t: add t0016-oidmap.sh

Add actual tests for operations using `struct oidmap` from oidmap.{c,h}.

Helped-by: SZEDER Gábor <szeder.dev@gmail.com>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t0016-oidmap.sh

@@ -0,0 +1,84 @@
+#!/bin/sh
+
+test_description='test oidmap'
+. ./test-lib.sh
+
+# This purposefully is very similar to t0011-hashmap.sh
+
+test_oidmap () {
+	echo "$1" | test-tool oidmap $3 >actual &&
+	echo "$2" >expect &&
+	test_cmp expect actual
+}
+
+
+test_expect_success 'setup' '
+
+	test_commit one &&
+	test_commit two &&
+	test_commit three &&
+	test_commit four
+
+'
+
+test_expect_success 'put' '
+
+test_oidmap "put one 1
+put two 2
+put invalidOid 4
+put three 3" "NULL
+NULL
+Unknown oid: invalidOid
+NULL"
+
+'
+
+test_expect_success 'replace' '
+
+test_oidmap "put one 1
+put two 2
+put three 3
+put invalidOid 4
+put two deux
+put one un" "NULL
+NULL
+NULL
+Unknown oid: invalidOid
+2
+1"
+
+'
+
+test_expect_success 'get' '
+
+test_oidmap "put one 1
+put two 2
+put three 3
+get two
+get four
+get invalidOid
+get one" "NULL
+NULL
+NULL
+2
+NULL
+Unknown oid: invalidOid
+1"
+
+'
+
+test_expect_success 'iterate' '
+
+test_oidmap "put one 1
+put two 2
+put three 3
+iterate" "NULL
+NULL
+NULL
+$(git rev-parse two) 2
+$(git rev-parse one) 1
+$(git rev-parse three) 3"
+
+'
+
+test_done