Function TestParse_EdgeCases

pkg/sql/parser/parser_final_coverage_test.go:25–95

TestParse_EdgeCases tests edge cases in the Parse function

(t *testing.T)

// TestParse_EdgeCases tests edge cases in the Parse function
func TestParse_EdgeCases(t *testing.T) {
	tests := []struct {
		name      string
		sql       string
		shouldErr bool
	}{
		{
			name:      "Empty token list",
			sql:       "",
			shouldErr: true,
		},
		{
			name:      "Single semicolon",
			sql:       ";",
			shouldErr: false, // Should parse as empty statement list
		},
		{
			name:      "Multiple statements with semicolons",
			sql:       "SELECT * FROM users; SELECT * FROM products;",
			shouldErr: false,
		},
		{
			name:      "Statement with trailing semicolon",
			sql:       "SELECT * FROM users;",
			shouldErr: false,
		},
		{
			name:      "Multiple semicolons",
			sql:       "SELECT * FROM users;;",
			shouldErr: false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if tt.sql == "" {
				// Empty SQL - test with empty token list
				p := NewParser()
				astObj := ast.NewAST()
				defer ast.ReleaseAST(astObj)

				_, err := p.Parse([]token.Token{})
				if tt.shouldErr && err == nil {
					t.Error("Expected error for empty token list, got nil")
				}
				return
			}

			tokens := tokenizeSQL(t, tt.sql)
			p := NewParser()
			astObj := ast.NewAST()
			defer ast.ReleaseAST(astObj)

			result, err := p.Parse(tokens)

			if tt.shouldErr {
				if err == nil {
					t.Error("Expected error, got nil")