Function TestJoinClause

pkg/sql/ast/nodes_test.go:222–283

Test JoinClause node

(t *testing.T)

// Test JoinClause node
func TestJoinClause(t *testing.T) {
	tests := []struct {
		name         string
		join         *JoinClause
		wantLiteral  string
		wantChildren int
	}{
		{
			name: "INNER JOIN",
			join: &JoinClause{
				Type:      "INNER",
				Left:      TableReference{Name: "users"},
				Right:     TableReference{Name: "orders"},
				Condition: &Identifier{Name: "condition"},
			},
			wantLiteral:  "INNER JOIN",
			wantChildren: 3,
		},
		{
			name: "LEFT JOIN",
			join: &JoinClause{
				Type:      "LEFT",
				Left:      TableReference{Name: "users"},
				Right:     TableReference{Name: "orders"},
				Condition: &Identifier{Name: "condition"},
			},
			wantLiteral:  "LEFT JOIN",
			wantChildren: 3,
		},
		{
			name: "JOIN without condition",
			join: &JoinClause{
				Type:      "CROSS",
				Left:      TableReference{Name: "users"},
				Right:     TableReference{Name: "orders"},
				Condition: nil,
			},
			wantLiteral:  "CROSS JOIN",
			wantChildren: 2,
		},
	}

	for _, tt := range tests {
		tt := tt // G601: Create local copy to avoid memory aliasing
		t.Run(tt.name, func(t *testing.T) {
			// Test TokenLiteral
			if got := tt.join.TokenLiteral(); got != tt.wantLiteral {
				t.Errorf("JoinClause.TokenLiteral() = %v, want %v", got, tt.wantLiteral)
			}

			// Test Children
			children := tt.join.Children()
			if len(children) != tt.wantChildren {
				t.Errorf("JoinClause.Children() count = %d, want %d", len(children), tt.wantChildren)
			}

			// Test that it implements Expression interface
			var _ Expression = tt.join