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Add an explanation to the expanding notation

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After some team discussion, we found this to be a useful was to explain the samples.

Signed-off-by: Danny Staple <danny@orionrobots.co.uk>
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Danny Staple 2022-12-13 11:11:13 +00:00 committed by GitHub
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1 changed files with 4 additions and 2 deletions
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6
docs/configuration/unit_testing_rules.md
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@ -77,13 +77,15 @@ series: <string>
# This uses expanding notation.
# Expanding notation:
# 'a+bxc' becomes 'a a+b a+(2*b) a+(3*b) … a+(c*b)'
# Read this as series starts at a, then c further samples incrementing by b.
# 'a-bxc' becomes 'a a-b a-(2*b) a-(3*b) … a-(c*b)'
# Read this as series starts at a, then c further samples decrementing by b (or incrementing by negative b).
# There are special values to indicate missing and stale samples:
# '_' represents a missing sample from scrape
# 'stale' indicates a stale sample
# Examples:
# 1. '-2+4x3' becomes '-2 2 6 10'
# 2. ' 1-2x4' becomes '1 -1 -3 -5 -7'
# 1. '-2+4x3' becomes '-2 2 6 10' - series starts at -2, then 3 further samples incrementing by 4.
# 2. ' 1-2x4' becomes '1 -1 -3 -5 -7' - series starts at 1, then 4 further samples decrementing by 2.
# 3. ' 1 _x3 stale' becomes '1 _ _ _ stale'
values: <string>
```