fix: inset shadow tailwind-merge v2.2.2 (#9)

* chore: installed testing lib

* test: test cases for bug

* fix: fixed regex

Author: Oudwins

go.mod

@@ -1,3 +1,11 @@
 module github.com/Oudwins/tailwind-merge-go
 
 go 1.21.5
+
+require github.com/stretchr/testify v1.9.0
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+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/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+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 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/twmerge/validators.go

@@ -76,7 +76,7 @@ func IsTshirtSize(val string) bool {
 }
 
 func IsShadow(val string) bool {
-	pattern := regexp.MustCompile(`^-?((\d+)?\.?(\d+)[a-z]+|0)_-?((\d+)?\.?(\d+)[a-z]+|0)`)
+	pattern := regexp.MustCompile(`^(inset_)?-?((\d+)?\.?(\d+)[a-z]+|0)_-?((\d+)?\.?(\d+)[a-z]+|0)`)
 	return pattern.MatchString(val)
 }
 

pkg/twmerge/validators_test.go

@@ -0,0 +1,23 @@
+package twmerge
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestArbitraryShadow(t *testing.T) {
+	assert.Equal(t, IsArbitraryShadow("[inset_0_1px_0,inset_0_-1px_0]"), true)
+	assert.Equal(t, IsArbitraryShadow("[0_35px_60px_-15px_rgba(0,0,0,0.3)]"), true)
+	assert.Equal(t, IsArbitraryShadow("[inset_0_1px_0,inset_0_-1px_0]"), true)
+	assert.Equal(t, IsArbitraryShadow("[0_0_#00f]"), true)
+	assert.Equal(t, IsArbitraryShadow("[.5rem_0_rgba(5,5,5,5)]"), true)
+	assert.Equal(t, IsArbitraryShadow("[-.5rem_0_#123456]"), true)
+	assert.Equal(t, IsArbitraryShadow("[0.5rem_-0_#123456]"), true)
+	assert.Equal(t, IsArbitraryShadow("[0.5rem_-0.005vh_#123456]"), true)
+	assert.Equal(t, IsArbitraryShadow("[0.5rem_-0.005vh]"), true)
+
+	assert.Equal(t, IsArbitraryShadow("[rgba(5,5,5,5)]"), false)
+	assert.Equal(t, IsArbitraryShadow("[#00f]"), false)
+	assert.Equal(t, IsArbitraryShadow("[something-else]"), false)
+}