Remove C# runtime from main, use for tests only

8 files changed, 129 insertions, 4 deletions

diff --git a/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpMethodRunner.java b/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpMethodRunner.java
index b9249aa..06e7987 100644
--- a/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpMethodRunner.java
+++ b/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpMethodRunner.java
@@ -7,7 +7,6 @@ import org.zwobble.couscous.Backend;
 import org.zwobble.couscous.ast.LiteralNode;
 import org.zwobble.couscous.ast.MethodSignature;
 import org.zwobble.couscous.ast.TypeNode;
-import org.zwobble.couscous.backends.csharp.CsharpBackend;
 import org.zwobble.couscous.backends.csharp.CsharpCodeGenerator;
 import org.zwobble.couscous.backends.csharp.CsharpSerializer;
 import org.zwobble.couscous.tests.MethodRunner;
@@ -39,7 +38,7 @@ public class CsharpMethodRunner implements MethodRunner {
     public PrimitiveValue runMethod(List<TypeNode> classNodes, ScalarType className, String methodName, List<PrimitiveValue> arguments, Type returnType) {
         try {
             Path directoryPath = Files.createTempDirectory(null);
-            Backend compiler = new CsharpBackend(directoryPath.resolve("Program.cs"), NAMESPACE);
+            Backend compiler = new CsharpTestBackend(directoryPath, NAMESPACE);
             try {
                 compiler.compile(classNodes);
                 return runFunction(directoryPath, className, methodName, arguments, returnType);
diff --git a/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpTestBackend.java b/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpTestBackend.java
new file mode 100644
index 0000000..fcf7ab5
--- /dev/null
+++ b/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpTestBackend.java
@@ -0,0 +1,52 @@
+package org.zwobble.couscous.tests.backends.csharp;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.io.Resources;
+import org.zwobble.couscous.Backend;
+import org.zwobble.couscous.ast.TypeNode;
+import org.zwobble.couscous.backends.csharp.CsharpBackend;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.List;
+
+import static com.google.common.collect.Iterables.transform;
+
+public class CsharpTestBackend implements Backend {
+    private static final List<String> RUNTIME_FILES = ImmutableList.of(
+        "java/lang/Integer.cs",
+        "java/lang/Object.cs",
+        "java/util/Arrays.cs",
+        // TODO: implement Iterable/Iterator in Java
+        "java/lang/Iterable.cs",
+        "java/util/Iterator.cs");
+
+    private final Path outputDirectory;
+    private final String namespace;
+
+    public CsharpTestBackend(Path outputDirectory, String namespace) {
+        this.outputDirectory = outputDirectory;
+        this.namespace = namespace;
+    }
+
+    @Override
+    public void compile(List<TypeNode> classes) throws IOException {
+        new CsharpBackend(outputDirectory.resolve("Program.cs"), namespace).compile(classes);
+        Files.write(
+            outputDirectory.resolve("Runtime.cs"),
+            transform(
+                RUNTIME_FILES,
+                runtimeFile -> readRuntimeFile(runtimeFile)));
+    }
+
+    private String readRuntimeFile(String runtimeFile) {
+        try {
+            return Resources.toString(Resources.getResource("org/zwobble/couscous/tests/backends/csharp/runtime/" + runtimeFile), StandardCharsets.UTF_8)
+                .replace("namespace Couscous", "namespace " + namespace);
+        } catch (IOException exception) {
+            throw new RuntimeException(exception);
+        }
+    }
+}
diff --git a/src/test/java/org/zwobble/couscous/tests/backends/csharp/JavaToCsharpTests.java b/src/test/java/org/zwobble/couscous/tests/backends/csharp/JavaToCsharpTests.java
index 356b712..bcc44a8 100644
--- a/src/test/java/org/zwobble/couscous/tests/backends/csharp/JavaToCsharpTests.java
+++ b/src/test/java/org/zwobble/couscous/tests/backends/csharp/JavaToCsharpTests.java
@@ -1,7 +1,6 @@
 package org.zwobble.couscous.tests.backends.csharp;
 
 import org.zwobble.couscous.CouscousCompiler;
-import org.zwobble.couscous.backends.csharp.CsharpBackend;
 import org.zwobble.couscous.frontends.java.JavaFrontend;
 import org.zwobble.couscous.tests.CompilerTests;
 import org.zwobble.couscous.types.ScalarType;
@@ -27,7 +26,7 @@ public class JavaToCsharpTests extends CompilerTests {
         try {
             CouscousCompiler compiler = new CouscousCompiler(
                 new JavaFrontend(),
-                new CsharpBackend(directoryPath.resolve("Program.cs"), CsharpMethodRunner.NAMESPACE));
+                new CsharpTestBackend(directoryPath, CsharpMethodRunner.NAMESPACE));
             compiler.compileDirectory(list(directory), directory);
             return CsharpMethodRunner.runFunction(directoryPath, type, methodName, arguments, returnType);
         } finally {
diff --git a/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/lang/Integer.cs b/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/lang/Integer.cs
new file mode 100644
index 0000000..6ed87db
--- /dev/null
+++ b/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/lang/Integer.cs
@@ -0,0 +1,14 @@
+namespace Couscous.java.lang {
+    internal class Integer : Object {
+        private readonly int _value;
+
+        internal Integer(int value) {
+            _value = value;
+        }
+
+        internal override bool equals(Object other) {
+            var integer = other as Integer;
+            return integer != null && integer._value == _value;
+        }
+    }
+}
diff --git a/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/lang/Iterable.cs b/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/lang/Iterable.cs
new file mode 100644
index 0000000..314dbce
--- /dev/null
+++ b/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/lang/Iterable.cs
@@ -0,0 +1,6 @@
+namespace Couscous.java.lang {
+    // TODO: implement in Java
+    internal interface Iterable<out T> {
+        java.util.Iterator<T> iterator();
+    }
+}
diff --git a/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/lang/Object.cs b/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/lang/Object.cs
new file mode 100644
index 0000000..14a8f44
--- /dev/null
+++ b/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/lang/Object.cs
@@ -0,0 +1,11 @@
+namespace Couscous.java.lang {
+    internal class Object {
+        internal virtual bool equals(Object other) {
+            return System.Object.ReferenceEquals(this, other);
+        }
+
+        public static implicit operator Object(int value) {
+            return new Integer(value);
+        }
+    }
+}
diff --git a/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/util/Arrays.cs b/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/util/Arrays.cs
new file mode 100644
index 0000000..96b31d4
--- /dev/null
+++ b/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/util/Arrays.cs
@@ -0,0 +1,37 @@
+namespace Couscous.java.util {
+    internal static class Arrays {
+        internal static java.lang.Iterable<T> asList<T>(T[] values) {
+            return new _ArrayList<T>(values);
+        }
+    }
+    
+    internal class _ArrayList<T> : java.lang.Iterable<T> {
+        private readonly T[] values;
+        
+        internal _ArrayList(T[] values) {
+            this.values = values;
+        }
+        
+        public java.util.Iterator<T> iterator() {
+            return new _ArrayIterator<T>(values);
+        }
+    }
+    
+    internal class _ArrayIterator<T> : java.util.Iterator<T> {
+        private readonly T[] values;
+        private int nextIndex;
+        
+        internal _ArrayIterator(T[] values) {
+            this.values = values;
+            this.nextIndex = 0;
+        }
+        
+        public bool hasNext() {
+            return nextIndex < values.Length;
+        }
+        
+        public T next() {
+            return values[nextIndex++];
+        }
+    }
+}
diff --git a/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/util/Iterator.cs b/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/util/Iterator.cs
new file mode 100644
index 0000000..9c0098a
--- /dev/null
+++ b/src/test/resources/org/zwobble/couscous/tests/backends/csharp/runtime/java/util/Iterator.cs
@@ -0,0 +1,7 @@
+namespace Couscous.java.util {
+    // TODO: implement in Java
+    internal interface Iterator<out T> {
+        bool hasNext();
+        T next();
+    }
+}