@@ -0,0 +1,78 @@
+package command
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/yuin/goldmark"
+)
+
+func TestCommandExtension(t *testing.T) {
+	markdown := goldmark.New(
+		goldmark.WithExtensions(
+			New(),
+		),
+	)
+
+	tests := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{
+			name:     "basic command reference",
+			input:    "{command}`git clone`",
+			expected: "<p><span class=\"command\"><code>git clone</code></span></p>\n",
+		},
+		{
+			name:     "command reference in sentence",
+			input:    "You can use {command}`mkdir -p` to create nested directories.",
+			expected: "<p>You can use <span class=\"command\"><code>mkdir -p</code></span> to create nested directories.</p>\n",
+		},
+		{
+			name:  "multiple command references",
+			input: "Both {command}`ls -la` and {command}`find . -name \"*.go\"` can be used.",
+			expected: "<p>Both <span class=\"command\"><code>ls -la</code></span> and <span class=\"command\">" +
+				"<code>find . -name \"*.go\"</code></span> can be used.</p>\n",
+		},
+		{
+			name:     "incomplete command reference - no closing backtick",
+			input:    "{command}`missingBacktick",
+			expected: "<p>{command}`missingBacktick</p>\n",
+		},
+		{
+			name:     "incomplete command reference - empty command name",
+			input:    "{command}``",
+			expected: "<p>{command}``</p>\n",
+		},
+		{
+			name:  "command reference with code block",
+			input: "{command}`grep -r` is used in `terminal.sh`",
+			expected: "<p><span class=\"command\"><code>grep -r</code></span> " +
+				"is used in <code>terminal.sh</code></p>\n",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			var buf bytes.Buffer
+			if err := markdown.Convert([]byte(test.input), &buf); err != nil {
+				t.Fatalf("Failed to convert markdown: %v", err)
+			}
+
+			if got := buf.String(); got != test.expected {
+				t.Errorf("Expected:\n%q\nGot:\n%q", test.expected, got)
+			}
+		})
+	}
+}
+
+func TestCommandNodeKind(t *testing.T) {
+	n := &Node{}
+	if kind := n.Kind(); kind != KindCommand {
+		t.Errorf("Expected node kind %v, got %v", KindCommand, kind)
+	}
+	if !n.Inline() {
+		t.Error("Expected node to be inline")
+	}
+}