generating patch
+#    reading culprit information
+#    expanding revision range
+#    hashing modified deps
+#    fetch builder state
+#    fetch build details
+#    (check image) gsutil
+#