git/t/t0009-prio-queue.sh
Derrick Stolee aca4240f6a prio-queue: add 'peek' operation
When consuming a priority queue, it can be convenient to inspect
the next object that will be dequeued without actually dequeueing
it. Our existing library did not have such a 'peek' operation, so
add it as prio_queue_peek().

Add a reference-level comparison in t/helper/test-prio-queue.c
so this method is exercised by t0009-prio-queue.sh. Further, add
a test that checks the behavior when the compare function is NULL
(i.e. the queue becomes a stack).

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-02 12:14:21 +09:00

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#!/bin/sh
test_description='basic tests for priority queue implementation'
. ./test-lib.sh
cat >expect <<'EOF'
1
2
3
4
5
5
6
7
8
9
10
EOF
test_expect_success 'basic ordering' '
test-tool prio-queue 2 6 3 10 9 5 7 4 5 8 1 dump >actual &&
test_cmp expect actual
'
cat >expect <<'EOF'
2
3
4
1
5
6
EOF
test_expect_success 'mixed put and get' '
test-tool prio-queue 6 2 4 get 5 3 get get 1 dump >actual &&
test_cmp expect actual
'
cat >expect <<'EOF'
1
2
NULL
1
2
NULL
EOF
test_expect_success 'notice empty queue' '
test-tool prio-queue 1 2 get get get 1 2 get get get >actual &&
test_cmp expect actual
'
cat >expect <<'EOF'
3
2
6
4
5
1
8
EOF
test_expect_success 'stack order' '
test-tool prio-queue stack 8 1 5 4 6 2 3 dump >actual &&
test_cmp expect actual
'
test_done