Celestino Amoroso
1a1a475dd8
This feature is implemented by expansion, not by dedicated operators, e.g. a*=2+x is exapanded as a=a*(2+x)
54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// t_ast_test.go
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package expr
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import (
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"errors"
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"testing"
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)
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func TestAstString(t *testing.T) {
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tree := NewAst()
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if gotResult := tree.String(); gotResult != "(nil)" {
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t.Errorf(`result: got %q, want "(nil)"`, gotResult)
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}
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}
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func TestAddTokensGood(t *testing.T) {
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tk1 := NewValueToken(0, 0, SymInteger, "100", 100)
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tk2 := NewToken(0, 0, SymPlus, "+")
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tk3 := NewValueToken(0, 0, SymInteger, "50", 500)
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tree := NewAst()
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if gotErr := tree.addTokens(tk1, tk2, tk3); gotErr != nil {
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t.Errorf("err: got <%v>, want <nil>", gotErr)
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}
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}
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func TestAddTokensBad(t *testing.T) {
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tk0 := NewValueToken(0, 0, SymInteger, "200", 200)
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tk1 := NewValueToken(0, 0, SymInteger, "100", 100)
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tk2 := NewToken(0, 0, SymPlus, "+")
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tk3 := NewValueToken(0, 0, SymInteger, "50", 500)
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wantErr := errors.New(`[0:0] two adjacent operators: "200" and "100"`)
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tree := NewAst()
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if gotErr := tree.addTokens(tk0, tk1, tk2, tk3); gotErr != nil && gotErr.Error() != wantErr.Error() {
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t.Errorf("err: got <%v>, want <nil>", gotErr)
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}
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}
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func TestAddUnknownTokens(t *testing.T) {
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tk0 := NewToken(0, 0, SymPercent, "%")
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wantErr := errors.New(`unexpected token "%"`)
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tree := NewAst()
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if _, gotErr := tree.addToken(tk0); gotErr != nil && gotErr.Error() != wantErr.Error() {
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t.Errorf("err: got <%v>, want <%v>", gotErr, wantErr)
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}
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}
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