chore(core): create sample LDML keyboard that exercises effectively a…

…ll functionality

- add some more functionality

For #10505

core/tests/unit/ldml/keyboards/und-test.xml

@@ -8,5 +8,17 @@
       <keystroke key="1" />
       <check result="1:basic:OK" />
     </test>
+    <test name="key-2">
+      <keystroke key="2" />
+      <check result="2:simple_transform:OK" />
+    </test>
+    <test name="key-3">
+      <keystroke key="3" />
+      <check result="3:simple_marker:OK" />
+    </test>
+    <test name="key-4">
+      <keystroke key="4" />
+      <check result="4:simple_reorder:OK" />
+    </test>
   </tests>
 </keyboardTest3>

core/tests/unit/ldml/keyboards/und.xml

@@ -9,12 +9,43 @@
   <info layout="qwerty" name="Test Keyboards"/>
 
   <keys>
-    <key id="1" output="1:basic:OK"/>
+    <key id="1" output="1:basic:OK" />
+    <key id="2" output="2:simple_transform:FAIL" />
+    <key id="3" output="3:simple_marker:FAIL\m{marker}" />
+    <key id="4" output="4:simple_reorder:UNTIED" />
   </keys>
 
   <layers formId="us">
     <layer modifiers="none" id="base">
       <row keys="gap 1 2 3 4 5 6 7 8 9 0" />
     </layer>
   </layers>
+
+  <transforms type="simple">
+    <transformGroup>
+      <!--
+        from to char
+        -    -   -
+        1    1   U
+        2    2   N
+        3    4   T
+        4    3   I
+        5    5   E
+        6    6   D
+      -->
+      <reorder from="U" order="0" />
+      <reorder from="N" order="1" />
+      <reorder from="I" order="3" /> <!-- the 'T' and 'I' will swap places-->
+      <reorder from="T" order="2" />
+      <reorder from="E" order="4" />
+      <reorder from="D" order="5" />
+    </transformGroup>
+    <transformGroup>
+      <transform from="simple_transform:FAIL" to="simple_transform:OK" />
+      <transform from="FAIL\m{marker}" to="OK" />
+      <transform from="UNITED" to="OK" />
+      <transform from="UNTIED" to="FAIL" />
+    </transformGroup>
+  </transforms>
+
 </keyboard3>