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helper: guard against negative inputs into random stagger #14497
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Original file line number | Diff line number | Diff line change |
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```release-note:bug | ||
helpers: Fixed a bug where random stagger func did not protect against negative inputs | ||
``` |
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Original file line number | Diff line number | Diff line change |
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package helper | ||
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import ( | ||
"testing" | ||
"time" | ||
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"github.com/shoenig/test/must" | ||
) | ||
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func TestCluster_RandomStagger(t *testing.T) { | ||
cases := []struct { | ||
name string | ||
input time.Duration | ||
}{ | ||
{name: "positive", input: 1 * time.Second}, | ||
{name: "negative", input: -1 * time.Second}, | ||
{name: "zero", input: 0}, | ||
} | ||
|
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abs := func(d time.Duration) time.Duration { | ||
return Max(d, -d) | ||
} | ||
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for _, tc := range cases { | ||
result := RandomStagger(tc.input) | ||
must.GreaterEq(t, result, 0) | ||
must.LessEq(t, result, abs(tc.input)) | ||
} | ||
} |
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Just now realizing I got these parameters backwards, shoenig/test#33
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fwiw, having the parameters in the same "direction" as the operator feels more intuitive to me. ex.
must.GreaterEq(t, a, b)
reads like it should be checkinga > b
. Whereas for something likemust.Eq
there isn't an obvious expectation vs result in the way the parameters are named anyways.