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65 lines
1.2 KiB
Go
65 lines
1.2 KiB
Go
package ast
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import (
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"golox/token"
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"testing"
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)
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func TestPrinter(t *testing.T) {
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tests := []struct {
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name string
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expr Expr
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expected string
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}{
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{
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name: "Binary expression",
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expr: &BinaryExpr{
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Left: &LiteralExpr{Value: 1},
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Operator: token.Token{Type: token.PLUS, Lexeme: "+"},
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Right: &LiteralExpr{Value: 2},
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},
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expected: "(+ 1 2)",
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},
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{
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name: "Grouping expression",
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expr: &GroupingExpr{
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Expression: &LiteralExpr{Value: 1},
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},
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expected: "(group 1)",
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},
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{
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name: "Literal expression",
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expr: &LiteralExpr{Value: 123},
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expected: "123",
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},
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{
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name: "Unary expression",
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expr: &UnaryExpr{
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Operator: token.Token{Type: token.MINUS, Lexeme: "-"},
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Right: &LiteralExpr{Value: 123},
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},
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expected: "(- 123)",
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},
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{
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name: "Nil literal expression",
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expr: &LiteralExpr{Value: nil},
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expected: "nil",
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},
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{
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name: "Error expression",
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expr: &ErrorExpr{Value: "error"},
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expected: "error",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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printer := NewPrinter()
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result := printer.Print(tt.expr)
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if result != tt.expected {
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t.Errorf("expected %v, got %v", tt.expected, result)
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}
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})
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}
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}
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