28 lines
920 B
Python
28 lines
920 B
Python
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# Copyright 2013 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import json
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import unittest
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from metrics import histogram_util
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class TestHistogram(unittest.TestCase):
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def testSubtractHistogram(self):
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baseline_histogram = """{"count": 3, "buckets": [
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{"low": 1, "high": 2, "count": 1},
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{"low": 2, "high": 3, "count": 2}]}"""
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histogram = """{"count": 14, "buckets": [
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{"low": 1, "high": 2, "count": 1},
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{"low": 2, "high": 3, "count": 3},
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{"low": 3, "high": 4, "count": 10}]}"""
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new_histogram = json.loads(
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histogram_util.SubtractHistogram(histogram, baseline_histogram))
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new_buckets = dict()
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for b in new_histogram['buckets']:
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new_buckets[b['low']] = b['count']
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self.assertFalse(1 in new_buckets)
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self.assertEquals(1, new_buckets[2])
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self.assertEquals(10, new_buckets[3])
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