first commit

plugin/markdown/renderer/markdown_renderer_test.go

@@ -0,0 +1,176 @@
+package renderer
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/yuin/goldmark"
+	"github.com/yuin/goldmark/extension"
+	"github.com/yuin/goldmark/parser"
+	"github.com/yuin/goldmark/text"
+
+	"github.com/usememos/memos/plugin/markdown/extensions"
+)
+
+func TestMarkdownRenderer(t *testing.T) {
+	// Create goldmark instance with all extensions
+	md := goldmark.New(
+		goldmark.WithExtensions(
+			extension.GFM,
+			extensions.TagExtension,
+		),
+		goldmark.WithParserOptions(
+			parser.WithAutoHeadingID(),
+		),
+	)
+
+	tests := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{
+			name:     "simple text",
+			input:    "Hello world",
+			expected: "Hello world",
+		},
+		{
+			name:     "paragraph with newlines",
+			input:    "First paragraph\n\nSecond paragraph",
+			expected: "First paragraph\n\nSecond paragraph",
+		},
+		{
+			name:     "emphasis",
+			input:    "This is *italic* and **bold** text",
+			expected: "This is *italic* and **bold** text",
+		},
+		{
+			name:     "headings",
+			input:    "# Heading 1\n\n## Heading 2\n\n### Heading 3",
+			expected: "# Heading 1\n\n## Heading 2\n\n### Heading 3",
+		},
+		{
+			name:     "link",
+			input:    "Check [this link](https://example.com)",
+			expected: "Check [this link](https://example.com)",
+		},
+		{
+			name:     "image",
+			input:    "![alt text](image.png)",
+			expected: "![alt text](image.png)",
+		},
+		{
+			name:     "code inline",
+			input:    "This is `inline code` here",
+			expected: "This is `inline code` here",
+		},
+		{
+			name:     "code block fenced",
+			input:    "```go\nfunc main() {\n}\n```",
+			expected: "```go\nfunc main() {\n}\n```",
+		},
+		{
+			name:     "unordered list",
+			input:    "- Item 1\n- Item 2\n- Item 3",
+			expected: "- Item 1\n- Item 2\n- Item 3",
+		},
+		{
+			name:     "ordered list",
+			input:    "1. First\n2. Second\n3. Third",
+			expected: "1. First\n2. Second\n3. Third",
+		},
+		{
+			name:     "blockquote",
+			input:    "> This is a quote\n> Second line",
+			expected: "> This is a quote\n> Second line",
+		},
+		{
+			name:     "horizontal rule",
+			input:    "Text before\n\n---\n\nText after",
+			expected: "Text before\n\n---\n\nText after",
+		},
+		{
+			name:     "strikethrough",
+			input:    "This is ~~deleted~~ text",
+			expected: "This is ~~deleted~~ text",
+		},
+		{
+			name:     "task list",
+			input:    "- [x] Completed task\n- [ ] Incomplete task",
+			expected: "- [x] Completed task\n- [ ] Incomplete task",
+		},
+		{
+			name:     "tag",
+			input:    "This has #tag in it",
+			expected: "This has #tag in it",
+		},
+		{
+			name:     "multiple tags",
+			input:    "#work #important meeting notes",
+			expected: "#work #important meeting notes",
+		},
+		{
+			name:     "complex mixed content",
+			input:    "# Meeting Notes\n\n**Date**: 2024-01-01\n\n## Attendees\n- Alice\n- Bob\n\n## Discussion\n\nWe discussed #project status.\n\n```python\nprint('hello')\n```",
+			expected: "# Meeting Notes\n\n**Date**: 2024-01-01\n\n## Attendees\n\n- Alice\n- Bob\n\n## Discussion\n\nWe discussed #project status.\n\n```python\nprint('hello')\n```",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// Parse the input
+			source := []byte(tt.input)
+			reader := text.NewReader(source)
+			doc := md.Parser().Parse(reader)
+			require.NotNil(t, doc)
+
+			// Render back to markdown
+			renderer := NewMarkdownRenderer()
+			result := renderer.Render(doc, source)
+
+			// For debugging
+			if result != tt.expected {
+				t.Logf("Input:    %q", tt.input)
+				t.Logf("Expected: %q", tt.expected)
+				t.Logf("Got:      %q", result)
+			}
+
+			assert.Equal(t, tt.expected, result)
+		})
+	}
+}
+
+func TestMarkdownRendererPreservesStructure(t *testing.T) {
+	// Test that parsing and rendering preserves structure
+	md := goldmark.New(
+		goldmark.WithExtensions(
+			extension.GFM,
+			extensions.TagExtension,
+		),
+	)
+
+	inputs := []string{
+		"# Title\n\nParagraph",
+		"**Bold** and *italic*",
+		"- List\n- Items",
+		"#tag #another",
+		"> Quote",
+	}
+
+	renderer := NewMarkdownRenderer()
+
+	for _, input := range inputs {
+		t.Run(input, func(t *testing.T) {
+			source := []byte(input)
+			reader := text.NewReader(source)
+			doc := md.Parser().Parse(reader)
+
+			result := renderer.Render(doc, source)
+
+			// The result should be structurally similar
+			// (may have minor formatting differences)
+			assert.NotEmpty(t, result)
+		})
+	}
+}