basic positive path tests

frontend/src/metabase/__support__/integrated_tests.js

frontend/src/metabase/__support__/integrated_tests_mocks.js

frontend/src/metabase/__support__/sample_dataset_fixture.js

frontend/src/metabase/components/Tooltip.jsx

frontend/src/metabase/lib/api.js

frontend/src/metabase/questions/questions.js

frontend/src/metabase/redux/metadata.js

frontend/src/metabase/reference/reference.js

frontend/src/metabase/reference/reference.spec.js

frontend/src/metabase/store.js

frontend/test/integration/reference/reference.spec.js

frontend/test/unit/reference/utils.spec.js

package.json