Fix model sanitisation (#19)

* Ignore java head-dumps
* Define initial test infrastructure
* Fix model sanitisation
* Update test naming to follow typical JUnit test naming convention

Author: macisamuele

.gitignore

@@ -1,6 +1,7 @@
 *.iml
 .*
-local.properties
-venv/
 build/
+java_pid*.hprof
+local.properties
 out/
+venv/

plugin/build.gradle.kts

@@ -20,6 +20,8 @@ dependencies {
     implementation("com.google.guava:guava:27.0-jre")
     implementation("io.swagger:swagger-codegen:2.3.1")
     implementation("org.json:json:20180813")
+
+    testImplementation("junit:junit:4.12")
 }
 
 tasks.register<Jar>("sourcesJar") {

plugin/src/main/java/com/yelp/codegen/KotlinGenerator.kt

@@ -319,7 +319,7 @@ class KotlinGenerator : SharedCodegen() {
             name
         } else {
             matchXModel(name)
-                    .split(".").last()
+                    .replace(Regex("(\\.|\\s)"), "_")
                     .toPascalCase()
                     .sanitizeKotlinSpecificNames(specialCharReplacements)
                     .apply { escapeReservedWord(this) }

plugin/src/test/java/com/yelp/codegen/KotlinGeneratorTest.kt

@@ -0,0 +1,14 @@
+package com.yelp.codegen
+
+import org.junit.Test
+
+class KotlinGeneratorTest {
+
+    @Test
+    fun toModelName_doesNotTrimTooMuch() {
+        assert(KotlinGenerator().toModelName("model") == "Model")
+        assert(KotlinGenerator().toModelName("model with space") == "ModelWithSpace")
+        assert(KotlinGenerator().toModelName("model with dot.s") == "ModelWithDotS")
+        assert(KotlinGenerator().toModelName("model with userscore_s") == "ModelWithUserscoreS")
+    }
+}