Fix the null string validation. (#24)

* Fix the null string validation.
* Update version to 0.4.1.

Maoli.Tests/CepTest.cs

@@ -58,6 +58,22 @@ public void ConstructorThrowsExceptionIfCepIsInvalidAndStrict()
  });
  }
 
+ [Fact]
+ public void ValidateReturnsFalseIfCepIsNull()
+ {
+ var actual = Cep.Validate(null);
+
+ Assert.False(actual);
+ }
+
+ [Fact]
+ public void StrictValidateReturnsFalseIfCepIsNull()
+ {
+ var actual = Cep.Validate(null, CepPunctuation.Strict);
+
+ Assert.False(actual);
+ }
+
  [Fact]
  public void ValidateReturnsTrueIfCepIsEmpty()
  {

Maoli.Tests/CnpjTest.cs

@@ -201,6 +201,22 @@ public void ValidateReturnsFalseIfCnpjContainsInvalidChars()
  Assert.False(actual);
  }
 
+ [Fact]
+ public void ValidateReturnsFalseIfCnpjIsNull()
+ {
+ var actual = Cnpj.Validate(null);
+
+ Assert.False(actual);
+ }
+
+ [Fact]
+ public void StrictValidateReturnsFalseIfCnpjIsNull()
+ {
+ var actual = Cnpj.Validate(null, CnpjPunctuation.Strict);
+
+ Assert.False(actual);
+ }
+
  [Fact]
  public void ValidateReturnsFalseIfCnpjIsEmpty()
  {

Maoli.Tests/CpfTest.cs

@@ -67,6 +67,22 @@ public void LooseParseThrowsArgumentExceptionIfCpfIsNotValid()
  Assert.True(actual);
  }
 
+ [Fact]
+ public void ValidateReturnsFalseIfCpfIsNull()
+ {
+ var actual = Cpf.Validate(null);
+
+ Assert.False(actual);
+ }
+
+ [Fact]
+ public void StrictValidateReturnsFalseIfCpfIsNull()
+ {
+ var actual = Cpf.Validate(null, CpfPunctuation.Strict);
+
+ Assert.False(actual);
+ }
+
  [Fact]
  public void LooseParseThrowsArgumentExceptionIfCpfIsEmpty()
  {

Maoli/Maoli.csproj

@@ -6,7 +6,7 @@
  <Company />
  <Copyright>Copyright (c) 2019 Adriano Ueda</Copyright>
  <Description>Maoli is a C# helper library for common Brazilian business rules (CPF, CNPJ and CEP). For documentation visit https://github.com/aueda/maoli</Description>
- <Version>0.4.0</Version>
+ <Version>0.4.1</Version>
  <PackageLicenseUrl>http://opensource.org/licenses/MIT</PackageLicenseUrl>
  <PackageProjectUrl>https://github.com/aueda/maoli</PackageProjectUrl>
  <IncludeSymbols>true</IncludeSymbols>

Maoli/V2/CnpjHelper.cs

@@ -20,6 +20,11 @@ internal static bool Validate(string value, CnpjPunctuation punctuation)
  {
  var isValid = false;
 
+ if (value == null)
+ {
+ return isValid;
+ }
+
  if (punctuation == CnpjPunctuation.Strict)
  {
  isValid =

Maoli/V2/CpfHelper.cs

@@ -130,6 +130,11 @@ internal static bool Validate(string value, CpfPunctuation punctuation)
  {
  var isValid = false;
 
+ if (value == null)
+ {
+ return isValid;
+ }
+
  if (punctuation == CpfPunctuation.Strict)
  {
  isValid =