Function test_expressions

subprojects/llama.cpp/tests/test-jinja.cpp:363–435

}

static void test_expressions(testing & t) {
    test_template(t, "simple variable",
        "{{ x }}",
        {{"x", 42}},
        "42"
    );

    test_template(t, "dot notation",
        "{{ user.name }}",
        {{"user", {{"name", "Bob"}}}},
        "Bob"
    );

    test_template(t, "negative float (not dot notation)",
        "{{ -1.0 }}",
        json::object(),
        "-1.0"
    );

    test_template(t, "bracket notation",
        "{{ user['name'] }}",
        {{"user", {{"name", "Bob"}}}},
        "Bob"
    );

    test_template(t, "array access",
        "{{ items[1] }}",
        {{"items", json::array({"a", "b", "c"})}},
        "b"
    );

    test_template(t, "array negative access",
        "{{ items[-1] }}",
        {{"items", json::array({"a", "b", "c"})}},
        "c"
    );

    test_template(t, "array slice",
        "{{ items[1:-1]|string }}",
        {{"items", json::array({"a", "b", "c"})}},
        "['b']"
    );

    test_template(t, "array slice step",
        "{{ items[::2]|string }}",
        {{"items", json::array({"a", "b", "c"})}},
        "['a', 'c']"
    );

    test_template(t, "tuple slice",
        "{{ ('a', 'b', 'c')[::-1]|string }}",
        json::object(),
        "('c', 'b', 'a')"
    );

    test_template(t, "arithmetic",
        "{{ (a + b) * c }}",
        {{"a", 2}, {"b", 3}, {"c", 4}},