feat(wan): Add Wan2.2 I2V support

tests/test_wan_config.py

@@ -0,0 +1,125 @@
+"""Tests for Wan model configuration."""
+
+import pytest
+
+
+# ---------------------------------------------------------------------------
+# Config Tests
+# ---------------------------------------------------------------------------
+
+class TestWanModelConfig:
+    """Tests for WanModelConfig dataclass."""
+
+    def test_default_values(self):
+        from mlx_video.models.wan.config import WanModelConfig
+        config = WanModelConfig()
+        assert config.dim == 5120
+        assert config.ffn_dim == 13824
+        assert config.num_heads == 40
+        assert config.num_layers == 40
+        assert config.in_dim == 16
+        assert config.out_dim == 16
+        assert config.patch_size == (1, 2, 2)
+        assert config.vae_stride == (4, 8, 8)
+        assert config.vae_z_dim == 16
+        assert config.boundary == 0.875
+        assert config.sample_shift == 12.0
+        assert config.sample_steps == 40
+        assert config.sample_guide_scale == (3.0, 4.0)
+        assert config.num_train_timesteps == 1000
+        assert config.qk_norm is True
+        assert config.cross_attn_norm is True
+        assert config.text_len == 512
+
+    def test_head_dim_property(self):
+        from mlx_video.models.wan.config import WanModelConfig
+        config = WanModelConfig()
+        assert config.head_dim == 128  # 5120 // 40
+
+    def test_to_dict_roundtrip(self):
+        from mlx_video.models.wan.config import WanModelConfig
+        config = WanModelConfig()
+        d = config.to_dict()
+        assert isinstance(d, dict)
+        assert d["dim"] == 5120
+        assert d["patch_size"] == (1, 2, 2)
+        assert d["boundary"] == 0.875
+
+    def test_t5_config_values(self):
+        from mlx_video.models.wan.config import WanModelConfig
+        config = WanModelConfig()
+        assert config.t5_vocab_size == 256384
+        assert config.t5_dim == 4096
+        assert config.t5_dim_attn == 4096
+        assert config.t5_dim_ffn == 10240
+        assert config.t5_num_heads == 64
+        assert config.t5_num_layers == 24
+        assert config.t5_num_buckets == 32
+
+
+# ---------------------------------------------------------------------------
+# Wan2.1 Config Tests
+# ---------------------------------------------------------------------------
+
+class TestWan21Config:
+    """Tests for Wan2.1 config presets."""
+
+    def test_wan21_14b_factory(self):
+        from mlx_video.models.wan.config import WanModelConfig
+        config = WanModelConfig.wan21_t2v_14b()
+        assert config.model_version == "2.1"
+        assert config.dual_model is False
+        assert config.dim == 5120
+        assert config.ffn_dim == 13824
+        assert config.num_heads == 40
+        assert config.num_layers == 40
+        assert config.head_dim == 128
+        assert config.sample_guide_scale == 5.0
+        assert config.sample_shift == 5.0
+        assert config.sample_steps == 50
+        assert config.boundary == 0.0
+
+    def test_wan21_1_3b_factory(self):
+        from mlx_video.models.wan.config import WanModelConfig
+        config = WanModelConfig.wan21_t2v_1_3b()
+        assert config.model_version == "2.1"
+        assert config.dual_model is False
+        assert config.dim == 1536
+        assert config.ffn_dim == 8960
+        assert config.num_heads == 12
+        assert config.num_layers == 30
+        assert config.head_dim == 128  # 1536 // 12
+        assert config.sample_guide_scale == 5.0
+
+    def test_wan22_14b_factory(self):
+        from mlx_video.models.wan.config import WanModelConfig
+        config = WanModelConfig.wan22_t2v_14b()
+        assert config.model_version == "2.2"
+        assert config.dual_model is True
+        assert config.dim == 5120
+        assert config.sample_guide_scale == (3.0, 4.0)
+        assert config.sample_shift == 12.0
+        assert config.sample_steps == 40
+        assert config.boundary == 0.875
+
+    def test_wan21_config_to_dict(self):
+        from mlx_video.models.wan.config import WanModelConfig
+        config = WanModelConfig.wan21_t2v_14b()
+        d = config.to_dict()
+        assert d["model_version"] == "2.1"
+        assert d["dual_model"] is False
+        assert d["sample_guide_scale"] == 5.0
+
+    def test_wan21_1_3b_config_to_dict(self):
+        from mlx_video.models.wan.config import WanModelConfig
+        config = WanModelConfig.wan21_t2v_1_3b()
+        d = config.to_dict()
+        assert d["dim"] == 1536
+        assert d["num_layers"] == 30
+
+    def test_default_config_is_wan22(self):
+        """Default WanModelConfig() should be Wan2.2 14B."""
+        from mlx_video.models.wan.config import WanModelConfig
+        config = WanModelConfig()
+        assert config.model_version == "2.2"
+        assert config.dual_model is True