add test for interpolated string

fix minor todo

jslib/src/core/math.kt

@@ -3,7 +3,8 @@ package js;
 import js.native
 
 native
-val Math = object {
+class MathClass() {
+    val PI : Double = 1.0;
     fun random() : Double = 0.0;
     fun abs(value : Double) = 0.0
     fun acos(value : Double) = 0.0
@@ -17,10 +18,13 @@ val Math = object {
     fun min(vararg values : Double) = 0.0
     fun sqrt(value : Double) = 0.0
     fun tan(value : Double) = 0.0
-
     fun log(value : Double) = 0.0
     fun pow(base : Double, exp : Double) = 0.0
     fun round(value : Double) = 0.0
     fun floor(value : Double) = 0.0
     fun ceil(value : Double) = 0.0
-}
+
+}
+
+native
+val Math = MathClass();

translator/src/org/jetbrains/k2js/translate/reference/PropertyAccessTranslator.java

@@ -79,10 +79,7 @@ public abstract class PropertyAccessTranslator extends AccessTranslator {
     public static boolean canBePropertyGetterCall(@NotNull JetQualifiedExpression expression,
                                                   @NotNull TranslationContext context) {
         JetSimpleNameExpression selector = getSelectorAsSimpleName(expression);
-        if (selector == null) {
-            //TODO: never get there. review
-            return false;
-        }
+        assert selector != null : "Only names are allowed after the dot";
         return canBePropertyGetterCall(selector, context);
     }
 

translator/testFiles/expression/string/cases/objectToStringCallInTemplate.kt

@@ -0,0 +1,18 @@
+package foo
+
+class A(var i : Int) {
+    fun toString() = "a$i"
+}
+
+fun box() : Boolean {
+    var p = A(2);
+    var n = A(1);
+    if ("$p$n" != "a2a1") {
+        return false;
+    }
+    if ("${A(10)}" != "a10") {
+        return false;
+    }
+    return true;
+}
+

translatorTests/test/org/jetbrains/k2js/test/StringTest.java

@@ -12,28 +12,27 @@ public class StringTest extends AbstractExpressionTest {
         return MAIN;
     }
 
-
     public void testStringConstant() throws Exception {
         testFooBoxIsTrue("stringConstant.kt");
     }
 
-
     public void testStringAssignment() throws Exception {
         testFooBoxIsTrue("stringAssignment.kt");
     }
 
-
     public void testIntInTemplate() throws Exception {
         testFunctionOutput("intInTemplate.kt", "foo", "box", "my age is 3");
     }
 
-
     public void testStringInTemplate() throws Exception {
         testFunctionOutput("stringInTemplate.kt", "foo", "box", "oHelloo");
     }
 
-
     public void testMultipleExpressionInTemplate() throws Exception {
         testFunctionOutput("multipleExpressionsInTemplate.kt", "foo", "box", "left = 3\nright = 2\nsum = 5\n");
     }
+
+    public void testToStringMethod() throws Exception {
+        testFooBoxIsTrue("objectToStringCallInTemplate.kt");
+    }
 }