validate compression level input better

__tests__/actionUtils.test.ts

@@ -197,12 +197,14 @@ test("getCompressionLevel allows zero for no compression", () => {
     expect(actionUtils.getCompressionLevel("foo")).toBe(0);
 });
 
-test("getCompressionLevel returns undefined for negative values", () => {
+test("getCompressionLevel returns undefined and warns for negative values", () => {
     const infoMock = jest.spyOn(core, "info");
 
     testUtils.setInput("foo", "-3");
     expect(actionUtils.getCompressionLevel("foo")).toBeUndefined();
-    expect(infoMock).not.toHaveBeenCalledWith(expect.stringContaining("compression-level"));
+    expect(infoMock).toHaveBeenCalledWith(
+        "[warning]Invalid compression-level provided: -3. Expected a value between 0 (no compression) and 9 (maximum compression)."
+    );
 });
 
 test("getCompressionLevel returns undefined and warns if input is too large", () => {

dist/restore/index.js

@@ -44358,12 +44358,15 @@ function getInputAsInt(name, options) {
     return value;
 }
 function getCompressionLevel(name, options) {
-    const compressionLevel = getInputAsInt(name, options);
+    const rawValue = core.getInput(name, options);
-    if (compressionLevel === undefined) {
+    if (rawValue === "") {
         return undefined;
     }
-    if (compressionLevel > 9) {
+    const compressionLevel = parseInt(rawValue, 10);
-        logWarning(`Invalid compression-level provided: ${compressionLevel}. Expected a value between 0 (no compression) and 9 (maximum compression).`);
+    if (isNaN(compressionLevel) ||
+        compressionLevel < 0 ||
+        compressionLevel > 9) {
+        logWarning(`Invalid compression-level provided: ${rawValue}. Expected a value between 0 (no compression) and 9 (maximum compression).`);
         return undefined;
     }
     return compressionLevel;

src/utils/actionUtils.ts

@@ -62,15 +62,21 @@ export function getCompressionLevel(
     name: string,
     options?: core.InputOptions
 ): number | undefined {
-    const compressionLevel = getInputAsInt(name, options);
+    const rawValue = core.getInput(name, options);
 
-    if (compressionLevel === undefined) {
+    if (rawValue === "") {
         return undefined;
     }
 
-    if (compressionLevel > 9) {
+    const compressionLevel = parseInt(rawValue, 10);
+
+    if (
+        isNaN(compressionLevel) ||
+        compressionLevel < 0 ||
+        compressionLevel > 9
+    ) {
         logWarning(
-            `Invalid compression-level provided: ${compressionLevel}. Expected a value between 0 (no compression) and 9 (maximum compression).`
+            `Invalid compression-level provided: ${rawValue}. Expected a value between 0 (no compression) and 9 (maximum compression).`
         );
         return undefined;
     }