fix(gradle): Accept versions with trailing separators as valid (#33884)

lib/modules/versioning/gradle/compare.ts

@@ -49,10 +49,6 @@ export function tokenize(versionStr: string): Token[] | null {
   let currentVal = '';
 
   function yieldToken(): void {
-    if (currentVal === '') {
-      // We tried to yield an empty token, which means we're in a bad state.
-      result = null;
-    }
     if (result) {
       const val = currentVal;
       if (regEx(/^\d+$/).test(val)) {
@@ -73,8 +69,12 @@ export function tokenize(versionStr: string): Token[] | null {
     if (nextChar === null) {
       yieldToken();
     } else if (isSeparator(nextChar)) {
-      yieldToken();
-      currentVal = '';
+      if (prevChar && !isSeparator(prevChar)) {
+        yieldToken();
+        currentVal = '';
+      } else {
+        result = null;
+      }
     } else if (prevChar !== null && isTransition(prevChar, nextChar)) {
       yieldToken();
       currentVal = nextChar;
@@ -243,11 +243,13 @@ export function parsePrefixRange(input: string): PrefixRange | null {
     return { tokens: [] };
   }
 
-  const postfixRegex = regEx(/[-._]\+$/);
+  const postfixRegex = regEx(/[^-._+][-._]\+$/);
   if (postfixRegex.test(input)) {
     const prefixValue = input.replace(regEx(/[-._]\+$/), '');
     const tokens = tokenize(prefixValue);
-    return tokens ? { tokens } : null;
+    if (tokens) {
+      return { tokens };
+    }
   }
 
   return null;

lib/modules/versioning/gradle/index.spec.ts

@@ -78,6 +78,8 @@ describe('modules/versioning/gradle/index', () => {
       ${'1.0-sp-1'}                | ${'1.0-release'}             | ${1}
       ${'1.0-sp-2'}                | ${'1.0-sp-1'}                | ${1}
       ${''}                        | ${''}                        | ${0}
+      ${'384.vf35b_f26814ec'}      | ${'400.v35420b_922dcb_'}     | ${-1}
+      ${'___'}                     | ${'...'}                     | ${0}
     `('compare("$a", "$b") === $expected', ({ a, b, expected }) => {
       expect(compare(a, b)).toEqual(expected);
     });
@@ -158,6 +160,14 @@ describe('modules/versioning/gradle/index', () => {
       ${'1++2'}                    | ${false}
       ${'1--2'}                    | ${false}
       ${'1__2'}                    | ${false}
+      ${'400.v35420b_922dcb_'}     | ${true}
+      ${'400.v35420b_922dcb'}      | ${true}
+      ${'__'}                      | ${false}
+      ${'_.'}                      | ${false}
+      ${'._'}                      | ${false}
+      ${'_+'}                      | ${false}
+      ${'+.'}                      | ${false}
+      ${'.+'}                      | ${false}
     `('isVersion("$input") === $expected', ({ input, expected }) => {
       expect(api.isVersion(input)).toBe(expected);
     });