1 files changed, 53 insertions, 0 deletions
diff --git a/tests/suggestions.rs b/tests/suggestions.rs
new file mode 100644
index 0000000..d7f3631
--- /dev/null
+++ b/tests/suggestions.rs
@@ -0,0 +1,53 @@
+// Copyright (c) 2021 Soni L.
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+// because we wanna use double underscore (__) for test names
+#![allow(non_snake_case)]
+
+use ::iosonism::suggestion::Suggestion;
+use ::iosonism::suggestion::Suggestions;
+
+#[test]
+fn test_merge__empty() {
+    let merged = Suggestions::merge("foo b", Vec::new());
+    assert!(merged.is_empty());
+}
+
+#[test]
+fn test_merge__single() {
+    let suggestions = Suggestions::create("foo b", vec![
+        Suggestion::new(5..5, "ar".into()),
+    ]);
+    let merged = Suggestions::merge("foo b", vec![suggestions.clone()]);
+    assert_eq!(merged, suggestions);
+}
+
+#[test]
+fn test_merge__multiple() {
+    // it is possible the equivalent of this test fails sometimes in brigdier,
+    // but it should never fail here.
+    // also we use ASCII/UTF-8 ordering rather than locale-sensitive ordering.
+    let a = Suggestions::create("foo b", vec![
+        Suggestion::new(5..5, "ar".into()),
+        Suggestion::new(5..5, "az".into()),
+        Suggestion::new(5..5, "Ar".into()),
+    ]);
+    let b = Suggestions::create("foo b", vec![
+        Suggestion::new(4..5, "foo".into()),
+        Suggestion::new(4..5, "qux".into()),
+        Suggestion::new(4..5, "apple".into()),
+        Suggestion::new(4..5, "Bar".into()),
+    ]);
+    let merged = Suggestions::merge("foo b", vec![a, b]);
+    assert_eq!(merged.get_range(), 4..5);
+    assert_eq!(merged.take_list(), vec![
+        Suggestion::new(4..5, "Bar".into()),
+        Suggestion::new(4..5, "apple".into()),
+        Suggestion::new(4..5, "bAr".into()),
+        Suggestion::new(4..5, "bar".into()),
+        Suggestion::new(4..5, "baz".into()),
+        Suggestion::new(4..5, "foo".into()),
+        Suggestion::new(4..5, "qux".into()),
+    ]);
+}