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Test: improve PFCOUNT with multiple keys testing.

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An user raised a question about a given behavior of PFCOUNT. Added a
test to show the behavior (union) is correct when most of the items are
in common.
This commit is contained in:
antirez 2015-11-03 19:03:09 +01:00
parent 77362b9027
commit 30b324698f
1 changed files with 17 additions and 2 deletions
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19
tests/unit/hyperloglog.tcl
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@ -136,10 +136,9 @@ start_server {tags {"hll"}} {
r pfcount hll
} {5}
test {PFCOUNT multiple-keys merge returns cardinality of union} {
test {PFCOUNT multiple-keys merge returns cardinality of union #1} {
r del hll1 hll2 hll3
for {set x 1} {$x < 10000} {incr x} {
# Force dense representation of hll2
r pfadd hll1 "foo-$x"
r pfadd hll2 "bar-$x"
r pfadd hll3 "zap-$x"
@ -151,6 +150,22 @@ start_server {tags {"hll"}} {
}
}
test {PFCOUNT multiple-keys merge returns cardinality of union #2} {
r del hll1 hll2 hll3
set elements {}
for {set x 1} {$x < 10000} {incr x} {
for {set j 1} {$j <= 3} {incr j} {
set rint [randomInt 20000]
r pfadd hll$j $rint
lappend elements $rint
}
}
set realcard [llength [lsort -unique $elements]]
set card [r pfcount hll1 hll2 hll3]
set err [expr {abs($card-$realcard)}]
assert {$err < (double($card)/100)*5}
}
test {PFDEBUG GETREG returns the HyperLogLog raw registers} {
r del hll
r pfadd hll 1 2 3