add tests

zio-http/js/src/test/scala/zio/http/PathCodecPlatformSpecificSpec.scala

@@ -0,0 +1,35 @@
+package zio.http.codec
+
+import zio._
+import zio.test.Assertion._
+import zio.test._
+
+object PathCodecPlatformSpecificSpec extends ZIOSpecDefault {
+
+  def spec = suite("PathCodecJSPlatformSpecificSpec")(
+    test("parseInt should correctly parse a valid integer from a CharSequence") {
+      val charSequence = "12345"
+      val result       = new PathCodecPlatformSpecific {}.parseInt(charSequence, 0, charSequence.length, 10)
+      assert(result)(equalTo(12345))
+    },
+    test("parseInt should throw an error for an invalid radix") {
+      val charSequence = "12345"
+      val result       = ZIO.attempt {
+        new PathCodecPlatformSpecific {}.parseInt(charSequence, 0, charSequence.length, Character.MAX_RADIX + 1)
+      }.either
+      assertZIO(result)(isLeft(hasMessage(containsString("radix"))))
+    },
+    test("parseLong should correctly parse a valid long from a CharSequence") {
+      val charSequence = "123456789012345"
+      val result       = new PathCodecPlatformSpecific {}.parseLong(charSequence, 0, charSequence.length, 10)
+      assert(result)(equalTo(123456789012345L))
+    },
+    test("parseLong should throw an error for an invalid input") {
+      val charSequence = "invalid123"
+      val result       = ZIO.attempt {
+        new PathCodecPlatformSpecific {}.parseLong(charSequence, 0, charSequence.length, 10)
+      }.either
+      assertZIO(result)(isLeft(hasMessage(containsString("Error at index"))))
+    },
+  )
+}