test: integration tests for full ROCm inference pipeline

LoadModel → Generate → Chat → Close on real AMD GPU hardware.
Build-tagged //go:build rocm so normal go test skips them.

Co-Authored-By: Virgil <virgil@lethean.io>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

rocm_integration_test.go

@@ -0,0 +1,119 @@
+//go:build rocm
+
+package rocm
+
+import (
+	"context"
+	"os"
+	"testing"
+	"time"
+
+	"forge.lthn.ai/core/go-inference"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const testModel = "/data/lem/gguf/LEK-Gemma3-1B-layered-v2-Q5_K_M.gguf"
+
+func skipIfNoModel(t *testing.T) {
+	t.Helper()
+	if _, err := os.Stat(testModel); os.IsNotExist(err) {
+		t.Skip("test model not available (SMB mount down?)")
+	}
+}
+
+func skipIfNoROCm(t *testing.T) {
+	t.Helper()
+	if _, err := os.Stat("/dev/kfd"); err != nil {
+		t.Skip("no ROCm hardware")
+	}
+	if _, err := findLlamaServer(); err != nil {
+		t.Skip("llama-server not found")
+	}
+}
+
+func TestROCm_LoadAndGenerate(t *testing.T) {
+	skipIfNoROCm(t)
+	skipIfNoModel(t)
+
+	b := &rocmBackend{}
+	require.True(t, b.Available())
+
+	m, err := b.LoadModel(testModel, inference.WithContextLen(2048))
+	require.NoError(t, err)
+	defer m.Close()
+
+	assert.Equal(t, "gemma3", m.ModelType())
+
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	var tokens []string
+	for tok := range m.Generate(ctx, "The capital of France is", inference.WithMaxTokens(16)) {
+		tokens = append(tokens, tok.Text)
+	}
+
+	require.NoError(t, m.Err())
+	require.NotEmpty(t, tokens, "expected at least one token")
+
+	full := ""
+	for _, tok := range tokens {
+		full += tok
+	}
+	t.Logf("Generated: %s", full)
+}
+
+func TestROCm_Chat(t *testing.T) {
+	skipIfNoROCm(t)
+	skipIfNoModel(t)
+
+	b := &rocmBackend{}
+	m, err := b.LoadModel(testModel, inference.WithContextLen(2048))
+	require.NoError(t, err)
+	defer m.Close()
+
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	messages := []inference.Message{
+		{Role: "user", Content: "Say hello in exactly three words."},
+	}
+
+	var tokens []string
+	for tok := range m.Chat(ctx, messages, inference.WithMaxTokens(32)) {
+		tokens = append(tokens, tok.Text)
+	}
+
+	require.NoError(t, m.Err())
+	require.NotEmpty(t, tokens, "expected at least one token")
+
+	full := ""
+	for _, tok := range tokens {
+		full += tok
+	}
+	t.Logf("Chat response: %s", full)
+}
+
+func TestROCm_ContextCancellation(t *testing.T) {
+	skipIfNoROCm(t)
+	skipIfNoModel(t)
+
+	b := &rocmBackend{}
+	m, err := b.LoadModel(testModel, inference.WithContextLen(2048))
+	require.NoError(t, err)
+	defer m.Close()
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	var count int
+	for tok := range m.Generate(ctx, "Write a very long story about dragons", inference.WithMaxTokens(256)) {
+		_ = tok
+		count++
+		if count >= 3 {
+			cancel()
+		}
+	}
+
+	t.Logf("Got %d tokens before cancel", count)
+	assert.GreaterOrEqual(t, count, 3)
+}