Update OSDK reference

docs/src/osdk/reference/commands/test.md

@@ -1 +1,22 @@
 # cargo osdk test
+
+`cargo osdk test` is used to execute kernel mode unit test by starting QEMU. The usage is as follows:
+
+```bash
+cargo osdk test [OPTIONS] [TESTNAME]
+```
+
+## Arguments 
+
+[TESTNAME]: Only run tests containing this string in their names
+
+## Options
+
+The options are the same as those of `cargo osdk build`. Refer to the [documentation](build.md) of `cargo osdk build` for more details.
+
+## Examples
+- Execute tests containing foo in their names with q35 as the QEMU machine type: 
+
+```bash
+cargo osdk test foo --qemu.machine="q35"
+```