test: Correct generation of .test metadata

If a helper executable is not, in itself, a test-case, then we should
not generate metadata that tells ginsttest-runner to run it as a
test-case.

Meanwhile, we were previously generating foo_with_config.test metadata
for tests that don't get installed; stop doing that.

We also need to distinguish between the abstract name of the test
(which usually does not start with test-), the name of the .test file
(which does start with test- for compiled executables), and the name
of the executable (which may include .exe as well). To make validation
against the Autotools build system as straightforward as possible,
generate exactly the same names as in Autotools. We can consider removing
the test- prefix later, if we remove the Autotools build system.

Signed-off-by: Simon McVittie <smcv@collabora.com>

test/meson.build

@@ -85,6 +85,8 @@ xdgdir = custom_target('gen-xdgdir',
     output: 'XDG_RUNTIME_DIR'
 )
 
+installed_tests = []
+
 ###############################################################################
 # Dbus testutils
 
@@ -536,6 +538,13 @@ foreach test: tests
             timeout: timeout,
         )
     endif
+
+    if install and test.get('test', true)
+        installed_tests += [{
+            'name': 'test-' + test.get('name'),
+            'exe': 'test-' + test.get('name') + exe_ext,
+        }]
+    endif
 endforeach
 
 
@@ -573,6 +582,10 @@ foreach script: scripts
             install_mode: 'rwxr-xr-x',
             install_dir: test_exec_dir,
         )
+        installed_tests += [{
+            'name': name,
+            'exe': name,
+        }]
     endif
 
     # Some scripts might be used in tests but not themselves tests,
@@ -588,27 +601,27 @@ foreach script: scripts
 endforeach
 
 
-foreach exe : scripts + tests
-    name = exe.get('name')
-    install = exe.get('install', true)
+foreach test_case: installed_tests
+    name = test_case.get('name')
+    exe = test_case.get('exe', name)
 
     meta_config = configuration_data()
     meta_config.set('command',
         'env @0@/@1@ --tap'.format(
-            get_option('prefix') / test_exec_dir, name
+            get_option('prefix') / test_exec_dir, exe,
     ))
     configure_file(
         input : 'meta_template.test.in',
         output: name + '.test',
         configuration: meta_config,
-        install: install_tests and install,
+        install: install_tests,
         install_dir: test_meta_dir
     )
 
     meta_config = configuration_data()
     meta_config.set('command',
         'env DBUS_TEST_EXEC=@0@ DBUS_TEST_DATA=@0@/data @0@/@1@ --tap'.format(
-            get_option('prefix') / test_exec_dir, name
+            get_option('prefix') / test_exec_dir, exe,
     ))
     configure_file(
         input : 'meta_template.test.in',