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util.stanza: Add method for extracting a single attribute value

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Sometimes you only care about a single attribute, but the child tag
itself may be optional, leading to needing `tag and tag.attr.foo` or
`stanza:find("tag@foo")`.

The `:find()` method is fairly complex, so avoiding it for this kind of
simpler use case is a win.
This commit is contained in:
Kim Alvefur 2022-08-17 19:04:30 +02:00
parent 2294d8b8e0
commit 8959868a28
3 changed files with 10 additions and 3 deletions
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2
spec/util_dataforms_spec.lua
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@ -130,7 +130,7 @@ describe("util.dataforms", function ()
assert.truthy(st.is_stanza(xform));
assert.equal("x", xform.name);
assert.equal("jabber:x:data", xform.attr.xmlns);
assert.equal("FORM_TYPE", xform:find("field@var"));
assert.equal("FORM_TYPE", xform:get_child_attr("field", nil, "var"));
assert.equal("xmpp:prosody.im/spec/util.dataforms#1", xform:find("field/value#"));
local allowed_direct_children = {
title = true,