tests: Add test for Dependency.get_variable

test cases/common/219 dependency get_variable method/meson.build

@@ -0,0 +1,52 @@
+project(
+  'dependency get_variable',
+  ['c', 'cpp'],
+)
+
+# Just some string that nothing should return
+default = 'asufoiqwjtl;adjfbpiuqwoehtl;ajdfl;ghal;sdjg'
+
+dep = dependency('zlib', method: 'pkg-config', required : false)
+if not dep.found()
+  warning('Skipping pkg-config tests as zlib is not avialable or is not pkg-config')
+else
+  # Test for regular pkg-config
+  # We don't know what the value will be, but we know it should be the same
+  dep = dependency('zlib', method : 'pkg-config')
+  assert(dep.get_pkgconfig_variable('prefix') == dep.get_variable(pkgconfig : 'prefix'),
+        'Got different values from get_pkgconfig_variable and get_variable(pkgconfig: )')
+  assert(dep.get_variable(pkgconfig : default, default : default) == default,
+        'pkg-config didnt get default when we should have.')
+  assert(dep.get_variable(pkgconfig : 'prefix', default : default) != default,
+        'pkg-config got default when we shouldnt have.')
+endif
+
+dep_ct = dependency('llvm', method : 'config-tool', required : false)
+if not dep_ct.found()
+  warning('Skipping config-tool tests as llvm is not available or llvm-config was not found.')
+else
+  assert(dep_ct.get_configtool_variable('has-rtti') == dep_ct.get_variable(configtool : 'has-rtti'),
+        'Got different values from get_configtool_variable and get_variable(configtool: )')
+  assert(dep_ct.get_variable(configtool : default, default : default) == default,
+        'config-tool didnt get default when we should have.')
+  assert(dep_ct.get_variable(configtool : 'has-rtti', default : default) != default,
+        'config-tool got default when we shouldnt have.')
+endif
+
+dep_cm = dependency('llvm', method : 'cmake', required : false)
+if not dep_cm.found()
+  warning('Skipping cmake tests as llvm is not available via the cmake finder.')
+else
+  if dep_ct.found()
+    assert((dep_cm.get_variable(cmake : 'LLVM_ENABLE_RTTI') == 'ON') == (dep_ct.get_variable(configtool : 'has-rtti') == 'YES'),
+          'RTTI information for cmake and config tools disagree')
+  endif
+  assert(dep_cm.get_variable(cmake : default, default : default) == default,
+        'cmake didnt get default when we should have.')
+  assert(dep_cm.get_variable(cmake : 'LLVM_ENABLE_RTTI', default : default) != default,
+        'cmake config-tool got default when we shouldnt have.')
+endif
+
+idep = declare_dependency()
+assert(idep.get_variable(pkgconfig : 'foo', cmake : 'foo', configtool : 'foo', default : default) == default,
+       'Got something other than default from an internal dependency')