How to use the httpx.QueryParams function in httpx

def test_queryparam_types():
    q = QueryParams({"a": True})
    assert str(q) == "a=true"

    q = QueryParams({"a": False})
    assert str(q) == "a=false"

    q = QueryParams({"a": ""})
    assert str(q) == "a="

    q = QueryParams({"a": None})
    assert str(q) == "a="

    q = QueryParams({"a": 1.23})
    assert str(q) == "a=1.23"

    q = QueryParams({"a": 123})
    assert str(q) == "a=123"

assert dict(q) == {"a": "456", "b": "789"}
    assert str(q) == "a=123&a=456&b=789"
    assert repr(q) == "QueryParams('a=123&a=456&b=789')"
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams(
        [("a", "123"), ("b", "456")]
    )
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams("a=123&b=456")
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams(
        {"b": "456", "a": "123"}
    )
    assert QueryParams() == QueryParams({})
    assert QueryParams([("a", "123"), ("a", "456")]) == QueryParams("a=123&a=456")
    assert QueryParams({"a": "123", "b": "456"}) != "invalid"

    q = QueryParams([("a", "123"), ("a", "456")])
    assert QueryParams(q) == q

def test_queryparams(source):
    q = QueryParams(source)
    assert "a" in q
    assert "A" not in q
    assert "c" not in q
    assert q["a"] == "456"
    assert q.get("a") == "456"
    assert q.get("nope", default=None) is None
    assert q.getlist("a") == ["123", "456"]
    assert list(q.keys()) == ["a", "b"]
    assert list(q.values()) == ["456", "789"]
    assert list(q.items()) == [("a", "456"), ("b", "789")]
    assert len(q) == 2
    assert list(q) == ["a", "b"]
    assert dict(q) == {"a": "456", "b": "789"}
    assert str(q) == "a=123&a=456&b=789"
    assert repr(q) == "QueryParams('a=123&a=456&b=789')"
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams(

def test_client_queryparams_string():
    client = Client(params="a=b")
    assert isinstance(client.params, QueryParams)
    assert client.params["a"] == "b"

    client = Client()
    client.params = "a=b"
    assert isinstance(client.params, QueryParams)
    assert client.params["a"] == "b"

def test_queryparam_setters():
    q = QueryParams({"a": 1})
    q.update([])

    assert str(q) == "a=1"

    q = QueryParams([("a", 1), ("a", 2)])
    q["a"] = "3"
    assert str(q) == "a=3"

    q = QueryParams([("a", 1), ("b", 1)])
    u = QueryParams([("b", 2), ("b", 3)])
    q.update(u)

    assert str(q) == "a=1&b=2&b=3"
    assert q["b"] == u["b"]

assert q["a"] == "456"
    assert q.get("a") == "456"
    assert q.get("nope", default=None) is None
    assert q.getlist("a") == ["123", "456"]
    assert list(q.keys()) == ["a", "b"]
    assert list(q.values()) == ["456", "789"]
    assert list(q.items()) == [("a", "456"), ("b", "789")]
    assert len(q) == 2
    assert list(q) == ["a", "b"]
    assert dict(q) == {"a": "456", "b": "789"}
    assert str(q) == "a=123&a=456&b=789"
    assert repr(q) == "QueryParams('a=123&a=456&b=789')"
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams(
        [("a", "123"), ("b", "456")]
    )
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams("a=123&b=456")
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams(
        {"b": "456", "a": "123"}
    )
    assert QueryParams() == QueryParams({})
    assert QueryParams([("a", "123"), ("a", "456")]) == QueryParams("a=123&a=456")
    assert QueryParams({"a": "123", "b": "456"}) != "invalid"

    q = QueryParams([("a", "123"), ("a", "456")])
    assert QueryParams(q) == q

assert list(q.values()) == ["456", "789"]
    assert list(q.items()) == [("a", "456"), ("b", "789")]
    assert len(q) == 2
    assert list(q) == ["a", "b"]
    assert dict(q) == {"a": "456", "b": "789"}
    assert str(q) == "a=123&a=456&b=789"
    assert repr(q) == "QueryParams('a=123&a=456&b=789')"
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams(
        [("a", "123"), ("b", "456")]
    )
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams("a=123&b=456")
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams(
        {"b": "456", "a": "123"}
    )
    assert QueryParams() == QueryParams({})
    assert QueryParams([("a", "123"), ("a", "456")]) == QueryParams("a=123&a=456")
    assert QueryParams({"a": "123", "b": "456"}) != "invalid"

    q = QueryParams([("a", "123"), ("a", "456")])
    assert QueryParams(q) == q

def test_client_queryparams():
    client = Client(params={"a": "b"})
    assert isinstance(client.params, QueryParams)
    assert client.params["a"] == "b"

def test_queryparam_setters():
    q = QueryParams({"a": 1})
    q.update([])

    assert str(q) == "a=1"

    q = QueryParams([("a", 1), ("a", 2)])
    q["a"] = "3"
    assert str(q) == "a=3"

    q = QueryParams([("a", 1), ("b", 1)])
    u = QueryParams([("b", 2), ("b", 3)])
    q.update(u)

    assert str(q) == "a=1&b=2&b=3"
    assert q["b"] == u["b"]

assert list(q) == ["a", "b"]
    assert dict(q) == {"a": "456", "b": "789"}
    assert str(q) == "a=123&a=456&b=789"
    assert repr(q) == "QueryParams('a=123&a=456&b=789')"
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams(
        [("a", "123"), ("b", "456")]
    )
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams("a=123&b=456")
    assert QueryParams({"a": "123", "b": "456"}) == QueryParams(
        {"b": "456", "a": "123"}
    )
    assert QueryParams() == QueryParams({})
    assert QueryParams([("a", "123"), ("a", "456")]) == QueryParams("a=123&a=456")
    assert QueryParams({"a": "123", "b": "456"}) != "invalid"

    q = QueryParams([("a", "123"), ("a", "456")])
    assert QueryParams(q) == q