#!/bin/sh

test_description='basic rebase topology tests'
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-rebase.sh

# a---b---c
#      \
#       d---e
test_expect_success 'setup' '
	test_commit a &&
	test_commit b &&
	test_commit c &&
	git checkout b &&
	test_commit d &&
	test_commit e
'

test_run_rebase () {
	result=$1
	shift
	test_expect_$result "simple rebase $*" "
		reset_rebase &&
		git rebase $* c e &&
		test_cmp_rev c HEAD~2 &&
		test_linear_range 'd e' c..
	"
}
test_run_rebase success ''
test_run_rebase success -m
test_run_rebase success -i
test_run_rebase success -p

test_run_rebase () {
	result=$1
	shift
	test_expect_$result "rebase $* is no-op if upstream is an ancestor" "
		reset_rebase &&
		git rebase $* b e &&
		test_cmp_rev e HEAD
	"
}
test_run_rebase success ''
test_run_rebase success -m
test_run_rebase success -i
test_run_rebase success -p

test_run_rebase () {
	result=$1
	shift
	test_expect_$result "rebase $* -f rewrites even if upstream is an ancestor" "
		reset_rebase &&
		git rebase $* -f b e &&
		! test_cmp_rev e HEAD &&
		test_cmp_rev b HEAD~2 &&
		test_linear_range 'd e' b..
	"
}
test_run_rebase success ''
test_run_rebase success -m
test_run_rebase success -i
test_run_rebase failure -p

test_run_rebase () {
	result=$1
	shift
	test_expect_$result "rebase $* fast-forwards from ancestor of upstream" "
		reset_rebase &&
		git rebase $* e b &&
		test_cmp_rev e HEAD
	"
}
test_run_rebase success ''
test_run_rebase success -m
test_run_rebase success -i
test_run_rebase success -p

#       f
#      /
# a---b---c---g---h
#      \
#       d---G---i
#
# uppercase = cherry-picked
# h = reverted g
#
# Reverted patches are there for tests to be able to check if a commit
# that introduced the same change as another commit is
# dropped. Without reverted commits, we could get false positives
# because applying the patch succeeds, but simply results in no
# changes.
test_expect_success 'setup of linear history for range selection tests' '
	git checkout c &&
	test_commit g &&
	revert h g &&
	git checkout d &&
	cherry_pick G g &&
	test_commit i &&
	git checkout b &&
	test_commit f
'

test_run_rebase () {
	result=$1
	shift
	test_expect_$result "rebase $* drops patches in upstream" "
		reset_rebase &&
		git rebase $* h i &&
		test_cmp_rev h HEAD~2 &&
		test_linear_range 'd i' h..
	"
}
test_run_rebase success ''
test_run_rebase failure -m
test_run_rebase success -i
test_run_rebase success -p

test_run_rebase () {
	result=$1
	shift
	test_expect_$result "rebase $* can drop last patch if in upstream" "
		reset_rebase &&
		git rebase $* h G &&
		test_cmp_rev h HEAD^ &&
		test_linear_range 'd' h..
	"
}
test_run_rebase success ''
test_run_rebase failure -m
test_run_rebase success -i
test_run_rebase success -p

test_run_rebase () {
	result=$1
	shift
	test_expect_$result "rebase $* --onto drops patches in upstream" "
		reset_rebase &&
		git rebase $* --onto f h i &&
		test_cmp_rev f HEAD~2 &&
		test_linear_range 'd i' f..
	"
}
test_run_rebase success ''
test_run_rebase failure -m
test_run_rebase success -i
test_run_rebase success -p

test_run_rebase () {
	result=$1
	shift
	test_expect_$result "rebase $* --onto does not drop patches in onto" "
		reset_rebase &&
		git rebase $* --onto h f i &&
		test_cmp_rev h HEAD~3 &&
		test_linear_range 'd G i' h..
	"
}
test_run_rebase success ''
test_run_rebase success -m
test_run_rebase success -i
test_run_rebase success -p

test_done