diff --git a/go.mod b/go.mod
index 9e46b24..6a2966b 100644
--- a/go.mod
+++ b/go.mod
@@ -6,4 +6,5 @@ require (
 	github.com/mattn/go-runewidth v0.0.13
 	github.com/muesli/reflow v0.2.1-0.20210115123740-9e1d0d53df68
 	github.com/muesli/termenv v0.11.1-0.20220204035834-5ac8409525e0
+	github.com/stretchr/testify v1.7.1
 )
diff --git a/go.sum b/go.sum
index ba0a481..9e2e8e6 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +1,5 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
 github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
@@ -9,8 +11,17 @@ github.com/muesli/reflow v0.2.1-0.20210115123740-9e1d0d53df68 h1:y1p/ycavWjGT9Fn
 github.com/muesli/reflow v0.2.1-0.20210115123740-9e1d0d53df68/go.mod h1:Xk+z4oIWdQqJzsxyjgl3P22oYZnHdZ8FFTHAQQt5BMQ=
 github.com/muesli/termenv v0.11.1-0.20220204035834-5ac8409525e0 h1:STjmj0uFfRryL9fzRA/OupNppeAID6QJYPMavTL7jtY=
 github.com/muesli/termenv v0.11.1-0.20220204035834-5ac8409525e0/go.mod h1:Bd5NYQ7pd+SrtBSrSNoBBmXlcY8+Xj4BMJgh8qcZrvs=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.1 h1:5TQK59W5E3v0r2duFAb7P95B6hEeOyEnHRa8MjYSMTY=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK8p3i2/krTr0H1rg74I=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/style_test.go b/style_test.go
index c1ee043..825fa7a 100644
--- a/style_test.go
+++ b/style_test.go
@@ -2,8 +2,249 @@ package lipgloss
 
 import (
 	"testing"
+
+	"github.com/muesli/termenv"
+	"github.com/stretchr/testify/require"
 )
 
+func TestStyleRender(t *testing.T) {
+	t.Parallel()
+
+	tt := []struct {
+		style    Style
+		expected string
+	}{
+		{
+			NewStyle().Foreground(Color("#5A56E0")),
+			"\x1b[38;2;89;86;224mhello\x1b[0m",
+		},
+		{
+			NewStyle().Bold(true),
+			"\x1b[1mhello\x1b[0m",
+		},
+		{
+			NewStyle().Italic(true),
+			"\x1b[3mhello\x1b[0m",
+		},
+		{
+			NewStyle().Underline(true),
+			"\x1b[4;4mh\x1b[0m\x1b[4;4me\x1b[0m\x1b[4;4ml\x1b[0m\x1b[4;4ml\x1b[0m\x1b[4;4mo\x1b[0m",
+		},
+		{
+			NewStyle().Blink(true),
+			"\x1b[5mhello\x1b[0m",
+		},
+		{
+			NewStyle().Faint(true),
+			"\x1b[2mhello\x1b[0m",
+		},
+	}
+
+	SetColorProfile(termenv.TrueColor)
+	for i, tc := range tt {
+		res := tc.style.Render("hello")
+		if res != tc.expected {
+			t.Errorf("Test %d, expected:\n\n`%s`\n`%s`\n\nActual output:\n\n`%s`\n`%s`\n\n",
+				i, tc.expected, formatEscapes(tc.expected),
+				res, formatEscapes(res))
+		}
+	}
+}
+
+func TestValueCopy(t *testing.T) {
+	t.Parallel()
+
+	s := NewStyle().
+		Bold(true)
+
+	i := s
+	i.Bold(false)
+
+	require.Equal(t, s.GetBold(), i.GetBold())
+}
+
+func TestStyleInherit(t *testing.T) {
+	t.Parallel()
+
+	s := NewStyle().
+		Bold(true).
+		Italic(true).
+		Underline(true).
+		Strikethrough(true).
+		Blink(true).
+		Faint(true).
+		Foreground(Color("#ffffff")).
+		Background(Color("#111111")).
+		Margin(1, 1, 1, 1).
+		Padding(1, 1, 1, 1)
+
+	i := NewStyle().Inherit(s)
+
+	require.Equal(t, s.GetBold(), i.GetBold())
+	require.Equal(t, s.GetItalic(), i.GetItalic())
+	require.Equal(t, s.GetUnderline(), i.GetUnderline())
+	require.Equal(t, s.GetStrikethrough(), i.GetStrikethrough())
+	require.Equal(t, s.GetBlink(), i.GetBlink())
+	require.Equal(t, s.GetFaint(), i.GetFaint())
+	require.Equal(t, s.GetForeground(), i.GetForeground())
+	require.Equal(t, s.GetBackground(), i.GetBackground())
+
+	require.NotEqual(t, s.GetMarginLeft(), i.GetMarginLeft())
+	require.NotEqual(t, s.GetMarginRight(), i.GetMarginRight())
+	require.NotEqual(t, s.GetMarginTop(), i.GetMarginTop())
+	require.NotEqual(t, s.GetMarginBottom(), i.GetMarginBottom())
+	require.NotEqual(t, s.GetPaddingLeft(), i.GetPaddingLeft())
+	require.NotEqual(t, s.GetPaddingRight(), i.GetPaddingRight())
+	require.NotEqual(t, s.GetPaddingTop(), i.GetPaddingTop())
+	require.NotEqual(t, s.GetPaddingBottom(), i.GetPaddingBottom())
+}
+
+func TestStyleCopy(t *testing.T) {
+	t.Parallel()
+
+	s := NewStyle().
+		Bold(true).
+		Italic(true).
+		Underline(true).
+		Strikethrough(true).
+		Blink(true).
+		Faint(true).
+		Foreground(Color("#ffffff")).
+		Background(Color("#111111")).
+		Margin(1, 1, 1, 1).
+		Padding(1, 1, 1, 1)
+
+	i := s.Copy()
+
+	require.Equal(t, s.GetBold(), i.GetBold())
+	require.Equal(t, s.GetItalic(), i.GetItalic())
+	require.Equal(t, s.GetUnderline(), i.GetUnderline())
+	require.Equal(t, s.GetStrikethrough(), i.GetStrikethrough())
+	require.Equal(t, s.GetBlink(), i.GetBlink())
+	require.Equal(t, s.GetFaint(), i.GetFaint())
+	require.Equal(t, s.GetForeground(), i.GetForeground())
+	require.Equal(t, s.GetBackground(), i.GetBackground())
+
+	require.Equal(t, s.GetMarginLeft(), i.GetMarginLeft())
+	require.Equal(t, s.GetMarginRight(), i.GetMarginRight())
+	require.Equal(t, s.GetMarginTop(), i.GetMarginTop())
+	require.Equal(t, s.GetMarginBottom(), i.GetMarginBottom())
+	require.Equal(t, s.GetPaddingLeft(), i.GetPaddingLeft())
+	require.Equal(t, s.GetPaddingRight(), i.GetPaddingRight())
+	require.Equal(t, s.GetPaddingTop(), i.GetPaddingTop())
+	require.Equal(t, s.GetPaddingBottom(), i.GetPaddingBottom())
+}
+
+func TestStyleUnset(t *testing.T) {
+	t.Parallel()
+
+	s := NewStyle().Bold(true)
+	require.True(t, s.GetBold())
+	s.UnsetBold()
+	require.False(t, s.GetBold())
+
+	s = NewStyle().Italic(true)
+	require.True(t, s.GetItalic())
+	s.UnsetItalic()
+	require.False(t, s.GetItalic())
+
+	s = NewStyle().Underline(true)
+	require.True(t, s.GetUnderline())
+	s.UnsetUnderline()
+	require.False(t, s.GetUnderline())
+
+	s = NewStyle().Strikethrough(true)
+	require.True(t, s.GetStrikethrough())
+	s.UnsetStrikethrough()
+	require.False(t, s.GetStrikethrough())
+
+	s = NewStyle().Reverse(true)
+	require.True(t, s.GetReverse())
+	s.UnsetReverse()
+	require.False(t, s.GetReverse())
+
+	s = NewStyle().Blink(true)
+	require.True(t, s.GetBlink())
+	s.UnsetBlink()
+	require.False(t, s.GetBlink())
+
+	s = NewStyle().Faint(true)
+	require.True(t, s.GetFaint())
+	s.UnsetFaint()
+	require.False(t, s.GetFaint())
+
+	s = NewStyle().Inline(true)
+	require.True(t, s.GetInline())
+	s.UnsetInline()
+	require.False(t, s.GetInline())
+
+	// colors
+	col := Color("#ffffff")
+	s = NewStyle().Foreground(col)
+	require.Equal(t, col, s.GetForeground())
+	s.UnsetForeground()
+	require.NotEqual(t, col, s.GetForeground())
+
+	s = NewStyle().Background(col)
+	require.Equal(t, col, s.GetBackground())
+	s.UnsetBackground()
+	require.NotEqual(t, col, s.GetBackground())
+
+	// margins
+	s = NewStyle().Margin(1, 2, 3, 4)
+	require.Equal(t, 1, s.GetMarginTop())
+	s.UnsetMarginTop()
+	require.Equal(t, 0, s.GetMarginTop())
+
+	require.Equal(t, 2, s.GetMarginRight())
+	s.UnsetMarginRight()
+	require.Equal(t, 0, s.GetMarginRight())
+
+	require.Equal(t, 3, s.GetMarginBottom())
+	s.UnsetMarginBottom()
+	require.Equal(t, 0, s.GetMarginBottom())
+
+	require.Equal(t, 4, s.GetMarginLeft())
+	s.UnsetMarginLeft()
+	require.Equal(t, 0, s.GetMarginLeft())
+
+	// padding
+	s = NewStyle().Padding(1, 2, 3, 4)
+	require.Equal(t, 1, s.GetPaddingTop())
+	s.UnsetPaddingTop()
+	require.Equal(t, 0, s.GetPaddingTop())
+
+	require.Equal(t, 2, s.GetPaddingRight())
+	s.UnsetPaddingRight()
+	require.Equal(t, 0, s.GetPaddingRight())
+
+	require.Equal(t, 3, s.GetPaddingBottom())
+	s.UnsetPaddingBottom()
+	require.Equal(t, 0, s.GetPaddingBottom())
+
+	require.Equal(t, 4, s.GetPaddingLeft())
+	s.UnsetPaddingLeft()
+	require.Equal(t, 0, s.GetPaddingLeft())
+
+	// border
+	s = NewStyle().Border(normalBorder, true, true, true, true)
+	require.True(t, s.GetBorderTop())
+	s.UnsetBorderTop()
+	require.False(t, s.GetBorderTop())
+
+	require.True(t, s.GetBorderRight())
+	s.UnsetBorderRight()
+	require.False(t, s.GetBorderRight())
+
+	require.True(t, s.GetBorderBottom())
+	s.UnsetBorderBottom()
+	require.False(t, s.GetBorderBottom())
+
+	require.True(t, s.GetBorderLeft())
+	s.UnsetBorderLeft()
+	require.False(t, s.GetBorderLeft())
+}
+
 func BenchmarkStyleRender(b *testing.B) {
 	s := NewStyle().
 		Bold(true).