Fix Integration Tests (hyperledger-web3j#1294)

* Initial Commit.

* Initial IT Commit

* CoreIT test fixes

* 80% of Scenarios pass.

* Fixed more tests.

* All tests are passing
Clean up

* Applied feedback

* Wrappers are now generated with every build of codegen

* Removed primitive contract. There is not use for it

* Fixed failing test.
Wrappers will be generated only if the sol file is provided.

codegen/build.gradle

@@ -5,8 +5,28 @@ dependencies {
             "com.squareup:kotlinpoet:$kotlinPoetVersion",
             "com.squareup:javapoet:$javaPoetVersion",
             "info.picocli:picocli:$picocliVersion"
-    testCompile project(path: ':core', configuration: 'testArtifacts')
+    testCompile project(':core').sourceSets.test.output
     implementation("org.junit.platform:junit-platform-launcher:$junitPlatformLauncherVersion")
     implementation("org.junit.jupiter:junit-jupiter-engine:$junitVersion")
     implementation("org.junit.vintage:junit-vintage-engine:$junitVersion")
 }
+
+
+file("src/test/resources/solidity").listFiles().each { File file ->
+    def contractFile = file.listFiles().find({
+        it.getName().endsWith(".sol")
+    })
+    if (contractFile != null) {
+        def contractName = contractFile.name.substring(0, contractFile.name.length() - 4)
+        def generateTask = tasks.register("generate${contractName}Wrapper", JavaExec) {
+            classpath = sourceSets.test.runtimeClasspath
+            main = 'org.web3j.codegen.SolidityFunctionWrapperGenerator'
+            args 'generate',
+                    '--abiFile', "${contractFile.parent}/build/${contractName}.abi",
+                    '--binFile', "${contractFile.parent}/build/${contractName}.bin",
+                    '--outputDir', "build/resources/test/java",
+                    '--package', 'org.com.test.contract'
+        }
+        test.dependsOn generateTask
+    }
+}

codegen/src/main/java/org/web3j/codegen/unit/gen/CompilerClassLoader.java

@@ -28,7 +28,7 @@
 import javax.tools.ToolProvider;
 
 /** Class loader with compilation capabilities. */
-class CompilerClassLoader extends ClassLoader {
+public class CompilerClassLoader extends ClassLoader {
 
     private final File outputDir;
     private final URL[] urls;
@@ -39,7 +39,7 @@ class CompilerClassLoader extends ClassLoader {
      * @param outputDir Directory where classes will be compiled.
      * @param urls Classpath URLs to compile the Java sources.
      */
-    CompilerClassLoader(final File outputDir, final URL... urls) {
+    public CompilerClassLoader(final File outputDir, final URL... urls) {
         super(CompilerClassLoader.class.getClassLoader());
         this.outputDir = outputDir;
         this.urls = urls;

codegen/src/test/java/org/web3j/codegen/SolidityFunctionWrapperGeneratorTest.java

@@ -20,11 +20,7 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
-import javax.tools.DiagnosticCollector;
-import javax.tools.JavaCompiler;
-import javax.tools.JavaFileObject;
-import javax.tools.StandardJavaFileManager;
-import javax.tools.ToolProvider;
+import javax.tools.*;
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -71,8 +67,8 @@ public void testGreeterGeneration() throws Exception {
 
     @Test
     public void testHumanStandardTokenGeneration() throws Exception {
-        testCodeGenerationJvmTypes("contracts", "HumanStandardToken");
-        testCodeGenerationSolidityTypes("contracts", "HumanStandardToken");
+        testCodeGenerationJvmTypes("humanstandardtoken", "HumanStandardToken");
+        testCodeGenerationSolidityTypes("humanstandardtoken", "HumanStandardToken");
     }
 
     @Test
@@ -107,14 +103,14 @@ public void testMisc() throws Exception {
 
     @Test
     public void testContractsNoBin() throws Exception {
-        testCodeGeneration("contracts", "HumanStandardToken", JAVA_TYPES_ARG, false);
-        testCodeGeneration("contracts", "HumanStandardToken", SOLIDITY_TYPES_ARG, false);
+        testCodeGeneration("humanstandardtoken", "HumanStandardToken", JAVA_TYPES_ARG, false);
+        testCodeGeneration("humanstandardtoken", "HumanStandardToken", SOLIDITY_TYPES_ARG, false);
     }
 
     @Test
     public void testComplexStorage0425() throws Exception {
-        testCodeGenerationJvmTypes("complexstorage0.4.25", "ComplexStorage");
-        testCodeGenerationSolidityTypes("complexstorage0.4.25", "ComplexStorage");
+        testCodeGenerationJvmTypes("complexstoragenew", "ComplexStorageNew");
+        testCodeGenerationSolidityTypes("complexstoragenew", "ComplexStorageNew");
     }
 
     @Test
@@ -141,13 +137,13 @@ public void testDuplicateField() throws Exception {
     public void testGenerationCommandPrefixes() throws Exception {
         testCodeGeneration(
                 Arrays.asList(COMMAND_SOLIDITY, COMMAND_GENERATE),
-                "contracts",
+                "humanstandardtoken",
                 "HumanStandardToken",
                 JAVA_TYPES_ARG,
                 true);
         testCodeGeneration(
                 Arrays.asList(COMMAND_GENERATE),
-                "contracts",
+                "humanstandardtoken",
                 "HumanStandardToken",
                 SOLIDITY_TYPES_ARG,
                 true);

codegen/src/test/java/org/web3j/codegen/unit/gen/java/Setup.java

@@ -24,7 +24,7 @@
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.io.TempDir;
 
-import org.web3j.codegen.unit.gen.ClassProvider;
+import org.web3j.codegen.unit.gen.CompilerClassLoader;
 import org.web3j.codegen.unit.gen.MethodFilter;
 
 public class Setup {
@@ -37,6 +37,7 @@ public class Setup {
 
     @BeforeAll
     public static void setUp() throws IOException, ClassNotFoundException {
+
         String urlAsString =
                 Objects.requireNonNull(
                                 Setup.class
@@ -54,13 +55,10 @@ public static void setUp() throws IOException, ClassNotFoundException {
                         "contracts",
                         "GreeterTest.java");
         classAsFile = new File(urlAsString);
-        File greeter = new File(urlAsString.substring(0, urlAsString.indexOf("org/")));
-        greeterContractClass =
-                new ClassProvider(greeter)
-                        .getClasses().stream()
-                                .filter(className -> className.getSimpleName().equals("Greeter"))
-                                .findAny()
-                                .orElse(null);
+        CompilerClassLoader compilerClassLoader =
+                new CompilerClassLoader(temp, Setup.class.getClassLoader().getResource("java/"));
+
+        greeterContractClass = compilerClassLoader.loadClass("org.com.test.contract.Greeter");
 
         filteredMethods = MethodFilter.extractValidMethods(greeterContractClass);
         new JavaClassGenerator(

codegen/src/test/java/org/web3j/codegen/unit/gen/kotlin/Setup.java

@@ -23,7 +23,7 @@
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.io.TempDir;
 
-import org.web3j.codegen.unit.gen.ClassProvider;
+import org.web3j.codegen.unit.gen.CompilerClassLoader;
 import org.web3j.codegen.unit.gen.MethodFilter;
 
 public class Setup {
@@ -53,13 +53,14 @@ public static void setUp() throws Exception {
                         "contracts",
                         "GreeterTest.kt");
         classAsFile = new File(urlAsString);
-        File greeter = new File(urlAsString.substring(0, urlAsString.indexOf("org/")));
-        greeterContractClass =
-                new ClassProvider(greeter)
-                        .getClasses().stream()
-                                .filter(className -> className.getSimpleName().equals("Greeter"))
-                                .findAny()
-                                .orElse(null);
+        CompilerClassLoader compilerClassLoader =
+                new CompilerClassLoader(
+                        temp,
+                        org.web3j.codegen.unit.gen.java.Setup.class
+                                .getClassLoader()
+                                .getResource("java/"));
+
+        greeterContractClass = compilerClassLoader.loadClass("org.com.test.contract.Greeter");
 
         filteredMethods = MethodFilter.extractValidMethods(greeterContractClass);
         new KotlinClassGenerator(