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environment_tests.cpp
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environment_tests.cpp
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#include "catch.hpp"
#include "environment.hpp"
#include "semantic_error.hpp"
#include <cmath>
TEST_CASE( "Test default constructor", "[environment]" )
{
Environment env;
REQUIRE(env.is_known(Atom("pi")));
REQUIRE(env.is_exp(Atom("pi")));
REQUIRE(env.is_known(Atom("e")));
REQUIRE(env.is_exp(Atom("e")));
REQUIRE(env.is_known(Atom("I")));
REQUIRE(env.is_exp(Atom("I")));
REQUIRE(!env.is_known(Atom("hi")));
REQUIRE(!env.is_exp(Atom("hi")));
REQUIRE(env.is_proc(Atom("+")));
REQUIRE(env.is_proc(Atom("-")));
REQUIRE(env.is_proc(Atom("*")));
REQUIRE(env.is_proc(Atom("/")));
REQUIRE(env.is_proc(Atom("sqrt")));
REQUIRE(env.is_proc(Atom("^")));
REQUIRE(env.is_proc(Atom("ln")));
REQUIRE(env.is_proc(Atom("sin")));
REQUIRE(env.is_proc(Atom("cos")));
REQUIRE(env.is_proc(Atom("tan")));
REQUIRE(env.is_proc(Atom("real")));
REQUIRE(env.is_proc(Atom("imag")));
REQUIRE(env.is_proc(Atom("mag")));
REQUIRE(env.is_proc(Atom("arg")));
REQUIRE(env.is_proc(Atom("conj")));
REQUIRE(env.is_proc(Atom("list")));
REQUIRE(env.is_proc(Atom("first")));
REQUIRE(env.is_proc(Atom("rest")));
REQUIRE(env.is_proc(Atom("length")));
REQUIRE(env.is_proc(Atom("append")));
REQUIRE(env.is_proc(Atom("join")));
REQUIRE(env.is_proc(Atom("range")));
REQUIRE(!env.is_proc(Atom("op")));
}
TEST_CASE( "Test Lambda copy constructor", "[environment]" )
{
Environment env;
Environment clone1(env);
INFO("Copied environment must contain every single (key,value) of original");
REQUIRE(clone1 == env);
INFO("Adding to original default environment");
Expression a(Atom(1.0));
env.add_exp(Atom("one"), a);
REQUIRE(env.is_known(Atom("one")));
REQUIRE(env.is_exp(Atom("one")));
REQUIRE(env.get_exp(Atom("one")) == a);
REQUIRE(clone1 != env);
INFO("An environment copied from a non-default environment must reflect changes");
Environment clone2(env);
REQUIRE(clone2 == env);
REQUIRE(clone2 != clone1);
}
TEST_CASE( "Test get expression", "[environment]" ) {
Environment env;
REQUIRE(env.get_exp(Atom("pi")) == Expression(std::atan2(0, -1)));
REQUIRE(env.get_exp(Atom("hi")) == Expression());
}
TEST_CASE( "Test add expression", "[environment]" )
{
Environment env;
Expression a(Atom(1.0));
env.add_exp(Atom("one"), a);
REQUIRE(env.is_known(Atom("one")));
REQUIRE(env.is_exp(Atom("one")));
REQUIRE(env.get_exp(Atom("one")) == a);
Expression b(Atom("hello"));
env.add_exp(Atom("hi"), b);
REQUIRE(env.is_known(Atom("hi")));
REQUIRE(env.is_exp(Atom("hi")));
REQUIRE(env.get_exp(Atom("hi")) == b);
REQUIRE_THROWS_AS(env.add_exp(Atom(1.0), b), SemanticError);
}
TEST_CASE( "Test get built-in procedure", "[environment]" )
{
Environment env;
INFO("default procedure")
Procedure p1 = env.get_proc(Atom("doesnotexist"));
Procedure p2 = env.get_proc(Atom("alsodoesnotexist"));
REQUIRE(p1 == p2);
std::vector<Expression> args;
REQUIRE(p1(args) == Expression());
REQUIRE(p2(args) == Expression());
INFO("trying add procedure")
Procedure padd = env.get_proc(Atom("+"));
args.emplace_back(1.0);
args.emplace_back(2.0);
REQUIRE(padd(args) == Expression(3.0));
}
TEST_CASE( "Test reset", "[environment]" )
{
Environment env;
Expression a(Atom(1.0));
env.add_exp(Atom("one"), a);
Expression b(Atom("hello"));
env.add_exp(Atom("hi"), b);
env.reset();
REQUIRE(!env.is_known(Atom("one")));
REQUIRE(!env.is_exp(Atom("one")));
REQUIRE(env.get_exp(Atom("one")) == Expression());
REQUIRE(!env.is_known(Atom("hi")));
REQUIRE(!env.is_exp(Atom("hi")));
REQUIRE(env.get_exp(Atom("hi")) == Expression());
}
TEST_CASE( "Test semantic errors", "[environment]" )
{
Environment env;
{
Expression exp(Atom("begin"));
REQUIRE_THROWS_AS(exp.eval(env), SemanticError);
}
}