intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 51 insertions, 0 deletions

diff --git a/contrib/python/prompt-toolkit/py3/tests/test_shortcuts.py b/contrib/python/prompt-toolkit/py3/tests/test_shortcuts.py
new file mode 100644
index 0000000000..dc4d65b272
--- /dev/null
+++ b/contrib/python/prompt-toolkit/py3/tests/test_shortcuts.py
@@ -0,0 +1,51 @@
+from prompt_toolkit.shortcuts.prompt import _split_multiline_prompt
+
+
+def test_split_multiline_prompt():
+    # Test 1: no newlines:
+    tokens = [("class:testclass", "ab")]
+    has_before_tokens, before, first_input_line = _split_multiline_prompt(
+        lambda: tokens
+    )
+    assert has_before_tokens() is False
+    assert before() == []
+    assert first_input_line() == [
+        ("class:testclass", "a"),
+        ("class:testclass", "b"),
+    ]
+
+    # Test 1: multiple lines.
+    tokens = [("class:testclass", "ab\ncd\nef")]
+    has_before_tokens, before, first_input_line = _split_multiline_prompt(
+        lambda: tokens
+    )
+    assert has_before_tokens() is True
+    assert before() == [
+        ("class:testclass", "a"),
+        ("class:testclass", "b"),
+        ("class:testclass", "\n"),
+        ("class:testclass", "c"),
+        ("class:testclass", "d"),
+    ]
+    assert first_input_line() == [
+        ("class:testclass", "e"),
+        ("class:testclass", "f"),
+    ]
+
+    # Edge case 1: starting with a newline.
+    tokens = [("class:testclass", "\nab")]
+    has_before_tokens, before, first_input_line = _split_multiline_prompt(
+        lambda: tokens
+    )
+    assert has_before_tokens() is True
+    assert before() == []
+    assert first_input_line() == [("class:testclass", "a"), ("class:testclass", "b")]
+
+    # Edge case 2: starting with two newlines.
+    tokens = [("class:testclass", "\n\nab")]
+    has_before_tokens, before, first_input_line = _split_multiline_prompt(
+        lambda: tokens
+    )
+    assert has_before_tokens() is True
+    assert before() == [("class:testclass", "\n")]
+    assert first_input_line() == [("class:testclass", "a"), ("class:testclass", "b")]