test: "detect" the test number automagically

Specifying the test number manually is tedious and prone to errors (as
recently proven). Since we have all the necessary data to work out the
test number, let's do it automagically.

test/TEST-01-BASIC/test.sh

@@ -16,4 +16,4 @@ test_append_files() {
     cp -v "$TEST_UNITS_DIR"/{testsuite-01,end}.service "$TEST_UNITS_DIR/testsuite.target" "$dst"
 }
 
-do_test "$@" 01
+do_test "$@"

test/TEST-02-UNITTESTS/test.sh

@@ -71,4 +71,4 @@ check_result_qemu() {
     return $ret
 }
 
-do_test "$@" 02
+do_test "$@"

test/TEST-03-JOBS/test.sh

@@ -8,4 +8,4 @@ IMAGE_NAME="default"
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
-do_test "$@" 03
+do_test "$@"

test/TEST-04-JOURNAL/test.sh

@@ -6,4 +6,4 @@ TEST_DESCRIPTION="Journal-related tests"
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
-do_test "$@" 04
+do_test "$@"

test/TEST-05-RLIMITS/test.sh

@@ -6,4 +6,4 @@ TEST_DESCRIPTION="Resource limits-related tests"
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
-do_test "$@" 05
+do_test "$@"

test/TEST-06-SELINUX/test.sh

@@ -54,4 +54,4 @@ test_append_files() {
     )
 }
 
-do_test "$@" 06
+do_test "$@"

test/TEST-07-ISSUE-1981/test.sh

@@ -9,4 +9,4 @@ TEST_NO_QEMU=1
 
 NSPAWN_TIMEOUT=30
 
-do_test "$@" 07
+do_test "$@"

test/TEST-08-ISSUE-2730/test.sh

@@ -12,4 +12,4 @@ QEMU_TIMEOUT=300
 FSTYPE=ext4
 TEST_FORCE_NEWIMAGE=1
 
-do_test "$@" 08
+do_test "$@"

test/TEST-09-ISSUE-2691/test.sh

@@ -9,4 +9,4 @@ TEST_NO_NSPAWN=1
 
 QEMU_TIMEOUT=300
 
-do_test "$@" 09
+do_test "$@"

test/TEST-10-ISSUE-2467/test.sh

@@ -6,4 +6,4 @@ TEST_DESCRIPTION="https://github.com/systemd/systemd/issues/2467"
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
-do_test "$@" 10
+do_test "$@"

test/TEST-11-ISSUE-3166/test.sh

@@ -7,4 +7,4 @@ TEST_NO_NSPAWN=1
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
-do_test "$@" 11
+do_test "$@"

test/TEST-12-ISSUE-3171/test.sh

@@ -7,4 +7,4 @@ TEST_NO_QEMU=1
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
-do_test "$@" 12
+do_test "$@"

test/TEST-13-NSPAWN-SMOKE/test.sh

@@ -17,4 +17,4 @@ test_append_files() {
     )
 }
 
-do_test "$@" 13
+do_test "$@"

test/TEST-14-MACHINE-ID/test.sh

@@ -12,4 +12,4 @@ test_append_files() {
     printf "556f48e837bc4424a710fa2e2c9d3e3c\ne3d\n" >"${1:?}/etc/machine-id"
 }
 
-do_test "$@" 14
+do_test "$@"

test/TEST-15-DROPIN/test.sh

@@ -7,4 +7,4 @@ TEST_NO_QEMU=1
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
-do_test "$@" 15
+do_test "$@"

test/TEST-16-EXTEND-TIMEOUT/test.sh

@@ -8,4 +8,4 @@ TEST_NO_QEMU=1
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
-do_test "$@" 16
+do_test "$@"

test/TEST-17-UDEV/test.sh

@@ -17,4 +17,4 @@ test_append_files() {
     )
 }
 
-do_test "$@" 17
+do_test "$@"

test/TEST-18-FAILUREACTION/test.sh

@@ -8,4 +8,4 @@ TEST_DESCRIPTION="FailureAction= operation"
 
 QEMU_TIMEOUT=600
 
-do_test "$@" 18
+do_test "$@"

test/TEST-19-DELEGATE/test.sh

@@ -10,4 +10,4 @@ TEST_NO_NSPAWN=1
 QEMU_TIMEOUT=600
 UNIFIED_CGROUP_HIERARCHY=yes
 
-do_test "$@" 19
+do_test "$@"

test/TEST-20-MAINPIDGAMES/test.sh

@@ -6,4 +6,4 @@ TEST_DESCRIPTION="test changing main PID"
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
-do_test "$@" 20
+do_test "$@"