7c57e03e6d
Covers empty history, push/up/down navigation, draft preservation, boundary clamping, and full navigation cycle.
95 lines
2.2 KiB
Python
95 lines
2.2 KiB
Python
"""Tests for InputHistory."""
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from tuimble.app import InputHistory
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def test_empty_history_up_returns_none():
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h = InputHistory()
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assert h.up("current") is None
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def test_empty_history_down_returns_none():
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h = InputHistory()
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assert h.down() is None
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def test_push_then_up_returns_last():
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h = InputHistory()
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h.push("hello")
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assert h.up("draft") == "hello"
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def test_up_twice_with_single_entry_stays():
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h = InputHistory()
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h.push("one")
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assert h.up("draft") == "one"
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assert h.up("draft") == "one" # no older entry, stays put
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def test_up_navigates_backwards():
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h = InputHistory()
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h.push("first")
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h.push("second")
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h.push("third")
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assert h.up("draft") == "third"
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assert h.up("draft") == "second"
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assert h.up("draft") == "first"
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assert h.up("draft") == "first" # clamped at oldest
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def test_down_navigates_forward():
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h = InputHistory()
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h.push("first")
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h.push("second")
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h.push("third")
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h.up("draft") # -> third
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h.up("draft") # -> second
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assert h.down() == "third"
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def test_down_past_end_restores_draft():
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h = InputHistory()
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h.push("one")
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h.up("my draft") # -> one
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result = h.down() # -> back to draft
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assert result == "my draft"
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def test_down_without_prior_up_returns_none():
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h = InputHistory()
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h.push("one")
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assert h.down() is None
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def test_push_resets_navigation():
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h = InputHistory()
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h.push("first")
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h.up("draft") # -> first
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h.push("second")
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# After push, navigation resets -- up should go to newest
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assert h.up("new draft") == "second"
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def test_up_preserves_current_as_draft():
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"""First up() saves current input; down past end restores it."""
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h = InputHistory()
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h.push("old")
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h.up("typing in progress")
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assert h.down() == "typing in progress"
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def test_full_cycle():
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"""Push several, navigate to oldest, then back to draft."""
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h = InputHistory()
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h.push("a")
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h.push("b")
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h.push("c")
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assert h.up("draft") == "c"
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assert h.up("draft") == "b"
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assert h.up("draft") == "a"
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assert h.down() == "b"
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assert h.down() == "c"
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assert h.down() == "draft"
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assert h.down() is None # already at draft
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