test(versioning/npm): add tests to self cover npm versioning folder (#18355)

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

@@ -109,6 +109,21 @@ describe('modules/versioning/npm/index', () => {
     ${'^1.2.3'}             | ${'replace'}         | ${'1.2.3'}       | ${'1.2.3'}              | ${'^1.2.3'}
     ${'^1.2.3'}             | ${'replace'}         | ${'1.2.3'}       | ${'1.2.2'}              | ${'^1.2.2'}
     ${'^0.9.21'}            | ${'replace'}         | ${'0.9.21'}      | ${'0.9.22'}             | ${'^0.9.21'}
+    ${'1.0.0'}              | ${'pin'}             | ${'1.0.0'}       | ${'1.0.1'}              | ${'1.0.1'}
+    ${'1.x'}                | ${'update-lockfile'} | ${'1.0.0'}       | ${'1.0.1'}              | ${'1.x'}
+    ${'1.x'}                | ${'update-lockfile'} | ${'1.0.0'}       | ${'2.0.1'}              | ${'2.x'}
+    ${'<2.0.0'}             | ${'widen'}           | ${'1.0.0'}       | ${'2.0.1'}              | ${'<3.0.0'}
+    ${'1.0.0 - 2.0.0'}      | ${'widen'}           | ${'1.0.0'}       | ${'2.1.0'}              | ${'1.0.0 - 2.1'}
+    ${'1.x >2.0.0'}         | ${'widen'}           | ${'1.0.0'}       | ${'2.1.0'}              | ${null}
+    ${'^1.0.0'}             | ${'bump'}            | ${'1.0.0'}       | ${'2.0.0'}              | ${'^2.0.0'}
+    ${'~1.0.0'}             | ${'bump'}            | ${'1.0.0'}       | ${'2.0.0'}              | ${'~2.0.0'}
+    ${'>1.0.0'}             | ${'bump'}            | ${'1.0.0'}       | ${'2.1.0'}              | ${null}
+    ${'^1.0.0-alpha'}       | ${'replace'}         | ${'1.0.0-alpha'} | ${'1.0.0-beta'}         | ${'^1.0.0-beta'}
+    ${'~1.0.0'}             | ${'replace'}         | ${'1.0.0'}       | ${'1.1.0'}              | ${'~1.1.0'}
+    ${'1.0.x'}              | ${'replace'}         | ${'1.0.0'}       | ${'1.1.0'}              | ${'1.1.x'}
+    ${'<=1.0'}              | ${'replace'}         | ${'1.0.0'}       | ${'1.2.0'}              | ${'<=1.2'}
+    ${'<=1'}                | ${'replace'}         | ${'1.0.0'}       | ${'2.0.0'}              | ${'<=2'}
+    ${'<= 1'}               | ${'replace'}         | ${'1.0.0'}       | ${'2.0.0'}              | ${'<= 2'}
   `(
     'getNewValue("$currentValue", "$rangeStrategy", "$currentVersion", "$newVersion") === "$expected"',
     ({ currentValue, rangeStrategy, currentVersion, newVersion, expected }) => {