removeFile() -> overwriteFile()

Author: igorkudrin

lldb/test/API/commands/settings/use_source_cache/TestUseSourceCache.py

@@ -17,8 +17,9 @@ def test_set_use_source_cache_false(self):
         """Test that after 'set use-source-cache false', files are not locked."""
         self.set_use_source_cache_and_test(False)
 
+    @skipIf(hostoslist=no_match(["windows"]))
     def test_set_use_source_cache_true(self):
-        """Test that after 'set use-source-cache false', files are locked."""
+        """Test that after 'set use-source-cache true', files are locked."""
         self.set_use_source_cache_and_test(True)
 
     def set_use_source_cache_and_test(self, is_cache_enabled):
@@ -41,25 +42,28 @@ def set_use_source_cache_and_test(self, is_cache_enabled):
             self, "calc"
         )
 
-        # Ensure that the source file is loaded.
-        self.expect("step", patterns=["-> .+ int x4 ="])
+        # Show the source file contents to make sure LLDB loads src file.
+        self.runCmd("source list")
 
-        # Try deleting the source file.
-        is_file_removed = self.removeFile(src)
+        # Try overwriting the source file.
+        is_file_overwritten = self.overwriteFile(src)
 
         if is_cache_enabled:
-            # Regardless of whether the file is removed, its contents should be displayed.
-            self.expect("step", patterns=["-> .+ int x5 ="])
+            self.assertFalse(
+                is_file_overwritten, "Source cache is enabled, but writing to file succeeded"
+            )
 
         if not is_cache_enabled:
             self.assertTrue(
-                is_file_removed, "Source cache is disabled, but delete file failed"
+                is_file_overwritten, "Source cache is disabled, but writing to file failed"
             )
 
-    def removeFile(self, src):
-        """Remove file and return true iff file was successfully removed."""
+    def overwriteFile(self, src):
+        """Write to file and return true iff file was successfully written."""
         try:
-            os.remove(src)
+            f = open(src, "w")
+            f.writelines(["// hello world\n"])
+            f.close()
             return True
         except Exception:
             return False