Implement the initial framework skeleton

internal/prompt/renderer_test.go

@@ -0,0 +1,90 @@
+package prompt
+
+import (
+	"context"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
+)
+
+func TestGoRenderer_Render(t *testing.T) {
+	renderer := NewGoRenderer()
+	ctx := context.Background()
+
+	profile := &domain.PromptProfile{
+		ID:             "test-profile",
+		ExpectedInputs: []string{"transcript"},
+		Templates: []domain.PromptMessageTemplate{
+			{Role: "system", Content: "You are a {{.role}}."},
+			{Role: "user", Content: "Analyze this: {{input \"transcript\"}}"},
+		},
+	}
+
+	inputs := map[string]*domain.Artifact{
+		"transcript": {Body: []byte("The quick brown fox.")},
+	}
+
+	vars := map[string]string{
+		"role": "helpful assistant",
+	}
+
+	t.Run("successful render", func(t *testing.T) {
+		res, err := renderer.Render(ctx, profile, inputs, vars)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if len(res.Messages) != 2 {
+			t.Errorf("expected 2 messages, got %d", len(res.Messages))
+		}
+		if res.Messages[0].Content != "You are a helpful assistant." {
+			t.Errorf("unexpected system message: %s", res.Messages[0].Content)
+		}
+		if res.Messages[1].Content != "Analyze this: The quick brown fox." {
+			t.Errorf("unexpected user message: %s", res.Messages[1].Content)
+		}
+	})
+
+	t.Run("missing required input", func(t *testing.T) {
+		emptyInputs := map[string]*domain.Artifact{}
+		_, err := renderer.Render(ctx, profile, emptyInputs, vars)
+		if err == nil || (err != ErrMissingRequiredInput && err.Error() != "missing required input artifact: transcript") {
+			t.Errorf("expected ErrMissingRequiredInput, got %v", err)
+		}
+	})
+
+	t.Run("unknown input in template", func(t *testing.T) {
+		profileUnknown := &domain.PromptProfile{
+			Templates: []domain.PromptMessageTemplate{
+				{Role: "user", Content: "Hello {{input \"ghost\"}}"},
+			},
+		}
+		_, err := renderer.Render(ctx, profileUnknown, inputs, vars)
+		if err == nil {
+			t.Error("expected error for unknown input")
+		}
+	})
+
+	t.Run("invalid template syntax", func(t *testing.T) {
+		profileInvalid := &domain.PromptProfile{
+			Templates: []domain.PromptMessageTemplate{
+				{Role: "user", Content: "Hello {{.unclosed"},
+			},
+		}
+		_, err := renderer.Render(ctx, profileInvalid, inputs, vars)
+		if err == nil {
+			t.Error("expected error for invalid template syntax")
+		}
+	})
+
+	t.Run("empty message role", func(t *testing.T) {
+		profileNoRole := &domain.PromptProfile{
+			Templates: []domain.PromptMessageTemplate{
+				{Role: "", Content: "Hello"},
+			},
+		}
+		_, err := renderer.Render(ctx, profileNoRole, inputs, vars)
+		if err == nil {
+			t.Error("expected error for empty message role")
+		}
+	})
+}