add missing tests

README.md

@@ -13,7 +13,6 @@
 - 🔄 Built-in JSON marshaling/unmarshaling
 - 📊 SQL database compatibility
 - ✨ Zero dependencies
-- 🚀 High performance
 
 ## Usage
 

gonull_test.go

@@ -793,3 +793,71 @@ func Test_IsZero(t *testing.T) {
 	assert.Equal(t, "foo", foo2.Name.Val) // the value was passed, the value is valid
 	assert.False(t, foo1.ID.IsZero())     // the value is not "zero"
 }
+
+func TestNullableScan_Float64(t *testing.T) {
+	tests := []struct {
+		name            string
+		value, expected any
+		Valid           bool
+		Present         bool
+		wantErr         bool
+	}{
+		{
+			name:     "float64 type",
+			value:    float64(0.25),
+			expected: float64(0.25),
+			Valid:    true,
+			Present:  true,
+		},
+		{
+			name:     "float32 type",
+			value:    float32(0.25),
+			expected: float64(0.25),
+			Valid:    true,
+			Present:  true,
+		},
+		{
+			name:     "[]uint8|[]byte type",
+			value:    []byte("0.25"),
+			expected: float64(0.25),
+			Valid:    true,
+			Present:  true,
+		},
+		{
+			name:    "[]uint8|[]byte type empty",
+			value:   []byte{},
+			wantErr: true,
+			Present: true,
+		},
+		{
+			name:    "[]uint8|[]byte type non numbers",
+			value:   []byte("not a number"),
+			wantErr: true,
+			Present: true,
+		},
+		{
+			name:    "unsupported type",
+			value:   []int64{48, 46, 50, 53},
+			wantErr: true,
+			Present: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var n Nullable[float64]
+			err := n.Scan(tt.value)
+
+			if tt.wantErr {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+				assert.Equal(t, tt.Valid, n.Valid)
+				assert.Equal(t, tt.Present, n.Present)
+				if tt.Valid {
+					assert.Equal(t, tt.expected, n.Val)
+				}
+			}
+		})
+	}
+}