#78, write data type interface

Author: hauner

src/main/kotlin/io/openapiprocessor/core/writer/java/InterfaceDataTypeWriter.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2022 https://github.com/openapi-processor/openapi-processor-core
+ * PDX-License-Identifier: Apache-2.0
+ */
+
+package io.openapiprocessor.core.writer.java
+
+import io.openapiprocessor.core.converter.ApiOptions
+import io.openapiprocessor.core.model.datatypes.InterfaceDataType
+import java.io.Writer
+
+class InterfaceDataTypeWriter(
+    private val apiOptions: ApiOptions,
+    private val headerWriter: SimpleWriter,
+    private val javadocWriter: JavaDocWriter = JavaDocWriter()
+) {
+
+    fun write(target: Writer, dataType: InterfaceDataType) {
+        headerWriter.write(target)
+        target.write("package ${dataType.getPackageName()};\n\n")
+
+        if (apiOptions.javadoc) {
+            target.write(javadocWriter.convert(dataType))
+        }
+
+        target.write("public interface ${dataType.getTypeName()} {\n")
+        target.write ("}\n")
+    }
+}

src/test/kotlin/io/openapiprocessor/core/writer/java/InterfaceDataTypeWriterSpec.kt

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2022 https://github.com/openapi-processor/openapi-processor-core
+ * PDX-License-Identifier: Apache-2.0
+ */
+
+package io.openapiprocessor.core.writer.java
+
+import io.kotest.core.spec.IsolationMode
+import io.kotest.core.spec.style.StringSpec
+import io.kotest.matchers.string.shouldContain
+import io.mockk.verify
+import io.openapiprocessor.core.converter.ApiOptions
+import io.openapiprocessor.core.model.datatypes.DataTypeName
+import io.openapiprocessor.core.model.datatypes.InterfaceDataType
+import java.io.StringWriter
+
+
+class InterfaceDataTypeWriterSpec: StringSpec({
+    isolationMode = IsolationMode.InstancePerTest
+
+    val headerWriter: SimpleWriter = io.mockk.mockk(relaxed = true)
+    val options = ApiOptions()
+    options.oneOfInterface = true
+
+    val writer = InterfaceDataTypeWriter(options, headerWriter)
+    val target = StringWriter()
+
+    "writes 'generated' comment" {
+        val dataType = InterfaceDataType (DataTypeName("Foo"), "pkg")
+
+        writer.write(target, dataType)
+
+        verify (exactly = 1) {
+            headerWriter.write(any())
+        }
+    }
+
+    "writes 'package'" {
+        val pkg = "io.openapiprocessor.test"
+        val dataType = InterfaceDataType (DataTypeName("Foo"), pkg)
+
+        writer.write (target, dataType)
+
+        target.toString() shouldContain
+            """
+            |package $pkg;
+            |
+            """.trimMargin()
+    }
+
+    "writes 'interface'" {
+        val pkg = "io.openapiprocessor.test"
+        val dataType = InterfaceDataType (DataTypeName("Foo"), pkg)
+
+        writer.write (target, dataType)
+
+        target.toString() shouldContain
+            """
+            |public interface ${dataType.getTypeName()} {
+            |}
+            |
+            """.trimMargin()
+    }
+})