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Allow null values on nodes.

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This commit is contained in:
Valeriano A.R.
2019-12-02 15:59:37 +01:00
parent 213bb424f7
commit c9479cf079
21 changed files with 140 additions and 12 deletions
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40
VAR.ExpressionEvaluator.Tests/ParserTests.cs
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@@ -401,5 +401,45 @@ namespace VAR.ExpressionEvaluator.Tests
#endregion BooleanOps
#region Null value
[TestMethod()]
public void NullValue_NullPlusAnything_EqualsNull()
{
Assert.AreEqual(null, Parser.EvaluateString("null + 1"));
Assert.AreEqual(null, Parser.EvaluateString("null + 100"));
Assert.AreEqual(null, Parser.EvaluateString("1 + null"));
Assert.AreEqual(null, Parser.EvaluateString("100 + null"));
Assert.AreEqual(null, Parser.EvaluateString("null + null"));
}
[TestMethod()]
public void NullValue_NullMinusAnything_EqualsNull()
{
Assert.AreEqual(null, Parser.EvaluateString("null - 1"));
Assert.AreEqual(null, Parser.EvaluateString("null - 100"));
Assert.AreEqual(null, Parser.EvaluateString("1 - null"));
Assert.AreEqual(null, Parser.EvaluateString("100 - null"));
Assert.AreEqual(null, Parser.EvaluateString("null - null"));
}
[TestMethod()]
public void NullValue_NullByAnything_EqualsNull()
{
Assert.AreEqual(null, Parser.EvaluateString("null * 1"));
Assert.AreEqual(null, Parser.EvaluateString("null * 100"));
Assert.AreEqual(null, Parser.EvaluateString("1 * null"));
Assert.AreEqual(null, Parser.EvaluateString("100 * null"));
Assert.AreEqual(null, Parser.EvaluateString("null * null"));
Assert.AreEqual(null, Parser.EvaluateString("null / 1"));
Assert.AreEqual(null, Parser.EvaluateString("null / 100"));
Assert.AreEqual(null, Parser.EvaluateString("1 / null"));
Assert.AreEqual(null, Parser.EvaluateString("100 / null"));
Assert.AreEqual(null, Parser.EvaluateString("null / null"));
}
#endregion
}
}