1  -- Step definitions for tests/features/wezterm_backdrops.feature
 2  -- Pure index logic (cycle forward/back, set index) plus optional module load.
 3  local runner = require('tests.runner.feature_runner')
 4  
 5  local function cycle_forward(current, n)
 6    if current == n then return 1 end
 7    return current + 1
 8  end
 9  
10  local function cycle_back(current, n)
11    if current == 1 then return n end
12    return current - 1
13  end
14  
15  runner.register('Given', 'backdrops with files', function(w, step_text)
16    local tbl = runner.parse_table_in_step(step_text)
17    w.files = tbl or {}
18    w.n = #w.files
19    w.current_idx = w.current_idx or 1
20  end)
21  
22  runner.register('And', 'current index is 3', function(w)
23    w.current_idx = 3
24  end)
25  
26  runner.register('And', 'current index is 1', function(w)
27    w.current_idx = 1
28  end)
29  
30  runner.register('When', 'I cycle forward', function(w)
31    w.current_idx = cycle_forward(w.current_idx, w.n)
32  end)
33  
34  runner.register('When', 'I cycle back', function(w)
35    w.current_idx = cycle_back(w.current_idx, w.n)
36  end)
37  
38  runner.register('When', 'I set image at index 2', function(w)
39    local idx = 2
40    if idx >= 1 and idx <= w.n then w.current_idx = idx end
41  end)
42  
43  runner.register('When', 'I set image at index 5', function(w)
44    w.index_out_of_range_called = true
45    if 5 > w.n or 5 < 1 then w.error_logged = true end
46  end)
47  
48  runner.register('Then', 'current index is 1', function(w)
49    assert(w.current_idx == 1, 'expected current index 1, got ' .. tostring(w.current_idx))
50  end)
51  
52  runner.register('Then', 'current index is 3', function(w)
53    assert(w.current_idx == 3, 'expected current index 3, got ' .. tostring(w.current_idx))
54  end)
55  
56  runner.register('Then', 'current index is 2', function(w)
57    assert(w.current_idx == 2, 'expected current index 2, got ' .. tostring(w.current_idx))
58  end)
59  
60  runner.register('And', 'current background file is "a.png"', function(w)
61    assert(w.files[w.current_idx] == 'a.png', 'expected a.png, got ' .. tostring(w.files[w.current_idx]))
62  end)
63  
64  runner.register('And', 'current background file is "c.png"', function(w)
65    assert(w.files[w.current_idx] == 'c.png', 'expected c.png, got ' .. tostring(w.files[w.current_idx]))
66  end)
67  
68  runner.register('And', 'current background file is "b.png"', function(w)
69    assert(w.files[w.current_idx] == 'b.png', 'expected b.png, got ' .. tostring(w.files[w.current_idx]))
70  end)
71  
72  runner.register('Then', 'an error was logged for index out of range', function(w)
73    assert(w.error_logged == true, 'expected error to be logged')
74  end)
75  
76  runner.register('And', 'current index is still 1', function(w)
77    assert(w.current_idx == 1, 'expected current index still 1, got ' .. tostring(w.current_idx))
78  end)