603 lines
23 KiB
C++
603 lines
23 KiB
C++
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// Adapted for GoogleTest from TestParser.cpp from OpenMM
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#include "lammps.h"
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#include "info.h"
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#include "input.h"
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#include "update.h"
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#include "variable.h"
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#include "../../src/LEPTON/lepton_utils.h"
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#include "Lepton.h"
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#include "lepton/CompiledVectorExpression.h"
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#include "utils.h"
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "../testing/core.h"
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#include <exception>
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#include <iostream>
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#include <limits>
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#include <map>
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#include <sstream>
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#include <string>
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using LAMMPS_NS::utils::split_words;
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using ::testing::StrEq;
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bool verbose = false;
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class LeptonUtilsTest : public LAMMPSTest {
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protected:
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LAMMPS_NS::Variable *variable;
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void SetUp() override
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{
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testbinary = "LeptonUtilsTest";
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args = {"-log", "none", "-echo", "screen", "-nocite", "-v", "num", "1"};
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LAMMPSTest::SetUp();
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BEGIN_HIDE_OUTPUT();
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command("region box block 0 1 0 1 0 1");
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command("create_box 1 box");
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END_HIDE_OUTPUT();
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variable = lmp->input->variable;
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}
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};
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// remove quotes and spaces from expression
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TEST(LeptonUtils, condense)
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{
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ASSERT_THAT(LeptonUtils::condense("\"k*r^2; k=250.0\""), StrEq("k*r^2;k=250.0"));
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ASSERT_THAT(LeptonUtils::condense("'k2*r^2 + k3*r^3 + k4*r^4; k2=300.0; k3=-100.0; k4=50.0'"),
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StrEq("k2*r^2+k3*r^3+k4*r^4;k2=300.0;k3=-100.0;k4=50.0"));
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ASSERT_THAT(LeptonUtils::condense("k*(r-0.2)^2;k=500.0"), StrEq("k*(r-0.2)^2;k=500.0"));
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ASSERT_THAT(LeptonUtils::condense("\"xx' \"'xx"), StrEq("xxxx"));
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ASSERT_THAT(LeptonUtils::condense("\t \"x\n\r"), StrEq("x"));
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}
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// substitute variable references (v_<name>) with values
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TEST_F(LeptonUtilsTest, substitute)
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{
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BEGIN_HIDE_OUTPUT();
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command("variable val1 index 100.0");
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command("variable pre equal 0.001*step");
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END_HIDE_OUTPUT();
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ASSERT_THAT(LeptonUtils::substitute("v_num", lmp), StrEq("1"));
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ASSERT_THAT(LeptonUtils::substitute("eps*v_val1*k", lmp), StrEq("eps*100.0*k"));
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ASSERT_THAT(LeptonUtils::substitute("(2.5/v_pre)", lmp), StrEq("(2.5/0)"));
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lmp->update->reset_timestep(100LL, false);
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ASSERT_THAT(LeptonUtils::substitute("(2.5/v_pre)", lmp), StrEq("(2.5/0.1)"));
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bool caught = false;
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try {
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LeptonUtils::substitute("v_none", lmp);
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} catch (std::exception &e) {
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ASSERT_THAT(e.what(), StrEq("Variable none in expression v_none does not exist"));
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caught = true;
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}
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ASSERT_TRUE(caught);
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}
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// zbl() custom function
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TEST(LeptonCustomFunction, zbl)
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{
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Lepton::ZBLFunction zbl(1.0, 1.0, 1.0);
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std::map<std::string, Lepton::CustomFunction *> functions = {std::make_pair("zbl", &zbl)};
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std::map<std::string, double> variables = {std::make_pair("zi", 6), std::make_pair("zj", 6),
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std::make_pair("r", 2.0)};
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auto parsed = Lepton::Parser::parse("zbl(zi, zj, r)", functions);
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auto zbldzi = parsed.differentiate("zi");
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auto zbldzj = parsed.differentiate("zj");
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auto zbldr = parsed.differentiate("r");
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auto zbld2r = zbldr.differentiate("r");
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double value = parsed.evaluate(variables);
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ASSERT_DOUBLE_EQ(value, 0.065721538245489763);
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value = zbldr.evaluate(variables);
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ASSERT_DOUBLE_EQ(value, -0.15481915325334394);
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variables["r"] = 1.0;
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value = parsed.evaluate(variables);
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ASSERT_DOUBLE_EQ(value, 1.0701488641432269);
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value = zbldr.evaluate(variables);
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ASSERT_DOUBLE_EQ(value, -3.6376386525054412);
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variables["zi"] = 13.0;
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value = parsed.evaluate(variables);
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ASSERT_DOUBLE_EQ(value, 1.8430432789454971);
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value = zbldr.evaluate(variables);
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ASSERT_DOUBLE_EQ(value, -6.5373118484557642);
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variables["zj"] = 13.0;
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value = parsed.evaluate(variables);
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ASSERT_DOUBLE_EQ(value, 3.1965196467438446);
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value = zbldr.evaluate(variables);
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ASSERT_DOUBLE_EQ(value, -11.804490148948526);
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// check for unsupported derivatives
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ASSERT_ANY_THROW(value = zbldzi.evaluate(variables));
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ASSERT_ANY_THROW(value = zbldzj.evaluate(variables));
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ASSERT_ANY_THROW(value = zbld2r.evaluate(variables));
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}
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/**
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* This is a custom function equal to f(x,y) = 2*x*y.
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*/
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class ExampleFunction : public Lepton::CustomFunction {
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int getNumArguments() const override { return 2; }
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double evaluate(const double *arguments) const override
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{
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return 2.0 * arguments[0] * arguments[1];
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}
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double evaluateDerivative(const double *arguments, const int *derivOrder) const override
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{
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if (derivOrder[0] == 1) {
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if (derivOrder[1] == 0)
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return 2.0 * arguments[1];
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else if (derivOrder[1] == 1)
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return 2.0;
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}
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if (derivOrder[1] == 1 && derivOrder[0] == 0) return 2.0 * arguments[0];
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return 0.0;
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}
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Lepton::CustomFunction *clone() const override { return new ExampleFunction(); }
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};
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/**
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* Verify that an expression gives the correct value.
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*/
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void verifyEvaluation(const std::string &expression, double expectedValue)
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{
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std::map<std::string, Lepton::CustomFunction *> customFunctions;
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Lepton::ParsedExpression parsed = Lepton::Parser::parse(expression, customFunctions);
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double value = parsed.evaluate();
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ASSERT_NEAR(expectedValue, value, 1e-10);
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// Try optimizing it and make sure the result is still correct.
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value = parsed.optimize().evaluate();
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ASSERT_NEAR(expectedValue, value, 1e-10);
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// Create an ExpressionProgram and see if that also gives the same result.
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Lepton::ExpressionProgram program = parsed.createProgram();
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value = program.evaluate();
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ASSERT_NEAR(expectedValue, value, 1e-10);
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// Create a CompiledExpression and see if that also gives the same result.
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Lepton::CompiledExpression compiled = parsed.createCompiledExpression();
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value = compiled.evaluate();
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ASSERT_NEAR(expectedValue, value, 1e-10);
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}
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/**
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* Verify that an expression with variables gives the correct value.
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*/
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void verifyEvaluation(const std::string &expression, double x, double y, double expectedValue)
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{
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if (verbose) std::cout << "Checking expression: " << expression << "\n";
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std::map<std::string, double> variables;
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variables["x"] = x;
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variables["y"] = y;
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Lepton::ParsedExpression parsed = Lepton::Parser::parse(expression);
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double value = parsed.evaluate(variables);
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ASSERT_NEAR(expectedValue, value, 1e-10);
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// Try optimizing it and make sure the result is still correct.
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value = parsed.optimize().evaluate(variables);
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ASSERT_NEAR(expectedValue, value, 1e-10);
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// Try optimizing with predefined values for the variables.
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value = parsed.optimize(variables).evaluate();
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ASSERT_NEAR(expectedValue, value, 1e-10);
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// Create an ExpressionProgram and see if that also gives the same result.
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Lepton::ExpressionProgram program = parsed.createProgram();
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value = program.evaluate(variables);
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ASSERT_NEAR(expectedValue, value, 1e-10);
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// Create a CompiledExpression and see if that also gives the same result.
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Lepton::CompiledExpression compiled = parsed.createCompiledExpression();
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if (compiled.getVariables().find("x") != compiled.getVariables().end())
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compiled.getVariableReference("x") = x;
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if (compiled.getVariables().find("y") != compiled.getVariables().end())
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compiled.getVariableReference("y") = y;
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value = compiled.evaluate();
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ASSERT_NEAR(expectedValue, value, 1e-10);
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// Try specifying memory locations for the compiled expression.
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std::map<std::string, double *> variablePointers;
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variablePointers["x"] = &x;
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variablePointers["y"] = &y;
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Lepton::CompiledExpression compiled2 = parsed.createCompiledExpression();
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compiled2.setVariableLocations(variablePointers);
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value = compiled2.evaluate();
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ASSERT_NEAR(expectedValue, value, 1e-10);
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ASSERT_EQ(&x, &compiled2.getVariableReference("x"));
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ASSERT_EQ(&y, &compiled2.getVariableReference("y"));
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// Try evaluating it as a vector.
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for (int width : Lepton::CompiledVectorExpression::getAllowedWidths()) {
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Lepton::CompiledVectorExpression vector = parsed.createCompiledVectorExpression(width);
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for (int i = 0; i < width; i++) {
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if (vector.getVariables().find("x") != vector.getVariables().end())
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for (int j = 0; j < width; j++)
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vector.getVariablePointer("x")[j] = (i == j ? x : -100.0);
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if (vector.getVariables().find("y") != vector.getVariables().end())
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for (int j = 0; j < width; j++)
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vector.getVariablePointer("y")[j] = (i == j ? y : -100.0);
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const float *result = vector.evaluate();
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ASSERT_NEAR(expectedValue, result[i], 1e-6);
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}
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}
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// Specify memory locations for the vector expression.
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float xvec[8], yvec[8];
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std::map<std::string, float *> vecVariablePointers;
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vecVariablePointers["x"] = xvec;
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vecVariablePointers["y"] = yvec;
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for (int width : Lepton::CompiledVectorExpression::getAllowedWidths()) {
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Lepton::CompiledVectorExpression vector2 = parsed.createCompiledVectorExpression(width);
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vector2.setVariableLocations(vecVariablePointers);
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for (int i = 0; i < width; i++) {
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for (int j = 0; j < width; j++) {
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xvec[j] = (i == j ? x : -100.0);
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yvec[j] = (i == j ? y : -100.0);
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}
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const float *result = vector2.evaluate();
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ASSERT_NEAR(expectedValue, result[i], 1e-6);
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}
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}
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// Make sure that variable renaming works.
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variables.clear();
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variables["w"] = x;
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variables["y"] = y;
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std::map<std::string, std::string> replacements;
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replacements["x"] = "w";
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value = parsed.renameVariables(replacements).evaluate(variables);
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ASSERT_NEAR(expectedValue, value, 1e-10);
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}
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/**
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* Confirm that a parse error gets thrown.
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*/
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void verifyInvalidExpression(const std::string &expression)
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{
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if (verbose) std::cout << "Checking invalid expression: " << expression << "\n";
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try {
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Lepton::Parser::parse(expression);
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} catch (const std::exception &) {
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return;
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}
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throw std::exception();
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}
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/**
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* Verify that two numbers have the same value.
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*/
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void assertNumbersEqual(double val1, double val2, double tol = 1e-10)
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{
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const double inf = std::numeric_limits<double>::infinity();
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if (val1 == val1 || val2 == val2) // If both are NaN, that's fine.
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if (val1 != inf || val2 != inf) // Both infinity is also fine.
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if (val1 != -inf || val2 != -inf) { // Same for -infinity.
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ASSERT_NEAR(val1, val2, tol);
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}
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}
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/**
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* Verify that two expressions give the same value.
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*/
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void verifySameValue(const Lepton::ParsedExpression &exp1, const Lepton::ParsedExpression &exp2,
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double x, double y)
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{
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std::map<std::string, double> variables;
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variables["x"] = x;
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variables["y"] = y;
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double val1 = exp1.evaluate(variables);
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double val2 = exp2.evaluate(variables);
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assertNumbersEqual(val1, val2);
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// Now create CompiledExpressions from them and see if those also match.
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Lepton::CompiledExpression compiled1 = exp1.createCompiledExpression();
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Lepton::CompiledExpression compiled2 = exp2.createCompiledExpression();
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if (compiled1.getVariables().find("x") != compiled1.getVariables().end())
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compiled1.getVariableReference("x") = x;
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if (compiled1.getVariables().find("y") != compiled1.getVariables().end())
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compiled1.getVariableReference("y") = y;
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if (compiled2.getVariables().find("x") != compiled2.getVariables().end())
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compiled2.getVariableReference("x") = x;
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if (compiled2.getVariables().find("y") != compiled2.getVariables().end())
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compiled2.getVariableReference("y") = y;
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assertNumbersEqual(val1, compiled1.evaluate());
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assertNumbersEqual(val2, compiled2.evaluate());
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// Now check CompiledVectorizedExpressions.
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for (int width : Lepton::CompiledVectorExpression::getAllowedWidths()) {
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Lepton::CompiledVectorExpression vector1 = exp1.createCompiledVectorExpression(width);
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Lepton::CompiledVectorExpression vector2 = exp2.createCompiledVectorExpression(width);
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for (int i = 0; i < width; i++) {
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if (vector1.getVariables().find("x") != vector1.getVariables().end())
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for (int j = 0; j < width; j++)
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vector1.getVariablePointer("x")[j] = (i == j ? x : -100.0);
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if (vector1.getVariables().find("y") != vector1.getVariables().end())
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for (int j = 0; j < width; j++)
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vector1.getVariablePointer("y")[j] = (i == j ? y : -100.0);
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if (vector2.getVariables().find("x") != vector2.getVariables().end())
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for (int j = 0; j < width; j++)
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vector2.getVariablePointer("x")[j] = (i == j ? x : -100.0);
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if (vector2.getVariables().find("y") != vector2.getVariables().end())
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for (int j = 0; j < width; j++)
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vector2.getVariablePointer("y")[j] = (i == j ? y : -100.0);
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const float *result1 = vector1.evaluate();
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const float *result2 = vector2.evaluate();
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assertNumbersEqual(val1, result1[i], 5e-6);
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assertNumbersEqual(val2, result2[i], 5e-6);
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}
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}
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}
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/**
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* Verify that the derivative of an expression is calculated correctly.
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*/
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void verifyDerivative(const std::string &expression, const std::string &expectedDeriv)
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{
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if (verbose) std::cout << "Checking derivative of: " << expression << "\n";
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Lepton::ParsedExpression computed =
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Lepton::Parser::parse(expression).differentiate("x").optimize();
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Lepton::ParsedExpression expected = Lepton::Parser::parse(expectedDeriv);
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verifySameValue(computed, expected, 1.0, 2.0);
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verifySameValue(computed, expected, 2.0, 3.0);
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verifySameValue(computed, expected, -2.0, 3.0);
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verifySameValue(computed, expected, 2.0, -3.0);
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verifySameValue(computed, expected, 0.0, -3.0);
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verifySameValue(computed, expected, 2.0, 0.0);
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}
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/**
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* Test the use of a custom function.
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*/
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void testCustomFunction(const std::string &expression, const std::string &equivalent)
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{
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if (verbose) std::cout << "Checking custom function expression: " << expression << "\n";
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std::map<std::string, Lepton::CustomFunction *> functions;
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ExampleFunction exp;
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functions["custom"] = &exp;
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Lepton::ParsedExpression exp1 = Lepton::Parser::parse(expression, functions);
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Lepton::ParsedExpression exp2 = Lepton::Parser::parse(equivalent);
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verifySameValue(exp1, exp2, 1.0, 2.0);
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verifySameValue(exp1, exp2, 2.0, 3.0);
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verifySameValue(exp1, exp2, -2.0, 3.0);
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verifySameValue(exp1, exp2, 2.0, -3.0);
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Lepton::ParsedExpression deriv1 = exp1.differentiate("x").optimize();
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Lepton::ParsedExpression deriv2 = exp2.differentiate("x").optimize();
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verifySameValue(deriv1, deriv2, 1.0, 2.0);
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verifySameValue(deriv1, deriv2, 2.0, 3.0);
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verifySameValue(deriv1, deriv2, -2.0, 3.0);
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verifySameValue(deriv1, deriv2, 2.0, -3.0);
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Lepton::ParsedExpression deriv3 = deriv1.differentiate("y").optimize();
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Lepton::ParsedExpression deriv4 = deriv2.differentiate("y").optimize();
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verifySameValue(deriv3, deriv4, 1.0, 2.0);
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verifySameValue(deriv3, deriv4, 2.0, 3.0);
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verifySameValue(deriv3, deriv4, -2.0, 3.0);
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verifySameValue(deriv3, deriv4, 2.0, -3.0);
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}
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TEST(Lepton, Evaluation)
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{
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verifyEvaluation("5", 5.0);
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verifyEvaluation("5*2", 10.0);
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verifyEvaluation("2*3+4*5", 26.0);
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verifyEvaluation("2^-3", 0.125);
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verifyEvaluation("1e+2", 100.0);
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verifyEvaluation("-x", 2.0, 3.0, -2.0);
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verifyEvaluation("y^-x", 3.0, 2.0, 0.125);
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verifyEvaluation("1/-x", 3.0, 2.0, -1.0 / 3.0);
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verifyEvaluation("2.1e-4*x*(y+1)", 3.0, 1.0, 1.26e-3);
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verifyEvaluation("sin(2.5)", std::sin(2.5));
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verifyEvaluation("cot(x)", 3.0, 1.0, 1.0 / std::tan(3.0));
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verifyEvaluation("log(x)", 3.0, 1.0, std::log(3.0));
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verifyEvaluation("x^2+y^3+x^-1+y^(1/2)", 1.0, 1.0, 4.0);
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verifyEvaluation("(2*x)*3", 4.0, 4.0, 24.0);
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verifyEvaluation("(x*2)*3", 4.0, 4.0, 24.0);
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verifyEvaluation("2*(x*3)", 4.0, 4.0, 24.0);
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verifyEvaluation("2*(3*x)", 4.0, 4.0, 24.0);
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verifyEvaluation("2*x/3", 1.0, 4.0, 2.0 / 3.0);
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verifyEvaluation("x*2/3", 1.0, 4.0, 2.0 / 3.0);
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verifyEvaluation("5*(-x)*(-y)", 1.0, 4.0, 20.0);
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verifyEvaluation("5*(-x)*(y)", 1.0, 4.0, -20.0);
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verifyEvaluation("5*(x)*(-y)", 1.0, 4.0, -20.0);
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verifyEvaluation("5*(-x)/(-y)", 1.0, 4.0, 1.25);
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verifyEvaluation("5*(-x)/(y)", 1.0, 4.0, -1.25);
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verifyEvaluation("5*(x)/(-y)", 1.0, 4.0, -1.25);
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verifyEvaluation("x+(-y)", 1.0, 4.0, -3.0);
|
|
verifyEvaluation("(-x)+y", 1.0, 4.0, 3.0);
|
|
verifyEvaluation("x/(1/y)", 1.0, 4.0, 4.0);
|
|
verifyEvaluation("x*w; w = 5", 3.0, 1.0, 15.0);
|
|
verifyEvaluation("a+b^2;a=x-b;b=3*y", 2.0, 3.0, 74.0);
|
|
verifyEvaluation("erf(x)+erfc(x)", 2.0, 3.0, 1.0);
|
|
verifyEvaluation("min(3, x)", 2.0, 3.0, 2.0);
|
|
verifyEvaluation("min(y, 5)", 2.0, 3.0, 3.0);
|
|
verifyEvaluation("max(x, y)", 2.0, 3.0, 3.0);
|
|
verifyEvaluation("max(x, -1)", 2.0, 3.0, 2.0);
|
|
verifyEvaluation("abs(x-y)", 2.0, 3.0, 1.0);
|
|
verifyEvaluation("delta(x)+3*delta(y-1.5)", 2.0, 1.5, 3.0);
|
|
verifyEvaluation("step(x-3)+y*step(x)", 2.0, 3.0, 3.0);
|
|
verifyEvaluation("floor(x)", -2.1, 3.0, -3.0);
|
|
verifyEvaluation("ceil(x)", -2.1, 3.0, -2.0);
|
|
verifyEvaluation("select(x, 1.0, y)", 0.3, 2.0, 1.0);
|
|
verifyEvaluation("select(x, 1.0, y)", 0.0, 2.0, 2.0);
|
|
verifyEvaluation("atan2(x, y)", 3.0, 1.5, std::atan(2.0));
|
|
verifyEvaluation("sqrt(x^2)", -2.2, 0.0, 2.2);
|
|
verifyEvaluation("sqrt(x)^2", 2.2, 0.0, 2.2);
|
|
verifyEvaluation("x^2+x^4", 2.0, 0.0, 20.0);
|
|
verifyEvaluation("x^-2+x^-3", 2.0, 0.0, 0.375);
|
|
verifyEvaluation("x^1.8", 2.2, 0.0, std::pow(2.2, 1.8));
|
|
}
|
|
|
|
TEST(Lepton, InvalidEvaluation)
|
|
{
|
|
ASSERT_NO_THROW(verifyInvalidExpression("1..2"));
|
|
ASSERT_NO_THROW(verifyInvalidExpression("1*(2+3"));
|
|
ASSERT_NO_THROW(verifyInvalidExpression("5++4"));
|
|
ASSERT_NO_THROW(verifyInvalidExpression("1+2)"));
|
|
ASSERT_NO_THROW(verifyInvalidExpression("cos(2,3)"));
|
|
}
|
|
|
|
TEST(Lepton, VerifyDerivative)
|
|
{
|
|
verifyDerivative("x", "1");
|
|
verifyDerivative("x^2+x", "2*x+1");
|
|
verifyDerivative("y^x-x", "log(y)*(y^x)-1");
|
|
verifyDerivative("sin(x)", "cos(x)");
|
|
verifyDerivative("cos(x)", "-sin(x)");
|
|
verifyDerivative("tan(x)", "square(sec(x))");
|
|
verifyDerivative("cot(x)", "-square(csc(x))");
|
|
verifyDerivative("sec(x)", "sec(x)*tan(x)");
|
|
verifyDerivative("csc(x)", "-csc(x)*cot(x)");
|
|
verifyDerivative("exp(2*x)", "2*exp(2*x)");
|
|
verifyDerivative("log(x)", "1/x");
|
|
verifyDerivative("sqrt(x)", "0.5/sqrt(x)");
|
|
verifyDerivative("asin(x)", "1/sqrt(1-x^2)");
|
|
verifyDerivative("acos(x)", "-1/sqrt(1-x^2)");
|
|
verifyDerivative("atan(x)", "1/(1+x^2)");
|
|
verifyDerivative("atan2(2*x,y)", "2*y/(4*x^2+y^2)");
|
|
verifyDerivative("sinh(x)", "cosh(x)");
|
|
verifyDerivative("cosh(x)", "sinh(x)");
|
|
verifyDerivative("tanh(x)", "1/(cosh(x)^2)");
|
|
verifyDerivative("erf(x)", "1.12837916709551*exp(-x^2)");
|
|
verifyDerivative("erfc(x)", "-1.12837916709551*exp(-x^2)");
|
|
verifyDerivative("step(x)*x+step(1-x)*2*x", "step(x)+step(1-x)*2");
|
|
verifyDerivative("recip(x)", "-1/x^2");
|
|
verifyDerivative("square(x)", "2*x");
|
|
verifyDerivative("cube(x)", "3*x^2");
|
|
verifyDerivative("min(x, 2*x)", "step(x-2*x)*2+(1-step(x-2*x))*1");
|
|
verifyDerivative("max(5, x^2)", "(1-step(5-x^2))*2*x");
|
|
verifyDerivative("abs(3*x)", "step(3*x)*3+(1-step(3*x))*-3");
|
|
verifyDerivative("floor(x)+0.5*x*ceil(x)", "0.5*ceil(x)");
|
|
verifyDerivative("select(x, x^2, 3*x)", "select(x, 2*x, 3)");
|
|
}
|
|
|
|
TEST(Lepton, CustomFunction)
|
|
{
|
|
testCustomFunction("custom(x, y)/2", "x*y");
|
|
testCustomFunction("custom(x^2, 1)+custom(2, y-1)", "2*x^2+4*(y-1)");
|
|
}
|
|
|
|
TEST(Lepton, Optimize)
|
|
{
|
|
std::string buffer;
|
|
std::stringstream out(buffer);
|
|
|
|
out << Lepton::Parser::parse("x*x").optimize();
|
|
ASSERT_THAT(out.str(), StrEq("square(x)"));
|
|
out.str("");
|
|
|
|
out << Lepton::Parser::parse("x*x*x").optimize();
|
|
ASSERT_THAT(out.str(), StrEq("cube(x)"));
|
|
out.str("");
|
|
|
|
out << Lepton::Parser::parse("x*(x*x)").optimize();
|
|
ASSERT_THAT(out.str(), StrEq("cube(x)"));
|
|
out.str("");
|
|
|
|
out << Lepton::Parser::parse("(x*x)*x").optimize();
|
|
ASSERT_THAT(out.str(), StrEq("cube(x)"));
|
|
out.str("");
|
|
|
|
out << Lepton::Parser::parse("2*3*x").optimize();
|
|
ASSERT_THAT(out.str(), StrEq("6*(x)"));
|
|
out.str("");
|
|
|
|
out << Lepton::Parser::parse("1/(1+x)").optimize();
|
|
ASSERT_THAT(out.str(), StrEq("recip(1+(x))"));
|
|
out.str("");
|
|
|
|
out << Lepton::Parser::parse("x^(1/2)").optimize();
|
|
ASSERT_THAT(out.str(), StrEq("sqrt(x)"));
|
|
out.str("");
|
|
out << Lepton::Parser::parse("log(3*cos(x))^(sqrt(4)-2)").optimize();
|
|
ASSERT_THAT(out.str(), StrEq("1"));
|
|
out.str("");
|
|
}
|
|
|
|
TEST(Lepton, Exception)
|
|
{
|
|
Lepton::CompiledExpression function, derivative;
|
|
|
|
auto parsed = Lepton::Parser::parse("x*x");
|
|
function = parsed.createCompiledExpression();
|
|
derivative = parsed.differentiate("x").createCompiledExpression();
|
|
|
|
double x = 1.5;
|
|
EXPECT_NO_THROW(function.getVariableReference("x") = x;);
|
|
EXPECT_NO_THROW(derivative.getVariableReference("x") = x;);
|
|
EXPECT_DOUBLE_EQ(function.evaluate(), 2.25);
|
|
EXPECT_DOUBLE_EQ(derivative.evaluate(), 3.0);
|
|
|
|
parsed = Lepton::Parser::parse("x");
|
|
function = parsed.createCompiledExpression();
|
|
derivative = parsed.differentiate("x").createCompiledExpression();
|
|
|
|
x = 2.5;
|
|
EXPECT_NO_THROW(function.getVariableReference("x") = x;);
|
|
EXPECT_THROW(derivative.getVariableReference("x") = x;, Lepton::Exception);
|
|
EXPECT_DOUBLE_EQ(function.evaluate(), 2.5);
|
|
EXPECT_DOUBLE_EQ(derivative.evaluate(), 1.0);
|
|
|
|
parsed = Lepton::Parser::parse("1.0");
|
|
function = parsed.createCompiledExpression();
|
|
derivative = parsed.differentiate("x").createCompiledExpression();
|
|
|
|
x = 0.5;
|
|
EXPECT_THROW(function.getVariableReference("x") = x;, Lepton::Exception);
|
|
EXPECT_THROW(derivative.getVariableReference("x") = x;, Lepton::Exception);
|
|
EXPECT_DOUBLE_EQ(function.evaluate(), 1.0);
|
|
EXPECT_DOUBLE_EQ(derivative.evaluate(), 0.0);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
MPI_Init(&argc, &argv);
|
|
::testing::InitGoogleMock(&argc, argv);
|
|
|
|
// handle arguments passed via environment variable
|
|
if (const char *var = getenv("TEST_ARGS")) {
|
|
std::vector<std::string> env = split_words(var);
|
|
for (auto arg : env) {
|
|
if (arg == "-v") {
|
|
verbose = true;
|
|
}
|
|
}
|
|
}
|
|
if ((argc > 1) && (strcmp(argv[1], "-v") == 0)) verbose = true;
|
|
|
|
int rv = RUN_ALL_TESTS();
|
|
MPI_Finalize();
|
|
return rv;
|
|
}
|