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-rw-r--r--vespalib/src/tests/stllike/replace_variable_test.cpp30
1 files changed, 30 insertions, 0 deletions
diff --git a/vespalib/src/tests/stllike/replace_variable_test.cpp b/vespalib/src/tests/stllike/replace_variable_test.cpp
new file mode 100644
index 00000000000..46aa768013a
--- /dev/null
+++ b/vespalib/src/tests/stllike/replace_variable_test.cpp
@@ -0,0 +1,30 @@
+// Copyright Verizon Media. 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()