config:
    name: "123t$var_a"
    variables:
        var_a: 1
        var_b: 2
        var_c: "${sum_two($var_a, $var_b)}"
        var_d: "${gen_random_string(5)}"
        var_e: $var_d
        PROJECT_KEY: ${ENV(PROJECT_KEY)}

teststeps:
-
    name: testcase1-$var_a
    request:
        url: /api1
        method: GET
        headers:
            var_a: $var_a
            var_b: $var_b
            var_c: $var_c
    validate:
        - {"check": "status_code", "comparator": "eq", "expect": 200}