Support pattern matching in tr_link

docs/functions.rst

@@ -10,7 +10,7 @@ from Sphinx-Needs documentation to know how to use them.
 
 
 tr_link
----------
+-------
 Links a need (e.g testcase) automatically to other needs, which have a specific value in a given option.
 
 **Usage**::
@@ -25,16 +25,16 @@ Links a need (e.g testcase) automatically to other needs, which have a specific
 
 ``tr_link`` needs the following arguments:
 
-* **source_option**: Name of an option of the test-need, which is used for comparision. E.g. ``classname``.
-* **target_option**: Name of an option of all other needs, which is used for comparision. E.g. ``title``.
+* **source_option**: Name of an option of the test-need, which is used for comparison. E.g. ``classname``.
+* **target_option**: Name of an option of all other needs, which is used for comparison. E.g. ``title``.
 
 The function reads the ``target_option`` from the need, where it is used.
 Then it goes through **all** other needs and checks if the value of their ``source_option`` is equal to
 the ``target_option``.
 If this is the case, their IDs get stored and finally returned.
 
 ``source_option`` can also reference an option with comma separated values.
-In this case a comparions is performed for each value, which may lead to multiple links.
+In this case a comparison is performed for each value, which may lead to multiple links.
 
 **Example**::
 
@@ -81,3 +81,25 @@ In this case a comparions is performed for each value, which may lead to multipl
 
 .. needflow::
    :tags: link_example
+
+
+tr_link_match
+-------------
+
+Similar to ``tr_link``, but allows using a regex to find needs to link to.  
+When using ``tr_link_match``, the value of the ``source_option`` is compiled as a regular expression, and all other needs
+whose ``target_option`` values match this pattern are linked.
+
+**Usage**::
+
+   .. test-case:: Tests/TestSuite.TestCase/*
+      :id: TESTLINK_1
+      :results: "[[tr_link_match('title', 'case')]]",
+
+The example above will link all test results which have a classname starting with ``Tests/TestSuite.TestCase`` 
+(given that the ``results`` are defined as ``needs_extra_links`` in the ``conf.py``).
+
+``tr_link_match`` needs the following arguments:
+
+* **source_option**: Name of an option of the test-need (regex is taken from its value).
+* **target_option**: Name of an option in other needs, which must match the regex in ``source_option``.

sphinxcontrib/test_reports/functions/__init__.py

@@ -1,3 +1,6 @@
+import re
+
+
 def tr_link(app, need, needs, test_option, target_option, *args, **kwargs):
     if test_option not in need:
         return ""
@@ -19,3 +22,31 @@ def tr_link(app, need, needs, test_option, target_option, *args, **kwargs):
                 links.append(need_target["id"])
 
     return links
+
+
+def tr_link_match(app, need, needs, test_option, target_option, *args, **kwargs):
+    if test_option not in need:
+        return ""
+    test_option_value = need[test_option]
+    if test_option_value is None or len(test_option_value) <= 0:
+        return []
+
+    links = []
+    test_pattern = re.compile(test_option_value)
+    for need_target in needs.values():
+        # Skip linking to itself
+        if need_target["id"] == need["id"]:
+            continue
+
+        if target_option not in need_target:
+            continue
+
+        target_option_value = need_target[target_option]
+        if (
+            target_option_value is not None
+            and len(target_option_value) > 0
+            and test_pattern.match(target_option_value)
+        ):
+            links.append(need_target["id"])
+
+    return links

tests/test_tr_link.py

@@ -0,0 +1,65 @@
+from sphinxcontrib.test_reports.functions import tr_link, tr_link_match
+
+
+def test_tr_link_option_not_in_need():
+    """
+    Return an empty string when the specified test option is missing from the need.
+    """
+    assert tr_link(app=None, need={}, needs={}, test_option="a", target_option="b") == ""
+
+def test_tr_link_no_target_option_in_needs():
+    """
+    Return an empty list when the target option is missing in all items of needs.
+    """
+    assert tr_link(app=None, need={"a": "1"}, needs={"x": {"id": "123"}}, test_option="a", target_option="b") == []
+
+def test_tr_link_no_match():
+    """
+    Returns an empty list when no matching value for the test option is found in any of the target options within needs.
+    """
+    assert tr_link(app=None, need={"a": "1"}, needs={"x": {"b": "2", "id": "123"}}, test_option="a", target_option="b") == []
+
+def test_tr_link_match():
+    """
+    Returns a list of ids when there is a matching value in both need and needs.
+    """
+    assert tr_link(app=None, need={"a": "1"}, needs={"x": {"b": "1", "id": "123"}}, test_option="a", target_option="b") == ["123"]
+
+def test_tr_link_regex_match():
+    """
+    Returns a list of ids when the test option value containing an asterisk (*)
+    correctly matches target options using regular expression patterns.
+    """
+    needs = {
+        "x": {"b": "abc123", "id": "111"},
+        "q": {"b": "abc/123", "id": "112"},
+        "y": {"b": "def456", "id": "222"},
+        "z": {"b": "ghi789", "id": "333"},
+    }
+    need = {"id": "1", "a": "abc.*"}
+    assert tr_link_match(
+        app=None, need=need, needs=needs, test_option="a", target_option="b"
+    ) == ["111", "112"]
+
+
+def test_tr_link_regex_no_match():
+    """
+    Returns an empty list when the test option value containing an asterisk (*)
+    does not match any target options using regular expression patterns.
+    """
+    needs = {"x": {"b": "abc123", "id": "111"}, "y": {"b": "def456", "id": "222"}}
+    need = {"id": "1", "a": "xyz.*"}
+    assert (
+        tr_link_match(app=None, need=need, needs=needs, test_option="a", target_option="b")
+        == []
+    )
+
+def test_tr_link_regex_skip_linking_to_itself():
+    """
+    Returns an empty list when the need and needs have the same 'id'.
+    """
+    needs = {"x": {"b": "abc123", "id": "111"}, "y": {"b": "abc123", "id": "222"}}
+    need = {"id": "111", "a": "abc123"}
+    assert tr_link_match(
+        app=None, need=need, needs=needs, test_option="a", target_option="b"
+    ) == ["222"]