mtest: Add support for rust unit tests

Rust has it's own built in unit test format, which is invoked by
compiling a rust executable with the `--test` flag to rustc. The tests
are then run by simply invoking that binary. They output a custom test
format, which this patch adds parsing support for. This means that we
can report each subtest in the junit we generate correctly, which should
be helpful for orchestration systems like gitlab and jenkins which can
parse junit XML.

1 files changed, 5 insertions, 0 deletions

diff --git a/mesonbuild/backend/backends.py b/mesonbuild/backend/backends.py
index ec3aca6..9bb870c 100644
--- a/mesonbuild/backend/backends.py
+++ b/mesonbuild/backend/backends.py
@@ -46,6 +46,7 @@ class TestProtocol(enum.Enum):
     EXITCODE = 0
     TAP = 1
     GTEST = 2
+    RUST = 3
 
     @classmethod
     def from_str(cls, string: str) -> 'TestProtocol':
@@ -55,6 +56,8 @@ class TestProtocol(enum.Enum):
             return cls.TAP
         elif string == 'gtest':
             return cls.GTEST
+        elif string == 'rust':
+            return cls.RUST
         raise MesonException('unknown test format {}'.format(string))
 
     def __str__(self) -> str:
@@ -62,6 +65,8 @@ class TestProtocol(enum.Enum):
             return 'exitcode'
         elif self is self.GTEST:
             return 'gtest'
+        elif self is self.RUST:
+            return 'rust'
         return 'tap'