源代碼：https://gitee.com/shentuzhigang/demo-project/tree/master/test-calculator

測試代碼

package io.shentuzhigang.demo.test;import org.junit.Test;public class CalculatorTest {@Test(timeout = 4000)public void test00() throws Throwable {Calculator.expParser = new ExpressionParser(3);try {Calculator.evaluate("x + y");} catch (MissingOperandException e) {e.getOperator();e.printStackTrace();}Calculator.expParser.addVariable("$","x");Calculator.expParser.addVariable("x", "3");Calculator.expParser.parseVariables("x");Calculator.expParser.addVariable("x", "2");Calculator.expParser.evaluate("y = 1");try {Calculator.expParser.evaluate("y = 1.x");}catch (Exception e){e.printStackTrace();}}@Test(timeout = 4000)public void test01() throws Throwable {Calculator.parseCommand("list funcs");Calculator.parseCommand("list vars");Calculator.parseCommand("list");Calculator.parseCommand("help cmds");Calculator.parseCommand("help funcs");Calculator.parseCommand("help vars");Calculator.parseCommand("help");Calculator.parseCommand("exit");try {Calculator.parseCommand("test");} catch (CommandNotFoundException e) {e.getCommand();e.printStackTrace();}}@Test(timeout = 4000)public void test02() throws Throwable {Calculator.evaluate("1^1");Calculator.evaluate("1%1");Calculator.evaluate("1/1");Calculator.evaluate("1*1.111");Calculator.evaluate("1+1");Calculator.evaluate("1-(1*1)");Calculator.evaluate("(1 - 2 + 3) - 5");Calculator.evaluate("sin[1]");Calculator.evaluate("cos[1]");Calculator.evaluate("tan[1]");Calculator.evaluate("csc[1]");Calculator.evaluate("sec[1]");Calculator.evaluate("ctn[1]");Calculator.evaluate("rad[1]");Calculator.evaluate("deg[1]");Calculator.evaluate("fct[1]");Calculator.evaluate("fct[11]");Calculator.evaluate("abs[1]");Calculator.evaluate("exp[1]");Calculator.evaluate("log[1]");Calculator.evaluate("-log[1]");try {Calculator.evaluate("test[1]");} catch (FunctionNotFoundException e) {e.getFunc();e.printStackTrace();}try {Calculator.evaluate("log[]");} catch (MissingOperandException e) {e.getFaultyExpression();e.printStackTrace();}try {Calculator.evaluate("log[");} catch (UnmatchedBracketsException e) {e.getFaultyExpression();e.printStackTrace();}try {Calculator.evaluate("log[(1+1]");} catch (UnmatchedBracketsException e) {e.getFaultyExpression();e.getIndexOfBracket();e.printStackTrace();}try {Calculator.evaluate("log[<a>]");} catch (VariableNotFoundException e) {e.getFaultyExpression();e.getVar();e.printStackTrace();}}@Test(timeout = 4000)public void test03() throws Throwable {try {Calculator.evaluate("");} catch (NullExpressionException e) {e.getFaultyExpression();e.printStackTrace();}try {Calculator.evaluate("(1+1");} catch (UnmatchedBracketsException e) {e.getFaultyExpression();e.getIndexOfBracket();e.printStackTrace();}try {Calculator.evaluate("<a>+<b>");} catch (VariableNotFoundException e) {e.getFaultyExpression();e.getVar();e.printStackTrace();}// fixedVariableNotFoundException e = new VariableNotFoundException("x");} }

測試結果

參考文章

總結

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