♻ : convert test to Kotlin

src/test/java/io/gaia_app/stacks/bo/StackTest.kt

@@ -0,0 +1,31 @@
+package io.gaia_app.stacks.bo
+
+import io.gaia_app.modules.bo.TerraformModule
+import io.gaia_app.modules.bo.Variable
+import org.assertj.core.api.Assertions
+import org.junit.jupiter.api.Test
+
+internal class StackTest {
+
+    @Test
+    fun tfvars_shouldGenerateTfvarContents() {
+        // given
+        val variableWithDefault = Variable("variableWithDefault", "string", "a variable with a default value", "myValue")
+        val mandatoryVariable = Variable("mandatoryVariable", "string", "a variable with a default value", null, true, true)
+
+        val module = TerraformModule()
+        module.variables = listOf(variableWithDefault, mandatoryVariable)
+
+        val stack = Stack()
+        stack.module = module
+        stack.variableValues = mapOf("mandatoryVariable" to "myOtherValue")
+
+        // when
+        val tfvars = stack.tfvars()
+
+        // then
+        Assertions.assertThat(tfvars)
+            .contains("variableWithDefault = \"myValue\"\n")
+            .contains("mandatoryVariable = \"myOtherValue\"\n")
+    }
+}