1 files changed, 68 insertions, 0 deletions
diff --git a/tests/test_shortcuts.py b/tests/test_shortcuts.py
new file mode 100644
index 0000000..287c6d3
--- /dev/null
+++ b/tests/test_shortcuts.py
@@ -0,0 +1,68 @@
+from __future__ import annotations
+
+from prompt_toolkit.shortcuts import print_container
+from prompt_toolkit.shortcuts.prompt import _split_multiline_prompt
+from prompt_toolkit.widgets import Frame, TextArea
+
+
+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")]
+
+
+def test_print_container(tmpdir):
+    # Call `print_container`, render to a dummy file.
+    f = tmpdir.join("output")
+    with open(f, "w") as fd:
+        print_container(Frame(TextArea(text="Hello world!\n"), title="Title"), file=fd)
+
+    # Verify rendered output.
+    with open(f) as fd:
+        text = fd.read()
+        assert "Hello world" in text
+        assert "Title" in text