"OpeningPeriod([Time].[Month])", "[Time].[1997].[Q1].[1]");
assertAxisReturns("OpeningPeriod()", "[Time].[1997].[Q1]");
TestContext testContext = getTestContext().withCube("[Sales Ragged]");
testContext.assertAxisThrows(
"OpeningPeriod([Time].[Year], [Store].[All Stores].[Israel])",
"The <level> and <member> arguments to OpeningPeriod must be "
+ "from the same hierarchy. The level was from '[Time]' but "
+ "the member was from '[Store]'.");