feat: implement subscript and superscript parsers

plugin/gomark/parser/superscript_test.go

@@ -0,0 +1,47 @@
+package parser
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/usememos/memos/plugin/gomark/ast"
+	"github.com/usememos/memos/plugin/gomark/parser/tokenizer"
+	"github.com/usememos/memos/plugin/gomark/restore"
+)
+
+func TestSuperscriptParser(t *testing.T) {
+	tests := []struct {
+		text        string
+		superscript ast.Node
+	}{
+		{
+			text:        "^Hello world!",
+			superscript: nil,
+		},
+		{
+			text: "^Hello^",
+			superscript: &ast.Superscript{
+				Content: "Hello",
+			},
+		},
+		{
+			text: "^ Hello ^",
+			superscript: &ast.Superscript{
+				Content: " Hello ",
+			},
+		},
+		{
+			text: "^1^ Hello ^ ^",
+			superscript: &ast.Superscript{
+				Content: "1",
+			},
+		},
+	}
+
+	for _, test := range tests {
+		tokens := tokenizer.Tokenize(test.text)
+		node, _ := NewSuperscriptParser().Parse(tokens)
+		require.Equal(t, restore.Restore([]ast.Node{test.superscript}), restore.Restore([]ast.Node{node}))
+	}
+}