diff --git a/tests/ReC.Tests/Application/Behaviors/InvokeActionTests.cs b/tests/ReC.Tests/Application/Behaviors/InvokeActionTests.cs
new file mode 100644
index 0000000..73d00ea
--- /dev/null
+++ b/tests/ReC.Tests/Application/Behaviors/InvokeActionTests.cs
@@ -0,0 +1,257 @@
+using System.ComponentModel.DataAnnotations.Schema;
+using ReC.Application.Common.Behaviors.InvokeAction;
+using ReC.Application.Common.Exceptions;
+
+namespace ReC.Tests.Application.Behaviors;
+
+#region Test Models
+
+public class Foo
+{
+    [Column("BAZ")]
+    public int Baz { get; set; }
+
+    [Column("FOO_NAME")]
+    public string FooName { get; set; } = string.Empty;
+}
+
+public class Bar
+{
+    [Column("QUX")]
+    public bool Qux { get; set; }
+
+    [Column("BAR_DATE")]
+    public DateTime BarDate { get; set; }
+}
+
+public class Fuz
+{
+    [Column("QUZ")]
+    public string Quz { get; set; } = string.Empty;
+
+    [Column("FUZ_OFFSET")]
+    public DateTimeOffset FuzOffset { get; set; }
+}
+
+public class NoColumnModel
+{
+    public int Id { get; set; }
+    public string Name { get; set; } = string.Empty;
+}
+
+#endregion
+
+[TestFixture]
+public class InvokeActionTests
+{
+    private Foo _foo = null!;
+    private Bar _bar = null!;
+    private Fuz _fuz = null!;
+
+    [SetUp]
+    public void Setup()
+    {
+        _foo = new Foo { Baz = 2, FooName = "TestFoo" };
+        _bar = new Bar { Qux = true, BarDate = new DateTime(2025, 6, 15, 14, 30, 0) };
+        _fuz = new Fuz { Quz = "QuZ", FuzOffset = new DateTimeOffset(2025, 6, 15, 14, 30, 0, TimeSpan.FromHours(3)) };
+    }
+
+    #region GetValueByColumnName Tests
+
+    [Test]
+    public void GetValueByColumnName_ExistingColumn_ReturnsValue()
+    {
+        var result = _foo.GetValueByColumnName("BAZ");
+        Assert.That(result, Is.EqualTo(2));
+    }
+
+    [Test]
+    public void GetValueByColumnName_NonExistingColumn_ReturnsNull()
+    {
+        var result = _foo.GetValueByColumnName("NON_EXISTING");
+        Assert.That(result, Is.Null);
+    }
+
+    [Test]
+    public void GetValueByColumnName_PropertyNameInsteadOfColumnName_ReturnsNull()
+    {
+        var result = _foo.GetValueByColumnName("Baz");
+        Assert.That(result, Is.Null);
+    }
+
+    [Test]
+    public void GetValueByColumnName_ModelWithoutColumnAttribute_ReturnsNull()
+    {
+        var model = new NoColumnModel { Id = 1, Name = "Test" };
+        var result = model.GetValueByColumnName("Id");
+        Assert.That(result, Is.Null);
+    }
+
+    #endregion
+
+    #region ReplacePlaceholders - Basic Type Tests
+
+    [TestCase("SELECT * FROM T WHERE BAZ = {#INT#BAZ}", "SELECT * FROM T WHERE BAZ = 2")]
+    [TestCase("... WHERE BAZ = {#INT#BAZ}", "... WHERE BAZ = 2")]
+    public void ReplacePlaceholders_IntValue_ReplacesCorrectly(string input, string expected)
+    {
+        var result = input.ReplacePlaceholders(_foo, _bar, _fuz);
+        Assert.That(result, Is.EqualTo(expected));
+    }
+
+    [TestCase("SELECT * FROM T WHERE QUX = {#BOOL#QUX}", "SELECT * FROM T WHERE QUX = TRUE")]
+    [TestCase("... WHERE QUX = {#INT#QUX}", "... WHERE QUX = TRUE")]
+    public void ReplacePlaceholders_BoolTrueValue_ReplacesWithTRUE(string input, string expected)
+    {
+        var result = input.ReplacePlaceholders(_foo, _bar, _fuz);
+        Assert.That(result, Is.EqualTo(expected));
+    }
+
+    [Test]
+    public void ReplacePlaceholders_BoolFalseValue_ReplacesWithFALSE()
+    {
+        var bar = new Bar { Qux = false };
+        var result = "WHERE QUX = {#BOOL#QUX}".ReplacePlaceholders(bar);
+        Assert.That(result, Is.EqualTo("WHERE QUX = FALSE"));
+    }
+
+    [TestCase("... WHERE QUZ <> '{#STR#QUZ}'", "... WHERE QUZ <> 'QuZ'")]
+    [TestCase("SELECT * FROM T WHERE QUZ = '{#TEXT#QUZ}'", "SELECT * FROM T WHERE QUZ = 'QuZ'")]
+    public void ReplacePlaceholders_StringValue_ReplacesCorrectly(string input, string expected)
+    {
+        var result = input.ReplacePlaceholders(_foo, _bar, _fuz);
+        Assert.That(result, Is.EqualTo(expected));
+    }
+
+    [Test]
+    public void ReplacePlaceholders_DateTimeValue_FormatsAsSqlDateTime()
+    {
+        var result = "WHERE D = '{#DATE#BAR_DATE}'".ReplacePlaceholders(_bar);
+        Assert.That(result, Is.EqualTo("WHERE D = '2025-06-15 14:30:00'"));
+    }
+
+    [Test]
+    public void ReplacePlaceholders_DateTimeOffsetValue_FormatsWithOffset()
+    {
+        var result = "WHERE D = '{#DTO#FUZ_OFFSET}'".ReplacePlaceholders(_fuz);
+        Assert.That(result, Is.EqualTo("WHERE D = '2025-06-15 14:30:00 +03:00'"));
+    }
+
+    #endregion
+
+    #region ReplacePlaceholders - Multiple Placeholders
+
+    [Test]
+    public void ReplacePlaceholders_MultiplePlaceholdersInSameString_ReplacesAll()
+    {
+        var input = "WHERE BAZ = {#INT#BAZ} AND QUX = {#BOOL#QUX} AND QUZ = '{#STR#QUZ}'";
+        var expected = "WHERE BAZ = 2 AND QUX = TRUE AND QUZ = 'QuZ'";
+
+        var result = input.ReplacePlaceholders(_foo, _bar, _fuz);
+        Assert.That(result, Is.EqualTo(expected));
+    }
+
+    [Test]
+    public void ReplacePlaceholders_SamePlaceholderTwice_ReplacesBoth()
+    {
+        var input = "WHERE BAZ = {#INT#BAZ} OR BAZ = {#INT#BAZ}";
+        var expected = "WHERE BAZ = 2 OR BAZ = 2";
+
+        var result = input.ReplacePlaceholders(_foo);
+        Assert.That(result, Is.EqualTo(expected));
+    }
+
+    #endregion
+
+    #region ReplacePlaceholders - Object Resolution Order
+
+    [Test]
+    public void ReplacePlaceholders_ValueFoundInSecondObject_ReturnsValueFromSecondObject()
+    {
+        var result = "WHERE QUX = {#BOOL#QUX}".ReplacePlaceholders(_foo, _bar);
+        Assert.That(result, Is.EqualTo("WHERE QUX = TRUE"));
+    }
+
+    [Test]
+    public void ReplacePlaceholders_ValueFoundInThirdObject_ReturnsValueFromThirdObject()
+    {
+        var result = "WHERE QUZ = '{#STR#QUZ}'".ReplacePlaceholders(_foo, _bar, _fuz);
+        Assert.That(result, Is.EqualTo("WHERE QUZ = 'QuZ'"));
+    }
+
+    #endregion
+
+    #region ReplacePlaceholders - No Placeholder
+
+    [TestCase("SELECT * FROM T WHERE X = 1")]
+    [TestCase("")]
+    [TestCase("some random text")]
+    public void ReplacePlaceholders_NoPlaceholders_ReturnsOriginalString(string input)
+    {
+        var result = input.ReplacePlaceholders(_foo, _bar, _fuz);
+        Assert.That(result, Is.EqualTo(input));
+    }
+
+    #endregion
+
+    #region ReplacePlaceholders - Different Prefix Strings
+
+    [TestCase("WHERE BAZ = {#VAR#BAZ}", "WHERE BAZ = 2")]
+    [TestCase("WHERE BAZ = {#PARAM#BAZ}", "WHERE BAZ = 2")]
+    [TestCase("WHERE BAZ = {#X#BAZ}", "WHERE BAZ = 2")]
+    [TestCase("WHERE BAZ = {#SOME_LONG_PREFIX#BAZ}", "WHERE BAZ = 2")]
+    public void ReplacePlaceholders_DifferentPrefixes_AllResolveCorrectly(string input, string expected)
+    {
+        var result = input.ReplacePlaceholders(_foo);
+        Assert.That(result, Is.EqualTo(expected));
+    }
+
+    #endregion
+
+    #region ReplacePlaceholders - Exception Tests
+
+    [Test]
+    public void ReplacePlaceholders_UnresolvableColumn_ThrowsPlaceholderResolutionException()
+    {
+        var input = "WHERE X = {#INT#NON_EXISTING}";
+
+        var ex = Assert.Throws<PlaceholderResolutionException>(() =>
+            input.ReplacePlaceholders(_foo, _bar, _fuz));
+
+        Assert.That(ex!.ColumnName, Is.EqualTo("NON_EXISTING"));
+        Assert.That(ex.Placeholder, Is.EqualTo("{#INT#NON_EXISTING}"));
+        Assert.That(ex.Input, Is.EqualTo(input));
+    }
+
+    [Test]
+    public void ReplacePlaceholders_NoObjectsProvided_ThrowsPlaceholderResolutionException()
+    {
+        var input = "WHERE X = {#INT#BAZ}";
+
+        Assert.Throws<PlaceholderResolutionException>(() =>
+            input.ReplacePlaceholders());
+    }
+
+    [Test]
+    public void ReplacePlaceholders_ObjectWithoutColumnAttributes_ThrowsPlaceholderResolutionException()
+    {
+        var model = new NoColumnModel { Id = 1, Name = "Test" };
+        var input = "WHERE X = {#INT#Id}";
+
+        Assert.Throws<PlaceholderResolutionException>(() =>
+            input.ReplacePlaceholders(model));
+    }
+
+    [Test]
+    public void ReplacePlaceholders_MixedResolvableAndUnresolvable_ThrowsOnUnresolvable()
+    {
+        var input = "WHERE BAZ = {#INT#BAZ} AND X = {#INT#UNKNOWN}";
+
+        var ex = Assert.Throws<PlaceholderResolutionException>(() =>
+            input.ReplacePlaceholders(_foo, _bar, _fuz));
+
+        Assert.That(ex!.ColumnName, Is.EqualTo("UNKNOWN"));
+    }
+
+    #endregion
+}