strict: {
    options = {
        pure_getters: "strict",
        reduce_vars: false,
        side_effects: true,
        toplevel: true,
    }
    input: {
        var a, b = null, c = {};
        a.prop;
        b.prop;
        c.prop;
        d.prop;
        null.prop;
        (void 0).prop;
        undefined.prop;
    }
    expect: {
        var a, b = null, c = {};
        a.prop;
        b.prop;
        c.prop;
        d.prop;
        null.prop;
        (void 0).prop;
        (void 0).prop;
    }
}

strict_reduce_vars: {
    options = {
        pure_getters: "strict",
        reduce_vars: true,
        side_effects: true,
        toplevel: true,
    }
    input: {
        var a, b = null, c = {};
        a.prop;
        b.prop;
        c.prop;
        d.prop;
        null.prop;
        (void 0).prop;
        undefined.prop;
    }
    expect: {
        var a, b = null, c = {};
        a.prop;
        b.prop;
        d.prop;
        null.prop;
        (void 0).prop;
        (void 0).prop;
    }
}

unsafe: {
    options = {
        pure_getters: true,
        reduce_vars: false,
        side_effects: true,
        toplevel: true,
    }
    input: {
        var a, b = null, c = {};
        a.prop;
        b.prop;
        c.prop;
        d.prop;
        null.prop;
        (void 0).prop;
        undefined.prop;
    }
    expect: {
        var a, b = null, c = {};
        d;
        null.prop;
        (void 0).prop;
        (void 0).prop;
    }
}

unsafe_reduce_vars: {
    options = {
        pure_getters: true,
        reduce_vars: true,
        side_effects: true,
        toplevel: true,
    }
    input: {
        var a, b = null, c = {};
        a.prop;
        b.prop;
        c.prop;
        d.prop;
        null.prop;
        (void 0).prop;
        undefined.prop;
    }
    expect: {
        var a, b = null, c = {};
        d;
        null.prop;
        (void 0).prop;
        (void 0).prop;
    }
}

chained: {
    options = {
        pure_getters: "strict",
        side_effects: true,
    }
    input: {
        a.b.c;
    }
    expect: {
        a.b.c;
    }
}