Add StartFormat tests

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

@@ -3,18 +3,10 @@
 package info.mking.k2zpl.builder
 
 import info.mking.k2zpl.command.EndFormat
-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
 
-/**
- * Starts the label format.
- */
-fun ZplBuilder.startFormat() {
-    command(StartFormat)
-}
-
 /**
  * Ends the label format.
  */

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

@@ -1,5 +1,15 @@
 package info.mking.k2zpl.command
 
+import info.mking.k2zpl.builder.ZplBuilder
+import info.mking.k2zpl.builder.command
+
 internal data object StartFormat : ZplCommand {
     override val command: CharSequence = "^XA"
+}
+
+/**
+ * Starts the label format.
+ */
+fun ZplBuilder.startFormat() {
+    command(StartFormat)
 }

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

@@ -0,0 +1,25 @@
+package info.mking.k2zpl.command
+
+import info.mking.k2zpl.k2zpl
+import info.mking.k2zpl.testBuildString
+import io.kotest.core.spec.IsolationMode
+import io.kotest.core.spec.style.DescribeSpec
+import io.kotest.matchers.shouldBe
+
+class StartFormatTest : DescribeSpec({
+    isolationMode = IsolationMode.InstancePerLeaf
+
+    describe("StartFormat") {
+        it("outputs correct command") {
+            StartFormat.testBuildString() shouldBe "^XA"
+        }
+    }
+    describe("startFormat extension function") {
+        it("outputs correct command") {
+            val result = k2zpl {
+                startFormat()
+            }
+            result shouldBe "^XA\n"
+        }
+    }
+})