Add LabelLength tests

src/main/kotlin/info/mking/k2zpl/builder/Extensions.kt

@@ -3,20 +3,11 @@
 package info.mking.k2zpl.builder
 
 import info.mking.k2zpl.command.EndFormat
-import info.mking.k2zpl.command.LabelLength
 import info.mking.k2zpl.command.StartFormat
 import info.mking.k2zpl.command.ZplCommand
 import info.mking.k2zpl.command.options.ZplFont
 import info.mking.k2zpl.command.options.ZplYesNo
 
-/**
- * Sets the length of the label.
- * @param length The length of the label.
- */
-fun ZplBuilder.labelLength(length: Int) {
-    command(LabelLength(length))
-}
-
 /**
  * Starts the label format.
  */

src/main/kotlin/info/mking/k2zpl/command/LabelLength.kt

@@ -1,10 +1,21 @@
 package info.mking.k2zpl.command
 
+import info.mking.k2zpl.builder.ZplBuilder
+import info.mking.k2zpl.builder.command
+
 internal data class LabelLength(val length: Int) : ZplCommand {
     init {
         require(length in 1..32000) { "Length must be between 1 and 32000" }
     }
 
     override val command: CharSequence = "^LL"
     override val parameters: LinkedHashMap<CharSequence, Any?> = linkedMapOf("l" to length)
+}
+
+/**
+ * Sets the length of the label.
+ * @param length The length of the label.
+ */
+fun ZplBuilder.labelLength(length: Int) {
+    command(LabelLength(length))
 }

src/test/kotlin/info/mking/k2zpl/command/LabelLengthTest.kt

@@ -0,0 +1,43 @@
+package info.mking.k2zpl.command
+
+import info.mking.k2zpl.k2zpl
+import info.mking.k2zpl.testBuildString
+import io.kotest.assertions.throwables.shouldThrow
+import io.kotest.core.spec.IsolationMode
+import io.kotest.core.spec.style.DescribeSpec
+import io.kotest.data.forAll
+import io.kotest.data.headers
+import io.kotest.data.row
+import io.kotest.data.table
+import io.kotest.matchers.shouldBe
+
+class LabelLengthTest : DescribeSpec({
+    isolationMode = IsolationMode.InstancePerLeaf
+
+    val labelLength = LabelLength(100)
+
+    describe("LabelLength") {
+        it("outputs correct command") {
+            labelLength.testBuildString() shouldBe "^LL100"
+        }
+        it("requires valid parameters") {
+            table(
+                headers("length"),
+                row(0),
+                row(32001)
+            ).forAll {
+                shouldThrow<IllegalArgumentException> {
+                    labelLength.copy(length = it)
+                }
+            }
+        }
+    }
+    describe("labelLength extension function") {
+        it("outputs correct command") {
+            val result = k2zpl {
+                labelLength(1000)
+            }
+            result shouldBe "^LL1000\n"
+        }
+    }
+})