Method check_header

test/brpc_http_rpc_protocol_unittest.cpp:1129–1133

private:
    void check_header(brpc::Controller* cntl) {
        const std::string* test_header = cntl->http_request().GetHeader(TEST_PROGRESSIVE_HEADER);
        GOOGLE_CHECK_NOTNULL(test_header);
        CHECK_EQ(*test_header, TEST_PROGRESSIVE_HEADER_VAL);
    }
};

TEST_F(HttpTest, server_end_read_short_body_progressively) {