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// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <gtest/gtest.h>
#include "cras_expr.h"
namespace {
TEST(ExprTest, UnparsibleExpression) {
struct cras_expr_expression* expr;
/* un-parsable input */
expr = cras_expr_expression_parse("#");
EXPECT_EQ(NULL, expr);
expr = cras_expr_expression_parse(NULL);
EXPECT_EQ(NULL, expr);
cras_expr_expression_free(expr);
}
TEST(ExprTest, LiteralExpression) {
struct cras_expr_expression* expr;
struct cras_expr_value value = CRAS_EXPR_VALUE_INIT;
struct cras_expr_env env = CRAS_EXPR_ENV_INIT;
int integer = 0;
/* parse integer literal */
expr = cras_expr_expression_parse(" -2");
EXPECT_EQ(EXPR_TYPE_LITERAL, expr->type);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_INT, expr->u.literal.type);
EXPECT_EQ(-2, expr->u.literal.u.integer);
/* evaluate integer literal */
cras_expr_expression_eval(expr, &env, &value);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_INT, value.type);
EXPECT_EQ(-2, value.u.integer);
EXPECT_EQ(0, cras_expr_expression_eval_int(expr, &env, &integer));
EXPECT_EQ(-2, integer);
cras_expr_expression_free(expr);
/* parse string literal */
expr = cras_expr_expression_parse("\"hello\" ");
EXPECT_EQ(EXPR_TYPE_LITERAL, expr->type);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_STRING, expr->u.literal.type);
EXPECT_STREQ("hello", expr->u.literal.u.string);
/* evaluate string literal */
cras_expr_expression_eval(expr, &env, &value);
ASSERT_EQ(CRAS_EXPR_VALUE_TYPE_STRING, value.type);
EXPECT_STREQ("hello", value.u.string);
cras_expr_value_free(&value);
cras_expr_expression_free(expr);
cras_expr_env_free(&env);
}
TEST(ExprTest, Variable) {
struct cras_expr_expression* expr;
struct cras_expr_value value = CRAS_EXPR_VALUE_INIT;
struct cras_expr_env env = CRAS_EXPR_ENV_INIT;
int integer = 0;
/* parse variable */
expr = cras_expr_expression_parse("a");
ASSERT_EQ(EXPR_TYPE_VARIABLE, expr->type);
EXPECT_STREQ("a", expr->u.variable);
/* evaluate variable (undefined now) */
cras_expr_expression_eval(expr, &env, &value);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_NONE, value.type);
/* undefined variable */
EXPECT_EQ(-1, cras_expr_expression_eval_int(expr, &env, &integer));
/* now define a variable with integer value 2 */
cras_expr_env_set_variable_integer(&env, "a", 2);
/* re-evaluate the variable */
EXPECT_EQ(0, cras_expr_expression_eval_int(expr, &env, &integer));
EXPECT_EQ(2, integer);
cras_expr_value_free(&value);
cras_expr_expression_free(expr);
cras_expr_env_free(&env);
}
TEST(ExprTest, Compound) {
struct cras_expr_expression *expr, *expr1, *expr2;
struct cras_expr_value value = CRAS_EXPR_VALUE_INIT;
struct cras_expr_env env = CRAS_EXPR_ENV_INIT;
/* parse empty compound expression */
expr = cras_expr_expression_parse("()");
ASSERT_EQ(EXPR_TYPE_COMPOUND, expr->type);
EXPECT_EQ(0, ARRAY_COUNT(&expr->u.children));
/* evaluate empty compound expression */
cras_expr_expression_eval(expr, &env, &value);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_NONE, value.type);
cras_expr_expression_free(expr);
/* parse non-empty compound expression */
expr = cras_expr_expression_parse("(foo bar)");
ASSERT_EQ(EXPR_TYPE_COMPOUND, expr->type);
EXPECT_EQ(2, ARRAY_COUNT(&expr->u.children));
/* evaluate non-empty compound expression */
cras_expr_expression_eval(expr, &env, &value);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_NONE, value.type);
cras_expr_expression_free(expr);
/* parse nested compound expression */
expr = cras_expr_expression_parse("((foo 3)bar )");
ASSERT_EQ(EXPR_TYPE_COMPOUND, expr->type);
ASSERT_EQ(2, ARRAY_COUNT(&expr->u.children));
expr1 = *ARRAY_ELEMENT(&expr->u.children, 0);
ASSERT_EQ(EXPR_TYPE_COMPOUND, expr1->type);
ASSERT_EQ(2, ARRAY_COUNT(&expr1->u.children));
expr2 = *ARRAY_ELEMENT(&expr1->u.children, 1);
ASSERT_EQ(EXPR_TYPE_LITERAL, expr2->type);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_INT, expr2->u.literal.type);
EXPECT_EQ(3, expr2->u.literal.u.integer);
/* evaluate nested compound expression */
cras_expr_expression_eval(expr, &env, &value);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_NONE, value.type);
cras_expr_expression_free(expr);
cras_expr_value_free(&value);
cras_expr_env_free(&env);
}
TEST(ExprTest, Environment) {
struct cras_expr_expression* expr;
struct cras_expr_value value = CRAS_EXPR_VALUE_INIT;
struct cras_expr_env env1 = CRAS_EXPR_ENV_INIT;
struct cras_expr_env env2 = CRAS_EXPR_ENV_INIT;
int integer = 0;
char boolean = 0;
/* parse variable */
expr = cras_expr_expression_parse("baz");
/* put baz=4 into env1 */
cras_expr_env_set_variable_integer(&env1, "baz", 4);
/* evaluate expr against env1 and env2 */
EXPECT_EQ(0, cras_expr_expression_eval_int(expr, &env1, &integer));
EXPECT_EQ(4, integer);
EXPECT_EQ(-1, cras_expr_expression_eval_int(expr, &env2, &integer));
/* put baz=5 into env2 */
cras_expr_env_set_variable_integer(&env2, "baz", 5);
/* evaluate again */
EXPECT_EQ(0, cras_expr_expression_eval_int(expr, &env1, &integer));
EXPECT_EQ(4, integer);
EXPECT_EQ(0, cras_expr_expression_eval_int(expr, &env2, &integer));
EXPECT_EQ(5, integer);
/* an integer is not a boolean */
EXPECT_EQ(-1, cras_expr_expression_eval_boolean(expr, &env2, &boolean));
cras_expr_value_free(&value);
cras_expr_expression_free(expr);
cras_expr_env_free(&env1);
cras_expr_env_free(&env2);
}
static void expect_int(int expected,
const char* str,
struct cras_expr_env* env) {
struct cras_expr_expression* expr;
struct cras_expr_value value = CRAS_EXPR_VALUE_INIT;
expr = cras_expr_expression_parse(str);
cras_expr_expression_eval(expr, env, &value);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_INT, value.type);
EXPECT_EQ(expected, value.u.integer);
cras_expr_expression_free(expr);
}
static void expect_boolean(char expected,
const char* str,
struct cras_expr_env* env) {
struct cras_expr_expression* expr;
struct cras_expr_value value = CRAS_EXPR_VALUE_INIT;
expr = cras_expr_expression_parse(str);
cras_expr_expression_eval(expr, env, &value);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_BOOLEAN, value.type);
EXPECT_EQ(expected, value.u.boolean);
cras_expr_expression_free(expr);
}
TEST(ExprTest, Builtin) {
struct cras_expr_expression* expr;
struct cras_expr_value value = CRAS_EXPR_VALUE_INIT;
struct cras_expr_env env = CRAS_EXPR_ENV_INIT;
cras_expr_env_install_builtins(&env);
/* parse variable */
expr = cras_expr_expression_parse("or");
cras_expr_expression_eval(expr, &env, &value);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_FUNCTION, value.type);
cras_expr_expression_free(expr);
/* test builtin functions */
expect_boolean(1, "(and)", &env);
expect_boolean(1, "(and #t)", &env);
expect_boolean(1, "(and #t #t)", &env);
expect_int(3, "(and 1 2 3)", &env);
expect_boolean(0, "(and #f 4)", &env);
expect_boolean(0, "(or)", &env);
expect_boolean(1, "(or #t)", &env);
expect_boolean(0, "(or #f #f)", &env);
expect_int(2, "(or #f #f 2)", &env);
expect_int(3, "(or #f (or 3))", &env);
expect_boolean(0, "(equal? \"hello\" 3)", &env);
expect_boolean(1, "(equal? \"hello\" \"hello\")", &env);
/* a more complex example a="hello" b="world"*/
expr = cras_expr_expression_parse("(or (equal? \"test\" a) b)");
cras_expr_env_set_variable_string(&env, "a", "hello");
cras_expr_env_set_variable_string(&env, "b", "world");
cras_expr_expression_eval(expr, &env, &value);
EXPECT_EQ(CRAS_EXPR_VALUE_TYPE_STRING, value.type);
EXPECT_STREQ("world", value.u.string);
cras_expr_expression_free(expr);
cras_expr_value_free(&value);
cras_expr_env_free(&env);
}
} // namespace
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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