Fix #135 resolveSwaggerTemplate fails if multiple JARs are given

src/main/groovy/org/hidetake/gradle/swagger/generator/ResolveSwaggerTemplate.groovy

@@ -4,17 +4,13 @@ import org.gradle.api.tasks.Sync
 
 /**
  * A task to extract template files from a dependency.
- *
- * @author Hidetake Iwata
  */
 class ResolveSwaggerTemplate extends Sync {
 
-    def ResolveSwaggerTemplate() {
+    ResolveSwaggerTemplate() {
         from {
-            if (!project.configurations.swaggerTemplate.empty) {
-                project.zipTree(project.configurations.swaggerTemplate.singleFile)
-            } else {
-                []
+            project.configurations.swaggerTemplate.resolve().collect {
+                project.zipTree(it)
             }
         }
         into("${project.buildDir}/swagger-template")

src/test/groovy/org/hidetake/gradle/swagger/generator/Fixture.groovy

@@ -3,6 +3,9 @@ package org.hidetake.gradle.swagger.generator
 import org.gradle.api.Project
 import org.gradle.testfixtures.ProjectBuilder
 
+import java.util.zip.ZipEntry
+import java.util.zip.ZipOutputStream
+
 class Fixture {
     static Project projectWithPlugin(@DelegatesTo(Project) Closure closure = {}) {
         def project = ProjectBuilder.builder().build()
@@ -11,6 +14,24 @@ class Fixture {
         project
     }
 
+    /**
+     * Create a JAR file with given contents.
+     *
+     * @param destination JAR file
+     * @param contents map of filename and content
+     */
+    static void createJAR(File destination, Map<String, String> contents) {
+        destination.withOutputStream {
+            new ZipOutputStream(it).withStream { zip ->
+                contents.each { filename, content ->
+                    zip.putNextEntry(new ZipEntry(filename))
+                    zip << content
+                    zip.closeEntry()
+                }
+            }
+        }
+    }
+
     static File file(YAML yaml) {
         new File(Fixture.getResource("/${yaml}.yaml").path)
     }

src/test/groovy/org/hidetake/gradle/swagger/generator/ResolveSwaggerTemplateSpec.groovy

@@ -0,0 +1,42 @@
+package org.hidetake.gradle.swagger.generator
+
+import org.junit.Rule
+import org.junit.rules.TemporaryFolder
+import spock.lang.Specification
+
+class ResolveSwaggerTemplateSpec extends Specification {
+
+    @Rule
+    TemporaryFolder temporaryFolder = new TemporaryFolder()
+
+    def 'task should expand JARs into build/swagger-template'() {
+        given:
+        def repositoryFolder = temporaryFolder.newFolder()
+        Fixture.createJAR(new File(repositoryFolder, 'template-foo-1.0.0.jar'), [
+            'foo.txt': 'foo-hello-world',
+        ])
+        Fixture.createJAR(new File(repositoryFolder, 'template-bar-1.0.0.jar'), [
+            'bar.txt': 'bar-hello-world',
+        ])
+
+        def project = Fixture.projectWithPlugin {
+            repositories {
+                flatDir {
+                    dirs repositoryFolder
+                }
+            }
+            dependencies {
+                swaggerTemplate 'com.example:template-foo:1.0.0'
+                swaggerTemplate 'com.example:template-bar:1.0.0'
+            }
+        }
+
+        when:
+        project.tasks.resolveSwaggerTemplate.copy()
+
+        then:
+        project.file('build/swagger-template/foo.txt').text == 'foo-hello-world'
+        project.file('build/swagger-template/bar.txt').text == 'bar-hello-world'
+    }
+
+}

src/test/groovy/org/hidetake/gradle/swagger/generator/SwaggerGeneratorPluginSpec.groovy

@@ -25,6 +25,7 @@ class SwaggerGeneratorPluginSpec extends Specification {
         project.tasks.generateSwaggerUI
         project.tasks.generateReDoc
         project.tasks.validateSwagger
+        project.tasks.resolveSwaggerTemplate
 
         and: 'should have default properties'
         project.tasks.generateReDoc.scriptSrc =~ /\.js$/