PARIS (Reuters) – Several hard-left trade unions in France are calling for a nationwide strike on Thursday to demand pay increases to cope with soaring inflation, threatening disruption to transport, schools and the energy sector. The one-day walkout is seen as a test of the unions’ ability to mobilise support and a barometer of potential social unrest as President Emmanuel Macron decides whether to push ahead with plans to reform the pension system. The more moderate CFDT union has shunned the strike call, but its boss Laurent Berger has promised street protests later this year if the governm…