[commons-jexl] branch master updated: JEXL-307: added test case on contextually exposed options Task #JEXL-307 - Variable redeclaration option

[henrib]

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henrib pushed a commit to branch master
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The following commit(s) were added to refs/heads/master by this push:
     new 2b63192  JEXL-307: added test case on contextually exposed options 
Task #JEXL-307 - Variable redeclaration option
2b63192 is described below

commit 2b63192c9485c75ea2cfff51bb6d153479a1c7ea
Author: henrib <hen...@apache.org>
AuthorDate: Tue Nov 19 11:42:43 2019 +0100

    JEXL-307: added test case on contextually exposed options
    Task #JEXL-307 - Variable redeclaration option
---
 .../java/org/apache/commons/jexl3/JexlOptions.java |  2 +-
 .../java/org/apache/commons/jexl3/LexicalTest.java | 57 +++++++++++++++++++++-
 2 files changed, 57 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/apache/commons/jexl3/JexlOptions.java 
b/src/main/java/org/apache/commons/jexl3/JexlOptions.java
index 98c46ef..7d3df9e 100644
--- a/src/main/java/org/apache/commons/jexl3/JexlOptions.java
+++ b/src/main/java/org/apache/commons/jexl3/JexlOptions.java
@@ -31,7 +31,7 @@ import org.apache.commons.jexl3.internal.Engine;
  * <li>lexicalShade: whether local variables shade global ones even outside 
their scope</li>
  * <li>strict: whether unknown or unsolvable identifiers are errors</li>
  * <li>strictArithmetic: whether null as operand is an error</li>
- * <li>immutable: whether these options can be modified at runtime during 
execution (expert)</li>
+ * <li>sharedInstance: whether these options can be modified at runtime during 
execution (expert)</li>
  * </ul>
  * The sensible default is cancellable, strict and strictArithmetic.
  * <p>This interface replaces the now deprecated JexlEngine.Options.
diff --git a/src/test/java/org/apache/commons/jexl3/LexicalTest.java 
b/src/test/java/org/apache/commons/jexl3/LexicalTest.java
index 9f7b9c9..2c6b2f7 100644
--- a/src/test/java/org/apache/commons/jexl3/LexicalTest.java
+++ b/src/test/java/org/apache/commons/jexl3/LexicalTest.java
@@ -18,6 +18,7 @@ package org.apache.commons.jexl3;
 
 import java.io.StringReader;
 import java.io.StringWriter;
+import java.util.Map;
 import java.util.Set;
 import org.apache.commons.jexl3.internal.LexicalScope;
 import org.junit.Assert;
@@ -388,7 +389,7 @@ public class LexicalTest {
     }
     
     @Test
-    public void testLexicalOption() throws Exception {
+    public void testContextualOptions0() throws Exception {
         JexlFeatures f= new JexlFeatures();
         JexlEngine jexl = new JexlBuilder().features(f).strict(true).create();
         JexlEvalContext ctxt = new JexlEvalContext();
@@ -405,4 +406,58 @@ public class LexicalTest {
             Assert.assertNotNull(xf);
         }
     }
+    
+    /**
+     * Context augmented with a tryCatch.
+     */
+    public static class TestContext extends JexlEvalContext {
+        public TestContext() {}
+        public TestContext(Map<String, Object> map) {
+            super(map);
+        }
+
+        /**
+         * Allows calling a script and catching its raised exception.
+         * @param tryFn the lambda to call
+         * @param catchFn the lambda catching the exception
+         * @param args the arguments to the lambda
+         * @return the tryFn result or the catchFn if an exception was raised
+         */
+        public Object tryCatch(JexlScript tryFn, JexlScript catchFn, Object... 
args) {
+            Object result;
+            try {
+                result = tryFn.execute(this, args);
+            } catch (Throwable xthrow) {
+                result = catchFn != null ? catchFn.execute(this, xthrow) : 
xthrow;
+            }
+            return result;
+        }
+    }
+
+    @Test
+    public void testContextualOptions1() throws Exception {
+        JexlFeatures f = new JexlFeatures();
+        JexlEngine jexl = new JexlBuilder().features(f).strict(true).create();
+        JexlEvalContext ctxt = new TestContext();
+        JexlOptions options = ctxt.getEngineOptions();
+        options.setSharedInstance(true);
+        options.setLexical(true);
+        options.setLexicalShade(true);
+        ctxt.set("options", options);
+        JexlScript runner = jexl.createScript(
+                "options.lexical = flag; options.lexicalShade = flag;"
+              + "tryCatch(test, catch, 42);",
+                "flag", "test", "catch");
+        JexlScript tested = jexl.createScript("(y)->{ {var x = y;} x }");
+        JexlScript catchFn = jexl.createScript("(xany)-> { xany }");
+        Object result;
+        // run it once, old 3.1 semantics, lexical/shade = false
+        result = runner.execute(ctxt, false, tested, catchFn);
+        // result 42
+        Assert.assertEquals(42, result);
+        // run it a second time, new 3.2 semantics, lexical/shade = true
+        result = runner.execute(ctxt, true, tested, catchFn);
+        // result is exception!
+        Assert.assertTrue(result instanceof JexlException.Variable);
+    }
 }