[PATCH 1/3] tests: add test for names

[Mariusz Tkaczyk <mariusz.tkaczyk@xxxxxxxxxxxxxxx>]

Current behavior is not documented and tested. This test is a base for
future improvements. It is enough to test it only with native metadata,
because it is generic code. Generated properties are passed to metadata
handler.

Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@xxxxxxxxxxxxxxx>
---
 tests/00createnames | 93 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 tests/00createnames

diff --git a/tests/00createnames b/tests/00createnames
new file mode 100644
index 0000000..64b81b9
--- /dev/null
+++ b/tests/00createnames
@@ -0,0 +1,93 @@
+set -x -e
+
+# Test how <devname> and --name= are handled for create mode.
+# We need to check three properties, generated from those parameters:
+# - devnode name
+# - link in /dev/md/ (MD_DEVNAME property from --detail --export)
+# - name in metadata (MD_NAME property from --examine --export)
+
+function _verify() {
+  local DEVNODE_NAME="$1"
+  local WANTED_LINK="$2"
+  local WANTED_NAME="$3"
+
+  local RES="$(mdadm -D --export $DEVNODE_NAME | grep MD_DEVNAME)"
+  if [[ "$?" != "0" ]]; then
+    echo "Cannot get details for $DEVNODE_NAME - unexpected devnode."
+    exit 1
+  fi
+
+  if [[ "$WANTED_LINK" != "empty" ]]; then
+    local EXPECTED="MD_DEVNAME=$WANTED_LINK"
+      if [[ "$RES" != "$EXPECTED" ]]; then
+        echo "$RES doesn't match $EXPECTED."
+        exit 1
+      fi
+  fi
+
+
+  local RES="$(mdadm -E --export $dev0 | grep MD_NAME)"
+  if [[ "$?" != "0" ]]; then
+    echo "Cannot get metadata from $dev0."
+    exit 1
+  fi
+
+  local EXPECTED="MD_NAME=$(hostname):$WANTED_NAME"
+  if [[ "$RES" != "$EXPECTED" ]]; then
+    echo "$RES doesn't match $EXPECTED."
+    exit 1
+  fi
+}
+
+function _create() {
+  local DEVNAME=$1
+  local NAME=$2
+
+  if [[ -z "$NAME" ]]; then
+    mdadm -CR "$DEVNAME" -l0 -n 1 $dev0 --force
+  else
+    mdadm -CR "$DEVNAME" --name="$NAME" -l0 -n 1 $dev0 --force
+  fi
+
+  if [[ "$?" != "0" ]]; then
+    echo "Cannot create device."
+    exit 1
+  fi
+}
+
+# The most trivial case.
+_create "/dev/md/name"
+_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+_create "name"
+_verify "/dev/md127" "name" "name"
+mdadm -S "/dev/md127"
+
+# Use 'mdX' as name.
+_create "/dev/md/md0"
+_verify "/dev/md127" "md0" "md0"
+mdadm -S "/dev/md127"
+
+_create "md0"
+_verify "/dev/md127" "md0" "md0"
+mdadm -S "/dev/md127"
+
+# <devnode> is used to create MD_DEVNAME but, name is used to create MD_NAME.
+_create "/dev/md/devnode" "name"
+_verify "/dev/md127" "devnode" "name"
+mdadm -S "/dev/md127"
+
+_create "devnode" "name"
+_verify "/dev/md127" "devnode" "name"
+mdadm -S "/dev/md127"
+
+# Devnode points to /dev/ directory. MD_DEVNAME doesn't exist.
+_create "/dev/md0"
+_verify "/dev/md0" "empty" "0"
+mdadm -S "/dev/md0"
+
+# Devnode points to /dev/ directory and name is set.
+_create "/dev/md0" "name"
+_verify "/dev/md0" "empty" "name"
+mdadm -S "/dev/md0"
-- 
2.26.2