Merge pull request #10304 from keymanapp/feat/core/9121-more-regex-ep…

…ic-ldml

feat(core): more regex testing 🙀

core/tests/unit/ldml/keyboards/k_007_transform_rgx-test.xml

@@ -19,4 +19,73 @@
       <check result="ayy" />
     </test>
   </tests>
+  <tests name="regex-coverage-set">
+    <test name="regex-coverage-set-0">
+      <keystroke key="e"/>
+      <keystroke key="x"/>
+      <check result="ex"/> <!-- no change-->
+    </test>
+    <test name="regex-coverage-set-1">
+      <keystroke key="A"/>
+      <keystroke key="x"/>
+      <check result="Z"/>
+    </test>
+    <test name="regex-coverage-set-2">
+      <keystroke key="Y"/>
+      <keystroke key="Y"/>
+      <keystroke key="x"/>
+      <check result="Z"/>
+    </test>
+  </tests>
+  <tests name="regex-coverage-quantifiers">
+    <test name="regex-coverage-quantifiers-0">
+      <keystroke key="e"/>
+      <keystroke key="z"/>
+      <check result="ez"/>
+    </test>
+    <test name="regex-coverage-quantifiers-1">
+      <keystroke key="e"/>
+      <keystroke key="z"/>
+      <keystroke key="z"/>
+      <check result="E"/>
+    </test>
+    <test name="regex-coverage-quantifiers-2">
+      <keystroke key="e"/>
+      <keystroke key="z"/>
+      <keystroke key="z"/>
+      <keystroke key="z"/>
+      <check result="Ez"/> <!-- ezz matches first -->
+    </test>
+    <test name="regex-coverage-quantifiers-3">
+      <keystroke key="e"/>
+      <keystroke key="z"/>
+      <keystroke key="z"/>
+      <keystroke key="z"/>
+      <keystroke key="z"/>
+      <check result="Ezz"/>
+    </test>
+    <test name="regex-coverage-quantifiers-1b">
+      <keystroke key="e"/>
+      <keystroke key="zz"/>
+      <check result="E"/> <!-- zz captured in one go-->
+    </test>
+    <test name="regex-coverage-quantifiers-2b">
+      <keystroke key="e"/>
+      <keystroke key="zzz"/>
+      <check result="E"/> <!-- zzz captured in one go-->
+    </test>
+    <test name="regex-coverage-quantifiers-3b">
+      <keystroke key="e"/>
+      <keystroke key="zzzz"/>
+      <check result="ezzzz"/> <!-- zzzz did not match (too many -->
+      <backspace />
+      <check result="ezzz"/>
+      <keystroke key="z" />
+      <check result="ezzzz"/> <!-- back to where we just were-->
+      <backspace />
+      <backspace />
+      <keystroke key="z" /> <!-- ezz + z => E-->
+      <check result="E"/>
+    </test>
+  </tests>
 </keyboardTest3>

core/tests/unit/ldml/keyboards/k_007_transform_rgx.xml

@@ -10,6 +10,9 @@ from https://github.com/unicode-org/cldr/blob/keyboard-preview/docs/ldml/tr35-ke
 
   <keys>
     <key id="grave" output="`"/>
+    <key id="zz" output="zz" />
+    <key id="zzz" output="zzz" />
+    <key id="zzzz" output="zzzz" />
   </keys>
 
   <layers formId="us">
@@ -24,7 +27,7 @@ from https://github.com/unicode-org/cldr/blob/keyboard-preview/docs/ldml/tr35-ke
       <row keys="grave 1 2 3 4 5 6 7 8 9 0" />
       <row keys="Q W E R T Y U I O P" />
       <row keys="A S D F G H J K L" />
-      <row keys="Z X C V B N M" />
+      <row keys="Z X C V zz zzz zzzz" />
       <row keys="space" />
     </layer>
   </layers>
@@ -38,6 +41,11 @@ from https://github.com/unicode-org/cldr/blob/keyboard-preview/docs/ldml/tr35-ke
     <transformGroup>
       <transform from="([abc])`([def])" to="$2`$1"/> <!-- flip the order:   a`e » e`a -->
       <transform from="($[upper])`" to="$[1:lower]"/> <!-- Lowercase (and drop grave): A` » a -->
+      <transform from="$[upper]x" to="Z" />
+      <transform from="$[upper]x" to="Z" />
+    </transformGroup>
+    <transformGroup>
+      <transform from="ez{2,3}" to="E" />
     </transformGroup>
   </transforms>
 </keyboard3>