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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/stllike/replace_variable.h>
#include <vespa/vespalib/gtest/gtest.h>
using namespace vespalib;
TEST(ReplaceVariableTest, simple_usage)
{
// replace one variable
EXPECT_EQ("vv", replace_variable("x", "x", "vv"));
EXPECT_EQ("f(vv)", replace_variable("f(x)", "x", "vv"));
EXPECT_EQ("f(vv)", replace_variable("f(myvariablename)", "myvariablename", "vv"));
EXPECT_EQ("vv(f)", replace_variable("x(f)", "x", "vv"));
EXPECT_EQ("3*vv", replace_variable("3*x", "x", "vv"));
// replace variable multiple times
EXPECT_EQ("vv(vv,vv*vv)+vv", replace_variable("x(x,x*x)+x", "x", "vv"));
// do not replace variable when substring of a word
EXPECT_EQ("f(xx)", replace_variable("f(xx)", "x", "vv"));
EXPECT_EQ("f(ax)", replace_variable("f(ax)", "x", "vv"));
EXPECT_EQ("f(xa)", replace_variable("f(xa)", "x", "vv"));
EXPECT_EQ("f(axa)", replace_variable("f(axa)", "x", "vv"));
// variable names can contain underscore '_'
EXPECT_EQ("f(vv)", replace_variable("f(x_y)", "x_y", "vv"));
}
GTEST_MAIN_RUN_ALL_TESTS()
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