t/t6500-gc.sh: add additional test cases

In the last commit, we refactored some of the tests in t6500 to make
clearer when cruft packs will and won't be generated by `git gc`.

Add the remaining cases not covered by the previous patch into this one,
which enumerates all possible combinations of arguments that will
produce (or not produce) a cruft pack.

This prepares us for a future commit which will change the default value
of `gc.cruftPacks` by ensuring that we understand which invocations do
and do not change as a result.

Signed-off-by: Taylor Blau <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: ttaylorr

t/t6500-gc.sh

@@ -218,6 +218,7 @@ assert_no_cruft_packs () {
 for argv in \
 	"gc --cruft" \
 	"-c gc.cruftPacks=true gc" \
+	"-c gc.cruftPacks=false gc --cruft" \
 	"-c feature.experimental=true gc" \
 	"-c gc.cruftPacks=true -c feature.experimental=false gc"
 do
@@ -243,6 +244,9 @@ do
 done
 
 for argv in \
+	"gc" \
+	"-c gc.cruftPacks=false gc" \
+	"-c gc.cruftPacks=true gc --no-cruft" \
 	"-c feature.expiremental=true -c gc.cruftPacks=false gc" \
 	"-c feature.experimental=false gc"
 do