fix: disable test for drive characters except windows

Author: ayame113

test/convert.test.ts

@@ -50,8 +50,11 @@ describe("Convert", () => {
     })
 
     it("does not encode Windows drive specifiers", () => {
-      setProcessPlatform("win32")
-      expect(Convert.pathToUri("d:\\ee\\ff.txt")).toBe("file:///d:/ee/ff.txt")
+      // This test only succeeds on windows. (Because of the difference in the processing method of drive characters)
+      // However, it is enough to test the windows drive character only on windows.
+      if (process.platform === "win32") {
+        expect(Convert.pathToUri("d:\\ee\\ff.txt")).toBe("file:///d:/ee/ff.txt")
+      }
     })
 
     it("URI encodes special characters", () => {