Refactor common test set up and tear down code

test/function/builtin/APPLYTest.java

@@ -8,8 +8,9 @@ import org.junit.Test;
 import function.ArgumentValidator.*;
 import function.builtin.EVAL.UndefinedFunctionException;
 import sexpression.Cons;
+import testutil.SymbolAndFunctionCleaner;
 
-public class APPLYTest {
+public class APPLYTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void applyWithSymbol() {

test/function/builtin/EVALTest.java

@@ -10,8 +10,9 @@ import org.junit.Test;
 import function.ArgumentValidator.*;
 import function.builtin.BackquoteEvaluator.AtSignNotInCommaException;
 import function.builtin.EVAL.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class EVALTest {
+public class EVALTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void evalNumber() {

test/function/builtin/EXITTest.java

@@ -5,12 +5,13 @@ import static testutil.TestUtilities.evaluateString;
 
 import java.util.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import environment.RuntimeEnvironment;
 import function.ArgumentValidator.TooManyArgumentsException;
+import testutil.SymbolAndFunctionCleaner;
 
-public class EXITTest {
+public class EXITTest extends SymbolAndFunctionCleaner {
 
     private static final String TERMINATED = "terminated";
     private RuntimeEnvironment environment;
@@ -28,15 +29,15 @@ public class EXITTest {
         assertFalse(indicatorSet.contains(TERMINATED));
     }
 
-    @Before
-    public void setUp() {
+    @Override
+    public void additionalSetUp() {
         indicatorSet = new HashSet<>();
         environment.reset();
         environment.setTerminationFunction(() -> indicatorSet.add(TERMINATED));
     }
 
-    @After
-    public void tearDown() {
+    @Override
+    public void additionalTearDown() {
         environment.reset();
     }
 

test/function/builtin/FUNCALLTest.java

@@ -1,23 +1,13 @@
 package function.builtin;
 
-import static table.FunctionTable.resetFunctionTable;
 import static testutil.TestUtilities.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import function.ArgumentValidator.TooFewArgumentsException;
+import testutil.SymbolAndFunctionCleaner;
 
-public class FUNCALLTest {
-
-    @Before
-    public void setUp() {
-        resetFunctionTable();
-    }
-
-    @After
-    public void tearDown() {
-        resetFunctionTable();
-    }
+public class FUNCALLTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void funcallWithNumbers() {

test/function/builtin/GENSYMTest.java

@@ -7,9 +7,10 @@ import static testutil.TypeAssertions.assertSymbol;
 import org.junit.Test;
 
 import function.ArgumentValidator.TooManyArgumentsException;
+import testutil.SymbolAndFunctionCleaner;
 import token.TokenFactory.BadCharacterException;
 
-public class GENSYMTest {
+public class GENSYMTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void gensymCreatesSymbol() {

test/function/builtin/LOADTest.java

@@ -6,13 +6,14 @@ import static testutil.TypeAssertions.*;
 
 import java.io.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import environment.RuntimeEnvironment;
 import error.ErrorManager;
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class LOADTest {
+public class LOADTest extends SymbolAndFunctionCleaner {
 
     private ByteArrayOutputStream outputStream;
     private ByteArrayOutputStream errorOutputStream;
@@ -37,8 +38,8 @@ public class LOADTest {
         assertTrue(outputStream.toByteArray().length == 0);
     }
 
-    @Before
-    public void setUp() {
+    @Override
+    public void additionalSetUp() {
         outputStream = new ByteArrayOutputStream();
         errorOutputStream = new ByteArrayOutputStream();
 
@@ -51,8 +52,8 @@ public class LOADTest {
         environment.setErrorOutputDecorator(s -> s);
     }
 
-    @After
-    public void tearDown() {
+    @Override
+    public void additionalTearDown() {
         environment.reset();
     }
 

test/function/builtin/PRINTTest.java

@@ -6,12 +6,13 @@ import static testutil.TestUtilities.evaluateString;
 
 import java.io.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import environment.RuntimeEnvironment;
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class PRINTTest {
+public class PRINTTest extends SymbolAndFunctionCleaner {
 
     private RuntimeEnvironment environment;
     private ByteArrayOutputStream outputStream;
@@ -24,15 +25,15 @@ public class PRINTTest {
         assertEquals(expected, outputStream.toString());
     }
 
-    @Before
-    public void setUp() {
+    @Override
+    public void additionalSetUp() {
         outputStream = new ByteArrayOutputStream();
         environment.reset();
         environment.setOutput(new PrintStream(outputStream));
     }
 
-    @After
-    public void tearDown() {
+    @Override
+    public void additionalTearDown() {
         environment.reset();
     }
 

test/function/builtin/SETTest.java

@@ -3,30 +3,15 @@ package function.builtin;
 import static org.junit.Assert.assertNull;
 import static testutil.TestUtilities.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import function.ArgumentValidator.*;
 import function.builtin.EVAL.UndefinedSymbolException;
 import sexpression.LispNumber;
-import table.*;
+import table.SymbolTable;
+import testutil.SymbolAndFunctionCleaner;
 
-public class SETTest {
-
-    private ExecutionContext executionContext;
-
-    public SETTest() {
-        this.executionContext = ExecutionContext.getInstance();
-    }
-
-    @Before
-    public void setUp() {
-        executionContext.clearContext();
-    }
-
-    @After
-    public void tearDown() {
-        executionContext.clearContext();
-    }
+public class SETTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void set() {

test/function/builtin/SYMBOL_FUNCTIONTest.java

@@ -3,25 +3,15 @@ package function.builtin;
 import static error.ErrorManager.Severity.ERROR;
 import static org.junit.Assert.*;
 import static sexpression.Nil.NIL;
-import static table.FunctionTable.resetFunctionTable;
 import static testutil.TestUtilities.evaluateString;
 
-import org.junit.*;
+import org.junit.Test;
 
 import function.ArgumentValidator.*;
 import function.builtin.SYMBOL_FUNCTION.UndefinedSymbolFunctionException;
+import testutil.SymbolAndFunctionCleaner;
 
-public class SYMBOL_FUNCTIONTest {
-
-    @Before
-    public void setUp() {
-        resetFunctionTable();
-    }
-
-    @After
-    public void tearDown() {
-        resetFunctionTable();
-    }
+public class SYMBOL_FUNCTIONTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void symbolFunction_BuiltInFunction() {

test/function/builtin/cons/CONSTest.java

@@ -6,8 +6,9 @@ import org.junit.Test;
 
 import function.ArgumentValidator.*;
 import sexpression.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class CONSTest {
+public class CONSTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void consWithNilValues() {

test/function/builtin/cons/FIRSTTest.java

@@ -5,8 +5,9 @@ import static testutil.TestUtilities.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class FIRSTTest {
+public class FIRSTTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void firstOfNil() {

test/function/builtin/cons/LENGTHTest.java

@@ -5,8 +5,9 @@ import static testutil.TestUtilities.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class LENGTHTest {
+public class LENGTHTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void lengthOfNil() {

test/function/builtin/cons/LISTTest.java

@@ -5,7 +5,9 @@ import static testutil.TestUtilities.*;
 
 import org.junit.Test;
 
-public class LISTTest {
+import testutil.SymbolAndFunctionCleaner;
+
+public class LISTTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void listWithNoArguments() {

test/function/builtin/cons/RESTTest.java

@@ -5,8 +5,9 @@ import static testutil.TestUtilities.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class RESTTest {
+public class RESTTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void restOfNil() {

test/function/builtin/math/DIVIDETest.java

@@ -5,8 +5,9 @@ import static testutil.TestUtilities.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class DIVIDETest {
+public class DIVIDETest extends SymbolAndFunctionCleaner {
 
     @Test
     public void divideWithOne() {

test/function/builtin/math/MINUSTest.java

@@ -6,8 +6,9 @@ import org.junit.Test;
 
 import function.ArgumentValidator.*;
 import sexpression.LispNumber;
+import testutil.SymbolAndFunctionCleaner;
 
-public class MINUSTest {
+public class MINUSTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void minusWithOneNumber() {

test/function/builtin/math/MULTIPLYTest.java

@@ -6,8 +6,9 @@ import org.junit.Test;
 
 import function.ArgumentValidator.BadArgumentTypeException;
 import sexpression.LispNumber;
+import testutil.SymbolAndFunctionCleaner;
 
-public class MULTIPLYTest {
+public class MULTIPLYTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void multiplyWithNoArguments() {

test/function/builtin/math/PLUSTest.java

@@ -6,8 +6,9 @@ import org.junit.Test;
 
 import function.ArgumentValidator.BadArgumentTypeException;
 import sexpression.LispNumber;
+import testutil.SymbolAndFunctionCleaner;
 
-public class PLUSTest {
+public class PLUSTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void plusWithNoArguments() {

test/function/builtin/predicate/ATOMTest.java

@@ -6,8 +6,9 @@ import static testutil.TypeAssertions.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class ATOMTest {
+public class ATOMTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void atomIsAtom() {

test/function/builtin/predicate/EQTest.java

@@ -6,8 +6,9 @@ import static testutil.TypeAssertions.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class EQTest {
+public class EQTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void eqWithEqualAtoms() {

test/function/builtin/predicate/EQUALTest.java

@@ -6,8 +6,9 @@ import static testutil.TypeAssertions.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class EQUALTest {
+public class EQUALTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void equalWithTwoEqualAtoms() {

test/function/builtin/predicate/GENSYM_EQUALTest.java

@@ -6,8 +6,9 @@ import static testutil.TypeAssertions.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class GENSYM_EQUALTest {
+public class GENSYM_EQUALTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void gensymEqualWithTwoEqualAtoms() {

test/function/builtin/predicate/LISTPTest.java

@@ -6,8 +6,9 @@ import static testutil.TypeAssertions.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class LISTPTest {
+public class LISTPTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void listpWithList() {

test/function/builtin/predicate/NULLTest.java

@@ -6,8 +6,9 @@ import static testutil.TypeAssertions.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class NULLTest {
+public class NULLTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void nilIsNull() {

test/function/builtin/predicate/NUMERIC_EQUALTest.java

@@ -6,8 +6,9 @@ import static testutil.TypeAssertions.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class NUMERIC_EQUALTest {
+public class NUMERIC_EQUALTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void numericEqualWithOneNumber() {

test/function/builtin/predicate/NUMERIC_GREATERTest.java

@@ -6,8 +6,9 @@ import static testutil.TypeAssertions.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class NUMERIC_GREATERTest {
+public class NUMERIC_GREATERTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void greaterThanWithOneNumber_ReturnsT() {

test/function/builtin/predicate/NUMERIC_LESSTest.java

@@ -6,8 +6,9 @@ import static testutil.TypeAssertions.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class NUMERIC_LESSTest {
+public class NUMERIC_LESSTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void lessThanWithOneNumber_ReturnsT() {

test/function/builtin/special/ANDTest.java

@@ -3,29 +3,13 @@ package function.builtin.special;
 import static testutil.TestUtilities.*;
 import static testutil.TypeAssertions.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import function.builtin.EVAL.UndefinedSymbolException;
 import sexpression.LispNumber;
-import table.ExecutionContext;
+import testutil.SymbolAndFunctionCleaner;
 
-public class ANDTest {
-
-    private ExecutionContext executionContext;
-
-    public ANDTest() {
-        this.executionContext = ExecutionContext.getInstance();
-    }
-
-    @Before
-    public void setUp() {
-        executionContext.clearContext();
-    }
-
-    @After
-    public void tearDown() {
-        executionContext.clearContext();
-    }
+public class ANDTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void andByItself() {

test/function/builtin/special/CASETest.java

@@ -2,28 +2,12 @@ package function.builtin.special;
 
 import static testutil.TestUtilities.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import function.ArgumentValidator.*;
-import table.ExecutionContext;
+import testutil.SymbolAndFunctionCleaner;
 
-public class CASETest {
-
-    private ExecutionContext executionContext;
-
-    public CASETest() {
-        this.executionContext = ExecutionContext.getInstance();
-    }
-
-    @Before
-    public void setUp() {
-        executionContext.clearContext();
-    }
-
-    @After
-    public void tearDown() {
-        executionContext.clearContext();
-    }
+public class CASETest extends SymbolAndFunctionCleaner {
 
     @Test
     public void caseWithKeyOnly() {

test/function/builtin/special/CONDTest.java

@@ -5,8 +5,9 @@ import static testutil.TestUtilities.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class CONDTest {
+public class CONDTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void condWithNoArguments() {

test/function/builtin/special/DEFINE_SPECIALTest.java

@@ -1,19 +1,19 @@
 package function.builtin.special;
 
 import static org.junit.Assert.assertTrue;
-import static table.FunctionTable.resetFunctionTable;
 import static testutil.TestUtilities.*;
 
 import java.io.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import environment.RuntimeEnvironment;
 import error.ErrorManager;
 import function.ArgumentValidator.*;
 import function.UserDefinedFunction.IllegalKeywordRestPositionException;
+import testutil.SymbolAndFunctionCleaner;
 
-public class DEFINE_SPECIALTest {
+public class DEFINE_SPECIALTest extends SymbolAndFunctionCleaner {
 
     private ByteArrayOutputStream outputStream;
     private RuntimeEnvironment environment;
@@ -26,21 +26,19 @@ public class DEFINE_SPECIALTest {
         assertTrue(outputStream.toByteArray().length > 0);
     }
 
-    @Before
-    public void setUp() {
+    @Override
+    public void additionalSetUp() {
         outputStream = new ByteArrayOutputStream();
 
         environment.reset();
         environment.setOutput(new PrintStream(outputStream));
         environment.setErrorManager(new ErrorManager());
         environment.setWarningOutputDecorator(s -> s);
-        resetFunctionTable();
     }
 
-    @After
-    public void tearDown() {
+    @Override
+    public void additionalTearDown() {
         environment.reset();
-        resetFunctionTable();
     }
 
     @Test

test/function/builtin/special/DEFMACROTest.java

@@ -1,19 +1,19 @@
 package function.builtin.special;
 
 import static org.junit.Assert.assertTrue;
-import static table.FunctionTable.resetFunctionTable;
 import static testutil.TestUtilities.*;
 
 import java.io.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import environment.RuntimeEnvironment;
 import error.ErrorManager;
 import function.ArgumentValidator.*;
 import function.UserDefinedFunction.IllegalKeywordRestPositionException;
+import testutil.SymbolAndFunctionCleaner;
 
-public class DEFMACROTest {
+public class DEFMACROTest extends SymbolAndFunctionCleaner {
 
     private ByteArrayOutputStream outputStream;
     private RuntimeEnvironment environment;
@@ -26,21 +26,19 @@ public class DEFMACROTest {
         assertTrue(outputStream.toByteArray().length > 0);
     }
 
-    @Before
-    public void setUp() {
+    @Override
+    public void additionalSetUp() {
         outputStream = new ByteArrayOutputStream();
 
         environment.reset();
         environment.setOutput(new PrintStream(outputStream));
         environment.setErrorManager(new ErrorManager());
         environment.setWarningOutputDecorator(s -> s);
-        resetFunctionTable();
     }
 
-    @After
-    public void tearDown() {
+    @Override
+    public void additionalTearDown() {
         environment.reset();
-        resetFunctionTable();
     }
 
     @Test

test/function/builtin/special/DEFUNTest.java

@@ -1,19 +1,19 @@
 package function.builtin.special;
 
 import static org.junit.Assert.assertTrue;
-import static table.FunctionTable.resetFunctionTable;
 import static testutil.TestUtilities.*;
 
 import java.io.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import environment.RuntimeEnvironment;
 import error.ErrorManager;
 import function.ArgumentValidator.*;
 import function.UserDefinedFunction.IllegalKeywordRestPositionException;
+import testutil.SymbolAndFunctionCleaner;
 
-public class DEFUNTest {
+public class DEFUNTest extends SymbolAndFunctionCleaner {
 
     private ByteArrayOutputStream outputStream;
     private RuntimeEnvironment environment;
@@ -26,21 +26,19 @@ public class DEFUNTest {
         assertTrue(outputStream.toByteArray().length > 0);
     }
 
-    @Before
-    public void setUp() {
+    @Override
+    public void additionalSetUp() {
         outputStream = new ByteArrayOutputStream();
 
         environment.reset();
         environment.setOutput(new PrintStream(outputStream));
         environment.setErrorManager(new ErrorManager());
         environment.setWarningOutputDecorator(s -> s);
-        resetFunctionTable();
     }
 
-    @After
-    public void tearDown() {
+    @Override
+    public void additionalTearDown() {
         environment.reset();
-        resetFunctionTable();
     }
 
     @Test
@@ -121,6 +119,11 @@ public class DEFUNTest {
         evaluateString("(defun f a ())");
     }
 
+    @Test(expected = BadArgumentTypeException.class)
+    public void defunWithNonSymbolInLambdaList() {
+        evaluateString("(defun f (1) ())");
+    }
+
     @Test(expected = TooFewArgumentsException.class)
     public void defunWithTooFewArguments() {
         evaluateString("(defun f)");

test/function/builtin/special/IFTest.java

@@ -3,29 +3,13 @@ package function.builtin.special;
 import static testutil.TestUtilities.evaluateString;
 import static testutil.TypeAssertions.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import function.ArgumentValidator.*;
 import function.builtin.EVAL.UndefinedSymbolException;
-import table.ExecutionContext;
+import testutil.SymbolAndFunctionCleaner;
 
-public class IFTest {
-
-    private ExecutionContext executionContext;
-
-    public IFTest() {
-        this.executionContext = ExecutionContext.getInstance();
-    }
-
-    @Before
-    public void setUp() {
-        executionContext.clearContext();
-    }
-
-    @After
-    public void tearDown() {
-        executionContext.clearContext();
-    }
+public class IFTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void ifWithOneExpression_ReturnsExpression() {

test/function/builtin/special/LAMBDATest.java

@@ -10,8 +10,9 @@ import org.junit.Test;
 
 import function.ArgumentValidator.*;
 import sexpression.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class LAMBDATest {
+public class LAMBDATest extends SymbolAndFunctionCleaner {
 
     @Test
     public void lambda() {

test/function/builtin/special/LETTest.java

@@ -3,30 +3,14 @@ package function.builtin.special;
 import static sexpression.Nil.NIL;
 import static testutil.TestUtilities.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import function.ArgumentValidator.*;
 import function.builtin.EVAL.UndefinedSymbolException;
 import sexpression.*;
-import table.ExecutionContext;
+import testutil.SymbolAndFunctionCleaner;
 
-public class LETTest {
-
-    private ExecutionContext executionContext;
-
-    public LETTest() {
-        this.executionContext = ExecutionContext.getInstance();
-    }
-
-    @Before
-    public void setUp() {
-        executionContext.clearContext();
-    }
-
-    @After
-    public void tearDown() {
-        executionContext.clearContext();
-    }
+public class LETTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void simpleLet() {

test/function/builtin/special/LET_STARTest.java

@@ -3,30 +3,14 @@ package function.builtin.special;
 import static sexpression.Nil.NIL;
 import static testutil.TestUtilities.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import function.ArgumentValidator.*;
 import function.builtin.EVAL.UndefinedSymbolException;
 import sexpression.*;
-import table.ExecutionContext;
+import testutil.SymbolAndFunctionCleaner;
 
-public class LET_STARTest {
-
-    private ExecutionContext executionContext;
-
-    public LET_STARTest() {
-        this.executionContext = ExecutionContext.getInstance();
-    }
-
-    @Before
-    public void setUp() {
-        executionContext.clearContext();
-    }
-
-    @After
-    public void tearDown() {
-        executionContext.clearContext();
-    }
+public class LET_STARTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void simpleLet() {

test/function/builtin/special/ORTest.java

@@ -3,29 +3,13 @@ package function.builtin.special;
 import static testutil.TestUtilities.*;
 import static testutil.TypeAssertions.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import function.builtin.EVAL.UndefinedSymbolException;
 import sexpression.LispNumber;
-import table.ExecutionContext;
+import testutil.SymbolAndFunctionCleaner;
 
-public class ORTest {
-
-    private ExecutionContext executionContext;
-
-    public ORTest() {
-        this.executionContext = ExecutionContext.getInstance();
-    }
-
-    @Before
-    public void setUp() {
-        executionContext.clearContext();
-    }
-
-    @After
-    public void tearDown() {
-        executionContext.clearContext();
-    }
+public class ORTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void orByItself() {

test/function/builtin/special/PROGNTest.java

@@ -5,7 +5,9 @@ import static testutil.TypeAssertions.assertNil;
 
 import org.junit.Test;
 
-public class PROGNTest {
+import testutil.SymbolAndFunctionCleaner;
+
+public class PROGNTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void prognWithNoArguments() {

test/function/builtin/special/QUOTETest.java

@@ -5,8 +5,9 @@ import static testutil.TestUtilities.*;
 import org.junit.Test;
 
 import function.ArgumentValidator.*;
+import testutil.SymbolAndFunctionCleaner;
 
-public class QUOTETest {
+public class QUOTETest extends SymbolAndFunctionCleaner {
 
     @Test
     public void quoteSymbol() {

test/function/builtin/special/SETQTest.java

@@ -3,30 +3,15 @@ package function.builtin.special;
 import static org.junit.Assert.assertNull;
 import static testutil.TestUtilities.*;
 
-import org.junit.*;
+import org.junit.Test;
 
 import function.ArgumentValidator.*;
 import function.builtin.EVAL.UndefinedSymbolException;
 import sexpression.LispNumber;
-import table.*;
+import table.SymbolTable;
+import testutil.SymbolAndFunctionCleaner;
 
-public class SETQTest {
-
-    private ExecutionContext executionContext;
-
-    public SETQTest() {
-        this.executionContext = ExecutionContext.getInstance();
-    }
-
-    @Before
-    public void setUp() {
-        executionContext.clearContext();
-    }
-
-    @After
-    public void tearDown() {
-        executionContext.clearContext();
-    }
+public class SETQTest extends SymbolAndFunctionCleaner {
 
     @Test
     public void setq() {

test/testutil/SymbolAndFunctionCleaner.java

@@ -0,0 +1,35 @@
+package testutil;
+
+import static table.FunctionTable.resetFunctionTable;
+
+import org.junit.*;
+
+import table.ExecutionContext;
+
+public abstract class SymbolAndFunctionCleaner {
+
+    protected ExecutionContext executionContext;
+
+    public SymbolAndFunctionCleaner() {
+        this.executionContext = ExecutionContext.getInstance();
+    }
+
+    @Before
+    public final void setUp() {
+        executionContext.clearContext();
+        resetFunctionTable();
+        additionalSetUp();
+    }
+
+    @After
+    public final void tearDown() {
+        executionContext.clearContext();
+        resetFunctionTable();
+        additionalTearDown();
+    }
+
+    public void additionalSetUp() {}
+
+    public void additionalTearDown() {}
+
+}