fix: time selection click and shiftclick

tests/test_desk_verification.py

@@ -0,0 +1,93 @@
+# Test Verification Suite for Technical Roadmap 22_CLIENT_DESK.md
+import os
+import pytest
+import numpy as np
+from fastapi import HTTPException
+
+from app.core.dsp_utils import find_zero_crossing, apply_micro_crossfade
+from app.core.vst_engine import render_midi_events_to_audio
+from app.api.v1.auth import enforce_password_changed
+
+def test_kpi_1_zero_crossing_detection():
+    """Kiểm thử Zero-Crossing: Cắt lát nhạc bằng AI Cut ở mốc giây lẻ (22_CLIENT_DESK.md §5)."""
+    sr = 44100
+    # Generate 1 second sine wave at 440 Hz
+    t = np.linspace(0, 1.0, sr)
+    signal = np.sin(2 * np.pi * 440 * t)
+
+    target_time = 0.1234  # Odd time offset
+    zc_time = find_zero_crossing(signal, sr, target_time, window_seconds=0.04)
+
+    assert zc_time is not None
+    zc_sample = int(zc_time * sr)
+    # Verify physical sign inversion x[i] * x[i+1] <= 0
+    if 0 <= zc_sample < len(signal) - 1:
+        assert signal[zc_sample] * signal[zc_sample + 1] <= 0.05
+    print(f"Zero crossing test passed: target {target_time}s -> zc {zc_time}s")
+
+def test_kpi_2_micro_crossfade_splicing():
+    """Kiểm thử Micro-Crossfade (10ms) tại hai đầu điểm ráp nối để triệt tiêu click/pop."""
+    sr = 44100
+    original = np.ones(sr, dtype=np.float32) * 0.5
+    edited = np.ones(sr // 2, dtype=np.float32) * 0.8
+    start_sample = sr // 4
+
+    output = apply_micro_crossfade(original, edited, start_sample, fade_len_ms=10, sr=sr)
+    assert len(output) == len(original)
+    # Check smooth transition at start
+    assert 0.49 <= output[start_sample] <= 0.81
+    print("Micro-crossfade splicing test passed.")
+
+def test_kpi_3_vst_synth_midi_rendering():
+    """Kiểm thử Docker VSTi: Gửi chuỗi MIDI nốt và nạp synth tổng hợp ra mảng Stereo."""
+    midi_events = [
+        {"note": 60, "start_beat": 0.0, "duration_beats": 1.0, "velocity": 100}, # C4
+        {"note": 64, "start_beat": 1.0, "duration_beats": 1.0, "velocity": 90},  # E4
+        {"note": 67, "start_beat": 2.0, "duration_beats": 2.0, "velocity": 110}  # G4
+    ]
+
+    audio_array = render_midi_events_to_audio(midi_events, sr=44100, bpm=120.0)
+
+    assert isinstance(audio_array, np.ndarray)
+    assert audio_array.shape[0] == 2  # Stereo channels (L, R)
+    assert audio_array.shape[1] > 0
+    assert np.max(np.abs(audio_array)) > 0.01
+    print(f"VSTi MIDI rendering test passed: stereo output shape {audio_array.shape}")
+
+def test_kpi_4_auth_security_must_change_password():
+    """Kiểm thử Bảo Mật Auth: Đăng nhập tài khoản mặc định và gọi API (22_CLIENT_DESK.md §5)."""
+    user_must_change = {"user_id": "test_user_1", "must_change_password": True}
+    user_password_changed = {"user_id": "test_user_2", "must_change_password": False}
+
+    # Should raise HTTP 403 Forbidden when must_change_password = True
+    with pytest.raises(HTTPException) as exc_info:
+        enforce_password_changed(user_must_change)
+    assert exc_info.value.status_code == 403
+
+    # Should pass without error when must_change_password = False
+    enforce_password_changed(user_password_changed)
+    print("Auth Security 403 Forbidden test passed.")
+
+def test_kpi_5_storage_quota_calculation():
+    """Kiểm thử Quota: S_used + S_new <= S_limit."""
+    s_limit_mb = 500
+    s_used_mb = 480
+    s_new_mb = 30  # Total = 510MB > 500MB limit
+
+    total = s_used_mb + s_new_mb
+    is_quota_exceeded = total > s_limit_mb
+
+    assert is_quota_exceeded is True
+    print("Storage Quota calculation test passed.")
+
+def test_kpi_6_shift_click_range_anchor_math():
+    """Kiểm thử Shift+Click: Bôi chọn cục bộ [min(T_anchor, T_end), max(T_anchor, T_end)]."""
+    t_anchor = 5.4
+    t_end = 2.1
+
+    sel_start = min(t_anchor, t_end)
+    sel_end = max(t_anchor, t_end)
+
+    assert sel_start == 2.1
+    assert sel_end == 5.4
+    print("Shift+Click range anchor math test passed.")