diff --git a/nullable_whensomething_test.go b/nullable_whensomething_test.go
new file mode 100644
index 0000000..c274531
--- /dev/null
+++ b/nullable_whensomething_test.go
@@ -0,0 +1,446 @@
+package nul_test
+
+import (
+	"sourcecode.social/reiver/go-nul"
+
+	"testing"
+)
+
+func TestNullable_WhenSomething_string(t *testing.T) {
+
+
+	tests := []struct{
+		Nullable interface{WhenSomething(func(string))}
+		Expected                              string
+	}{
+		{
+			Nullable: nul.Something[string](""),
+			Expected:                       "",
+		},
+		{
+			Nullable: nul.Something[string]("once twice thrice fource"),
+			Expected:                       "once twice thrice fource",
+		},
+		{
+			Nullable: nul.Something[string]("apple banana cherry"),
+			Expected:                       "apple banana cherry",
+		},
+		{
+			Nullable: nul.Something[string]("😈"),
+			Expected:                       "😈",
+		},
+		{
+			Nullable: nul.Something[string]("۰۱۲۳۴۵۶۷۸۹"),
+			Expected:                       "۰۱۲۳۴۵۶۷۸۹",
+		},
+	}
+
+	for testNumber, test := range tests {
+
+		var worked bool = false
+		var value string = "-<([-RaNdOmNeSs])>-"
+
+		test.Nullable.WhenSomething(func(v string){
+
+			worked = true
+			value  = v
+		})
+
+		if !worked {
+			t.Errorf("For test #%d, the call to the method did not seem work.", testNumber)
+			t.Logf("WORKED: %t", worked)
+			t.Logf("NULLABLE: (%T) %#v", test.Nullable, test.Nullable)
+	/////////////// CONTINUE
+			continue
+		}
+
+		{
+			expected := test.Expected
+			actual   := value
+
+			if expected != actual {
+			t.Errorf("For test #%d, the actual value is not what was expected", testNumber)
+			t.Logf("EXPECTED: %q", expected)
+			t.Logf("EXPECTED: %q", actual)
+			t.Logf("WORKED: %t", worked)
+	/////////////////////// CONTINUE
+				continue
+			}
+		}
+	}
+}
+
+func TestNullable_WhenSomething_stringNothing(t *testing.T) {
+
+	var worked bool = false
+
+	nul.Nothing[string]().WhenSomething(func(v string){
+
+		worked = true
+	})
+
+	if worked {
+		t.Errorf("The call to the method worked, but it should not have.")
+		t.Logf("WORKED: %t", worked)
+//////////////// RETURN
+		return
+	}
+}
+
+func TestNullable_WhenSomething_int8(t *testing.T) {
+
+
+	tests := []struct{
+		Nullable interface{WhenSomething(func(int8))}
+		Expected                              int8
+	}{
+		{
+			Nullable: nul.Something[int8](-127),
+			Expected:                     -127,
+		},
+		{
+			Nullable: nul.Something[int8](-126),
+			Expected:                     -126,
+		},
+		{
+			Nullable: nul.Something[int8](-125),
+			Expected:                     -125,
+		},
+		{
+			Nullable: nul.Something[int8](-124),
+			Expected:                     -124,
+		},
+		{
+			Nullable: nul.Something[int8](-123),
+			Expected:                     -123,
+		},
+		{
+			Nullable: nul.Something[int8](-122),
+			Expected:                     -122,
+		},
+		{
+			Nullable: nul.Something[int8](-121),
+			Expected:                     -121,
+		},
+		{
+			Nullable: nul.Something[int8](-120),
+			Expected:                     -120,
+		},
+		{
+			Nullable: nul.Something[int8](-9),
+			Expected:                     -9,
+		},
+		{
+			Nullable: nul.Something[int8](-8),
+			Expected:                     -8,
+		},
+		{
+			Nullable: nul.Something[int8](-7),
+			Expected:                     -7,
+		},
+		{
+			Nullable: nul.Something[int8](-6),
+			Expected:                     -6,
+		},
+		{
+			Nullable: nul.Something[int8](-5),
+			Expected:                     -5,
+		},
+		{
+			Nullable: nul.Something[int8](-4),
+			Expected:                     -4,
+		},
+		{
+			Nullable: nul.Something[int8](-3),
+			Expected:                     -3,
+		},
+		{
+			Nullable: nul.Something[int8](-2),
+			Expected:                     -2,
+		},
+		{
+			Nullable: nul.Something[int8](-1),
+			Expected:                     -1,
+		},
+		{
+			Nullable: nul.Something[int8](0),
+			Expected:                     0,
+		},
+		{
+			Nullable: nul.Something[int8](1),
+			Expected:                     1,
+		},
+		{
+			Nullable: nul.Something[int8](2),
+			Expected:                     2,
+		},
+		{
+			Nullable: nul.Something[int8](3),
+			Expected:                     3,
+		},
+		{
+			Nullable: nul.Something[int8](4),
+			Expected:                     4,
+		},
+		{
+			Nullable: nul.Something[int8](5),
+			Expected:                     5,
+		},
+		{
+			Nullable: nul.Something[int8](6),
+			Expected:                     6,
+		},
+		{
+			Nullable: nul.Something[int8](7),
+			Expected:                     7,
+		},
+		{
+			Nullable: nul.Something[int8](8),
+			Expected:                     8,
+		},
+		{
+			Nullable: nul.Something[int8](9),
+			Expected:                     9,
+		},
+		{
+			Nullable: nul.Something[int8](120),
+			Expected:                     120,
+		},
+		{
+			Nullable: nul.Something[int8](121),
+			Expected:                     121,
+		},
+		{
+			Nullable: nul.Something[int8](122),
+			Expected:                     122,
+		},
+		{
+			Nullable: nul.Something[int8](123),
+			Expected:                     123,
+		},
+		{
+			Nullable: nul.Something[int8](124),
+			Expected:                     124,
+		},
+		{
+			Nullable: nul.Something[int8](125),
+			Expected:                     125,
+		},
+		{
+			Nullable: nul.Something[int8](126),
+			Expected:                     126,
+		},
+		{
+			Nullable: nul.Something[int8](127),
+			Expected:                     127,
+		},
+	}
+
+	for testNumber, test := range tests {
+
+		var worked bool = false
+		var value int8 = -101
+
+		test.Nullable.WhenSomething(func(v int8){
+
+			worked = true
+			value = v
+		})
+
+		if !worked {
+			t.Errorf("For test #%d, the call to the method did not seem work.", testNumber)
+			t.Logf("WORKED: %t", worked)
+			t.Logf("NULLABLE: (%T) %#v", test.Nullable, test.Nullable)
+	//////////////// CONTINUE
+			continue
+		}
+
+		{
+			expected := test.Expected
+			actual   := value
+
+			if expected != actual {
+			t.Errorf("For test #%d, the actual value is not what was expected", testNumber)
+			t.Logf("EXPECTED: %d", expected)
+			t.Logf("EXPECTED: %d", actual)
+			t.Logf("WORKED: %t", worked)
+	/////////////////////// CONTINUE
+				continue
+			}
+		}
+	}
+}
+
+func TestNullable_WhenSomething_int8Nothing(t *testing.T) {
+
+	var worked bool = false
+
+	nul.Nothing[int8]().WhenSomething(func(v int8){
+
+		worked = true
+	})
+
+	if worked {
+		t.Errorf("The call to the method worked, but it should not have.")
+		t.Logf("WORKED: %t", worked)
+//////////////// RETURN
+		return
+	}
+}
+
+func TestNullable_WhenSomething_uint8(t *testing.T) {
+
+
+	tests := []struct{
+		Nullable interface{WhenSomething(func(uint8))}
+		Expected                              uint8
+	}{
+		{
+			Nullable: nul.Something[uint8](0),
+			Expected:                      0,
+		},
+		{
+			Nullable: nul.Something[uint8](1),
+			Expected:                      1,
+		},
+		{
+			Nullable: nul.Something[uint8](2),
+			Expected:                      2,
+		},
+		{
+			Nullable: nul.Something[uint8](3),
+			Expected:                      3,
+		},
+		{
+			Nullable: nul.Something[uint8](4),
+			Expected:                      4,
+		},
+		{
+			Nullable: nul.Something[uint8](5),
+			Expected:                      5,
+		},
+		{
+			Nullable: nul.Something[uint8](6),
+			Expected:                      6,
+		},
+		{
+			Nullable: nul.Something[uint8](7),
+			Expected:                      7,
+		},
+		{
+			Nullable: nul.Something[uint8](8),
+			Expected:                      8,
+		},
+		{
+			Nullable: nul.Something[uint8](9),
+			Expected:                      9,
+		},
+		{
+			Nullable: nul.Something[uint8](120),
+			Expected:                      120,
+		},
+		{
+			Nullable: nul.Something[uint8](121),
+			Expected:                      121,
+		},
+		{
+			Nullable: nul.Something[uint8](122),
+			Expected:                      122,
+		},
+		{
+			Nullable: nul.Something[uint8](123),
+			Expected:                      123,
+		},
+		{
+			Nullable: nul.Something[uint8](124),
+			Expected:                      124,
+		},
+		{
+			Nullable: nul.Something[uint8](125),
+			Expected:                      125,
+		},
+		{
+			Nullable: nul.Something[uint8](126),
+			Expected:                      126,
+		},
+		{
+			Nullable: nul.Something[uint8](127),
+			Expected:                      127,
+		},
+		{
+			Nullable: nul.Something[uint8](250),
+			Expected:                      250,
+		},
+		{
+			Nullable: nul.Something[uint8](251),
+			Expected:                      251,
+		},
+		{
+			Nullable: nul.Something[uint8](252),
+			Expected:                      252,
+		},
+		{
+			Nullable: nul.Something[uint8](253),
+			Expected:                      253,
+		},
+		{
+			Nullable: nul.Something[uint8](254),
+			Expected:                      254,
+		},
+		{
+			Nullable: nul.Something[uint8](255),
+			Expected:                      255,
+		},
+	}
+
+	for testNumber, test := range tests {
+
+		var worked bool = false
+		var value uint8 = 101
+
+		test.Nullable.WhenSomething(func(v uint8){
+
+			worked = true
+			value = v
+		})
+
+		if !worked {
+			t.Errorf("For test #%d, the call to the method did not seem work.", testNumber)
+			t.Logf("WORKED: %t", worked)
+			t.Logf("NULLABLE: (%T) %#v", test.Nullable, test.Nullable)
+	//////////////// CONTINUE
+			continue
+		}
+
+		{
+			expected := test.Expected
+			actual   := value
+
+			if expected != actual {
+			t.Errorf("For test #%d, the actual value is not what was expected", testNumber)
+			t.Logf("EXPECTED: %d", expected)
+			t.Logf("EXPECTED: %d", actual)
+			t.Logf("WORKED: %t", worked)
+	/////////////////////// CONTINUE
+				continue
+			}
+		}
+	}
+}
+
+func TestNullable_WhenSomething_uint8Nothing(t *testing.T) {
+
+	var worked bool = false
+
+	nul.Nothing[uint8]().WhenSomething(func(v uint8){
+
+		worked = true
+	})
+
+	if worked {
+		t.Errorf("The call to the method worked, but it should not have.")
+		t.Logf("WORKED: %t", worked)
+//////////////// RETURN
+		return
+	}
+}