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update: added more tests to interpreter #5

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merged 1 commit into from
Apr 14, 2024
Merged

update: added more tests to interpreter #5

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1 change: 0 additions & 1 deletion src/Interpreter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -114,7 +114,6 @@ void Interpreter::visitPrintStmnt(Print *stmnt) {

Object Interpreter::visitExprStmnt(Expression *stmnt) {
Object value = evaluate(stmnt->expression);
std::cout << value.str() << "\n";
return value;
}

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79 changes: 58 additions & 21 deletions test/TestInterpreter.cpp
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Expand Up @@ -7,14 +7,11 @@
#include "Scanner.h"
#include "gtest/gtest.h"
#include <Statement.h>
#include <iostream>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <vector>

TEST(InterpreterTest, TestInterpreterExpression) {
std::string test = "10 + (40 + (20 - 30) - 10) + 50;";
TEST(InterpreterTest, TestExpression) {
std::string test = "print(10 + (40 + (20 - 30) - 10) + 50);";
Scanner scan(test);
std::vector<Token> tokens = scan.scanTokens();
Parser p(tokens);
Expand All @@ -25,8 +22,8 @@ TEST(InterpreterTest, TestInterpreterExpression) {
ASSERT_EQ(result, "80.000000\n");
}

TEST(InterpreterTest, TestInterpreterUnaryExpression) {
std::string test = "!true;";
TEST(InterpreterTest, TestUnaryExpression) {
std::string test = "print(!true);";
Scanner scan(test);
std::vector<Token> tokens = scan.scanTokens();
Parser p(tokens);
Expand All @@ -37,8 +34,8 @@ TEST(InterpreterTest, TestInterpreterUnaryExpression) {
ASSERT_EQ(result, "false\n");
}

TEST(InterpreterTest, TestParserTernaryExpression) {
std::string test = "3 > 1 ? true : false;";
TEST(InterpreterTest, TestTernaryExpression) {
std::string test = "print(3 > 1 ? true : false);";
Scanner scan(test);
std::vector<Token> tokens = scan.scanTokens();
Parser p(tokens);
Expand All @@ -49,28 +46,68 @@ TEST(InterpreterTest, TestParserTernaryExpression) {
ASSERT_EQ(result, "true\n");
}

TEST(InterpreterTest, TestInterpreterVarStatement) {
TEST(InterpreterTest, TestVarStatement) {

std::string test = "var a = 10; print(a);";
std::string test_f = "a = 10"; // fails

Scanner scan(test);
Scanner scan_f(test_f);

std::vector<Token> token = scan.scanTokens();
std::vector<Token> token_f = scan_f.scanTokens();

Parser parser(token);
Parser parser_f(token_f);

std::vector<Statement *> statement = parser.parse();

std::stringstream buffer;
std::streambuf *sbuf = std::cout.rdbuf();
std::cout.rdbuf(buffer.rdbuf());
testing::internal::CaptureStdout();
Interpreter{}.interpret(statement);
std::cout.rdbuf(sbuf);
ASSERT_EQ(buffer.str(), "10.000000\n");
std::string result = testing::internal::GetCapturedStdout();
ASSERT_EQ(result, "10.000000\n");
}

TEST(InterpreterTest, TestIfStatement) {
std::string test = "var a = 10; if(a>=10){print(\"equal\");}";
Scanner scan(test);
std::vector<Token> tokens = scan.scanTokens();
Parser p(tokens);
std::vector<Statement *> statements = p.parse();
testing::internal::CaptureStdout();
Interpreter{}.interpret(statements);
std::string result = testing::internal::GetCapturedStdout();
ASSERT_EQ(result, "equal\n");
}

TEST(InterpreterTest, TestIfElseStatement) {
std::string test =
"var a = 15; if(a==10){print(\"equal\");} else{print(\"Not equal\");}";
Scanner scan(test);
std::vector<Token> tokens = scan.scanTokens();
Parser p(tokens);
std::vector<Statement *> statements = p.parse();
testing::internal::CaptureStdout();
Interpreter{}.interpret(statements);
std::string result = testing::internal::GetCapturedStdout();
ASSERT_EQ(result, "Not equal\n");
}

EXPECT_THROW(parser_f.parse(), std::runtime_error);
TEST(InterpreterTest, TestWhileLoop) {
std::string test = "var a = 5; while(a > 0){ print(a); a = a-1;}";
Scanner scan(test);
std::vector<Token> tokens = scan.scanTokens();
Parser p(tokens);
std::vector<Statement *> statements = p.parse();
testing::internal::CaptureStdout();
Interpreter{}.interpret(statements);
std::string result = testing::internal::GetCapturedStdout();
ASSERT_EQ(result, "5.000000\n4.000000\n3.000000\n2.000000\n1.000000\n");
}

TEST(InterpreterTest, TestForLoop) {
std::string test = "for(var a = 0; a<5; a=a+1){print(a);}";
Scanner scan(test);
std::vector<Token> tokens = scan.scanTokens();
Parser p(tokens);
std::vector<Statement *> statements = p.parse();
testing::internal::CaptureStdout();
Interpreter{}.interpret(statements);
std::string result = testing::internal::GetCapturedStdout();
ASSERT_EQ(result, "0.000000\n1.000000\n2.000000\n3.000000\n4.000000\n");
}