fix: dot in config name

Rust std `set_extension` is either add an extension if none exists, or
edit the current one if such exists.

This caused a mishandling when user is using a name with a dot,
part of the name was treated as an extension, and be overwritten by
the different format extensions.

So manually *adding* a new dummy extension will cause the current code,
to behave as expected, since it will always overwrite the new dummy
extension and not part of the name.

2 files changed, 19 insertions, 0 deletions

diff --git a/tests/Settings2.default.ini b/tests/Settings2.default.ini
new file mode 100644
index 0000000..16badd4
--- /dev/null
+++ b/tests/Settings2.default.ini
@@ -0,0 +1,9 @@
+debug = true

+production = false

+[place]

+name = Torre di Pisa

+longitude = 43.7224985

+latitude = 10.3970522

+favorite = false

+reviews = 3866

+rating = 4.5

diff --git a/tests/file.rs b/tests/file.rs
index 7bd576e..9e4469a 100644
--- a/tests/file.rs
+++ b/tests/file.rs
@@ -58,3 +58,13 @@ fn test_file_ext() {
     assert_eq!(c.get("debug").ok(), Some(true));
     assert_eq!(c.get("production").ok(), Some(false));
 }
+#[test]
+fn test_file_second_ext() {
+    let c = Config::builder()
+        .add_source(File::with_name("tests/Settings2.default"))
+        .build()
+        .unwrap();
+
+    assert_eq!(c.get("debug").ok(), Some(true));
+    assert_eq!(c.get("production").ok(), Some(false));
+}