{"action":"created","comment":{"url":"https://api.github.com/repos/code-dot-org/code-dot-org/pulls/comments/54421379","id":54421379,"diff_hunk":"@@ -0,0 +1,57 @@\n+require 'minitest/autorun'\n+require 'rack/test'\n+\n+require_relative '../../lib/retention_stats_helper'\n+\n+class RetentionStatsHelperTest < Minitest::Test\n+  def test_get_cumulatives_one_key\n+    stats = {17 => [2, 1, 2]}\n+    assert_equal({17 => [100.0, 60.0, 40.0]}, get_cumulatives(stats))\n+  end\n+\n+  def test_get_cumulatives_multiple_keys\n+    stats = {17 => [2, 1, 2], 18 => [1, 3]}\n+    assert_equal({17 => [100.0, 60.0, 40.0], 18 => [100.0, 75.0]}, get_cumulatives(stats))\n+  end\n+\n+  def test_get_cumulatives_zero_values\n+    stats = {17 => [0, 0]}\n+    assert_equal({17 => [0.0, 0.0]}, get_cumulatives(stats))\n+  end\n+\n+  def test_add_missing_keys_no_missing_keys\n+    base_hash = {1 => 11, 2 => 22}\n+    other_hash = {1 => 111, 2 => 222}\n+\n+    add_missing_keys(base_hash, other_hash, 0)\n+\n+    assert_equal({1 => 111, 2 => 222}, other_hash)\n+  end\n+\n+  def test_add_missing_keys_extra_keys\n+    base_hash = {1 => 11, 2 => 22}\n+    other_hash = {1 => 111, 2 => 222, 3 => 333}\n+\n+    add_missing_keys(base_hash, other_hash, 0)\n+\n+    assert_equal({1 => 111, 2 => 222, 3 => 333}, other_hash) 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Trailing whitespace detected.","created_at":"2016-02-29T15:09:25Z","updated_at":"2016-02-29T15:09:25Z","html_url":"https://github.com/code-dot-org/code-dot-org/pull/7029#discussion_r54421379","pull_request_url":"https://api.github.com/repos/code-dot-org/code-dot-org/pulls/7029","_links":{"self":{"href":"https://api.github.com/repos/code-dot-org/code-dot-org/pulls/comments/54421379"},"html":{"href":"https://github.com/code-dot-org/code-dot-org/pull/7029#discussion_r54421379"},"pull_request":{"href":"https://api.github.com/repos/code-dot-org/code-dot-org/pulls/7029"}}},"pull_request":{"url":"https://api.github.com/repos/code-dot-org/code-dot-org/pulls/7029","id":60961664,"html_url":"https://github.com/code-dot-org/code-dot-org/pull/7029","diff_url":"https://github.com/code-dot-org/code-dot-org/pull/7029.diff","patch_url":"https://github.com/code-dot-org/code-dot-org/pull/7029.patch","issue_url":"https://api.github.com/repos/code-dot-org/code-dot-org/issues/7029","number":7029,"state":"open","locked":false,"title":"Revamps the retention_stats cron.","user":{"login":"ashercodeorg","id":14206260,"avatar_url":"https://avatars.githubusercontent.com/u/14206260?v=3","gravatar_id":"","url":"https://api.github.com/users/ashercodeorg","html_url":"https://github.com/ashercodeorg","followers_url":"https://api.github.com/users/ashercodeorg/followers","following_url":"https://api.github.com/users/ashercodeorg/following{/other_user}","gists_url":"https://api.github.com/users/ashercodeorg/gists{/gist_id}","starred_url":"https://api.github.com/users/ashercodeorg/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ashercodeorg/subscriptions","organizations_url":"https://api.github.com/users/ashercodeorg/orgs","repos_url":"https://api.github.com/users/ashercodeorg/repos","events_url":"https://api.github.com/users/ashercodeorg/events{/privacy}","received_events_url":"https://api.github.com/users/ashercodeorg/received_events","type":"User","site_admin":false},"body":"* Changes what data is saved by the 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