GH-550 Add simple type.panda test and fix call to another constructor…

… through 'this' keyword

examples/lang/type.panda

@@ -0,0 +1,33 @@
+module lang
+
+main {
+    Foo defaultFoo = new Foo()
+    log 'Static' == Foo.staticField
+    log 'Static' == defaultFoo.staticField
+    log 'Default' == defaultFoo.field
+    log 'Default' == defaultFoo.field()
+
+    Foo foo = new Foo('Custom')
+    log 'Custom' == foo.field
+    log 'Custom' == foo.field()
+}
+
+open type Foo {
+
+    open static String staticField = 'Static'
+
+    internal String field
+
+    constructor (String field) {
+        this.field = field
+    }
+
+    constructor () {
+        this('Default')
+    }
+
+    shared field () -> String {
+        return field
+    }
+
+}

panda/src/main/java/org/panda_lang/panda/language/resource/syntax/type/SelfConstructor.java

@@ -20,6 +20,7 @@
 import org.panda_lang.language.architecture.dynamic.AbstractExecutableStatement;
 import org.panda_lang.language.architecture.expression.Expression;
 import org.panda_lang.language.architecture.expression.ExpressionUtils;
+import org.panda_lang.language.architecture.type.member.constructor.ConstructorScope.ConstructorFrame;
 import org.panda_lang.language.architecture.type.member.constructor.TypeConstructor;
 import org.panda_lang.language.architecture.type.signature.AdjustedMember;
 import org.panda_lang.language.interpreter.source.Localizable;
@@ -44,7 +45,8 @@ public SelfConstructor(Localizable localizable, AdjustedMember<TypeConstructor>
 
     @Override
     public @Nullable Object execute(ProcessStack stack, Object instance) throws Exception {
-        return constructor.invoke(stack, instance, ExpressionUtils.evaluate(stack, instance, arguments));
+        ConstructorFrame constructorFrame = (ConstructorFrame) instance;
+        return constructor.invoke(stack, constructorFrame.getInstance(), ExpressionUtils.evaluate(stack, instance, arguments));
     }
 
 }

panda/src/test/groovy/org/panda_lang/panda/examples/lang/TypeTest.groovy

@@ -0,0 +1,14 @@
+package org.panda_lang.panda.examples.lang
+
+import groovy.transform.CompileStatic
+import org.junit.jupiter.api.Test
+
+@CompileStatic
+class TypeTest extends LangTestSpecification {
+
+    @Test
+    void 'should handle types' () {
+        launch 'type.panda'
+    }
+
+}