99 lines
3.5 KiB
Go
99 lines
3.5 KiB
Go
// Copyright (c) 2020 Alexander Kiryukhin <a.kiryukhin@mail.ru>
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package executor
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import (
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"testing"
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)
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func TestTokenize(t *testing.T) {
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operators := map[string]*Operator{
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"+": {Op: "+", Assoc: LeftAssoc, Priority: 1, Fn: func(a float64, b float64) (float64, error) { return a + b, nil }},
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"-": {Op: "-", Assoc: LeftAssoc, Priority: 1, Fn: func(a float64, b float64) (float64, error) { return a - b, nil }},
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"*": {Op: "*", Assoc: LeftAssoc, Priority: 2, Fn: func(a float64, b float64) (float64, error) { return a * b, nil }},
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"/": {Op: "/", Assoc: LeftAssoc, Priority: 2, Fn: func(a float64, b float64) (float64, error) { return a / b, nil }},
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}
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tk := newTokenizer("((15/(7-(1+1)))*-3)-(-2+(1+1))", operators)
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if err := tk.tokenize(); err != nil {
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t.Error(err)
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}
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tkns, err := tk.toRPN()
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if err != nil {
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t.Error(err)
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}
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expected := []token{
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{literalType, "", 15},
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{literalType, "", 7},
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{literalType, "", 1},
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{literalType, "", 1},
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{operatorType, "+", 0},
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{operatorType, "-", 0},
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{operatorType, "/", 0},
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{literalType, "", -3},
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{operatorType, "*", 0},
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{literalType, "", -2},
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{literalType, "", 1},
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{literalType, "", 1},
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{operatorType, "+", 0},
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{operatorType, "+", 0},
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{operatorType, "-", 0},
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}
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if len(tkns) != len(expected) {
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t.Errorf("Expected len = %d, got %d", len(expected), len(tkns))
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}
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for i, tkn := range tkns {
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if tkn.Type != expected[i].Type {
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t.Errorf("Expected type %d, got %d at pos %d", expected[i].Type, tkn.Type, i)
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}
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if tkn.SValue != expected[i].SValue {
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t.Errorf("Expected %s, got %s at pos %d", expected[i].SValue, tkn.SValue, i)
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}
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if tkn.FValue != expected[i].FValue {
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t.Errorf("Expected %f, got %f at pos %d", expected[i].FValue, tkn.FValue, i)
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}
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}
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tk = newTokenizer("a**b==10", operators)
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if err := tk.tokenize(); err != nil {
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t.Error(err)
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}
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expected = []token{
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{variableType, "a", 0},
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{operatorType, "**", 0},
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{variableType, "b", 0},
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{operatorType, "==", 0},
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{literalType, "", 10},
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}
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if len(tk.tkns) != len(expected) {
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t.Errorf("Expected len = %d, got %d", len(expected), len(tkns))
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}
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for i, tkn := range tk.tkns {
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if tkn.Type != expected[i].Type {
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t.Errorf("Expected type %d, got %d at pos %d", expected[i].Type, tkn.Type, i)
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}
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if tkn.SValue != expected[i].SValue {
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t.Errorf("Expected %s, got %s at pos %d", expected[i].SValue, tkn.SValue, i)
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}
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if tkn.FValue != expected[i].FValue {
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t.Errorf("Expected %f, got %f at pos %d", expected[i].FValue, tkn.FValue, i)
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}
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}
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}
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