Rename getPi to piFor.

0c16bb4e9b

src/main/java/org/nwapw/abacus/Abacus.java

@@ -6,16 +6,12 @@ import org.nwapw.abacus.number.NumberInterface;
 import org.nwapw.abacus.parsing.LexerTokenizer;
 import org.nwapw.abacus.parsing.ShuntingYardParser;
 import org.nwapw.abacus.parsing.TreeBuilder;
-import org.nwapw.abacus.plugin.ClassFinder;
 import org.nwapw.abacus.plugin.NumberImplementation;
 import org.nwapw.abacus.plugin.PluginManager;
 import org.nwapw.abacus.plugin.StandardPlugin;
 import org.nwapw.abacus.tree.NumberReducer;
 import org.nwapw.abacus.tree.TreeNode;
 
-import java.io.File;
-import java.io.IOException;
-
 /**
  * The main calculator class. This is responsible
  * for piecing together all of the components, allowing
@@ -27,10 +23,6 @@ public class Abacus {
      * The default number implementation to be used if no other one is available / selected.
      */
     public static final NumberImplementation DEFAULT_IMPLEMENTATION = StandardPlugin.IMPLEMENTATION_NAIVE;
-    /**
-     * The file used for saving and loading configuration.
-     */
-    public static final File CONFIG_FILE = new File("config.toml");
 
     /**
      * The plugin manager responsible for
@@ -54,26 +46,19 @@ public class Abacus {
 
     /**
      * Creates a new instance of the Abacus calculator.
+     *
+     * @param configuration the configuration object for this Abacus instance.
      */
-    public Abacus() {
+    public Abacus(Configuration configuration) {
         pluginManager = new PluginManager(this);
         numberReducer = new NumberReducer(this);
-        configuration = new Configuration(CONFIG_FILE);
-        configuration.saveTo(CONFIG_FILE);
+        this.configuration = new Configuration(configuration);
         LexerTokenizer lexerTokenizer = new LexerTokenizer();
         ShuntingYardParser shuntingYardParser = new ShuntingYardParser(this);
         treeBuilder = new TreeBuilder<>(lexerTokenizer, shuntingYardParser);
 
-        pluginManager.addListener(lexerTokenizer);
         pluginManager.addListener(shuntingYardParser);
-        pluginManager.addInstantiated(new StandardPlugin(pluginManager));
-        try {
-            ClassFinder.loadJars("plugins")
-                    .forEach(plugin -> pluginManager.addClass(plugin));
-        } catch (IOException | ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-        pluginManager.load();
+        pluginManager.addListener(lexerTokenizer);
     }
 
     public static void main(String[] args) {

src/main/java/org/nwapw/abacus/config/Configuration.java

@@ -39,6 +39,15 @@ public class Configuration {
      */
     private Set<String> disabledPlugins = new HashSet<>();
 
+    /**
+     * Creates a new configuration form the given configuration.
+     *
+     * @param copyFrom the configuration to copy.
+     */
+    public Configuration(Configuration copyFrom){
+        copyFrom(copyFrom);
+    }
+
     /**
      * Creates a new configuration with the given values.
      *
@@ -85,6 +94,15 @@ public class Configuration {
         }
     }
 
+    /**
+     * Gets the value of this configuration as a string.
+     *
+     * @return the string that represents this configuration.
+     */
+    public String asTomlString(){
+        return TOML_WRITER.write(this);
+    }
+
     /**
      * Gets the number implementation from this configuration.
      *

src/main/java/org/nwapw/abacus/function/Operator.java

@@ -26,6 +26,7 @@ public class Operator {
      * Creates a new operator with the given parameters.
      *
      * @param associativity the associativity of the operator.
+     * @param operatorType  the type of this operator, like binary infix or unary postfix.
      * @param precedence    the precedence of the operator.
      * @param function      the function that the operator calls.
      */

src/main/java/org/nwapw/abacus/fx/AbacusController.java

@@ -13,10 +13,14 @@ import org.nwapw.abacus.Abacus;
 import org.nwapw.abacus.config.Configuration;
 import org.nwapw.abacus.number.ComputationInterruptedException;
 import org.nwapw.abacus.number.NumberInterface;
+import org.nwapw.abacus.plugin.ClassFinder;
 import org.nwapw.abacus.plugin.PluginListener;
 import org.nwapw.abacus.plugin.PluginManager;
+import org.nwapw.abacus.plugin.StandardPlugin;
 import org.nwapw.abacus.tree.TreeNode;
 
+import java.io.File;
+import java.io.IOException;
 import java.util.Set;
 
 
@@ -26,6 +30,10 @@ import java.util.Set;
  */
 public class AbacusController implements PluginListener {
 
+    /**
+     * The file used for saving and loading configuration.
+     */
+    public static final File CONFIG_FILE = new File("config.toml");
     /**
      * The title for the apply alert dialog.
      */
@@ -205,9 +213,16 @@ public class AbacusController implements PluginListener {
             if (oldValue.equals(settingsTab)) alertIfApplyNeeded(true);
         });
 
-        abacus = new Abacus();
-        abacus.getPluginManager().addListener(this);
-        abacus.getPluginManager().reload();
+        abacus = new Abacus(new Configuration(CONFIG_FILE));
+        PluginManager abacusPluginManager = abacus.getPluginManager();
+        abacusPluginManager.addListener(this);
+        abacusPluginManager.addInstantiated(new StandardPlugin(abacus.getPluginManager()));
+        try {
+            ClassFinder.loadJars("plugins").forEach(abacusPluginManager::addClass);
+        } catch (IOException | ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+        abacusPluginManager.reload();
 
         changesMade = false;
         reloadAlertShown = false;
@@ -255,7 +270,7 @@ public class AbacusController implements PluginListener {
         for (ToggleablePlugin pluginEntry : enabledPlugins) {
             if (!pluginEntry.isEnabled()) disabledPlugins.add(pluginEntry.getClassName());
         }
-        configuration.saveTo(Abacus.CONFIG_FILE);
+        configuration.saveTo(CONFIG_FILE);
         changesMade = false;
         reloadAlertShown = false;
     }

src/main/java/org/nwapw/abacus/lexing/pattern/ValueNode.java

@@ -15,7 +15,7 @@ public class ValueNode<T> extends PatternNode<T> {
     /**
      * Creates a new node that matches the given character.
      *
-     * @param value
+     * @param value the character value of the node.
      */
     public ValueNode(char value) {
         this.value = value;

src/main/java/org/nwapw/abacus/number/NumberInterface.java

@@ -182,7 +182,7 @@ public abstract class NumberInterface {
      * Also, checks if the thread has been interrupted, and if so, throws
      * an exception.
      *
-     * @return the least integer >= the number, if int can hold the value.
+     * @return the least integer bigger or equal to the number, if int can hold the value.
      */
     public final NumberInterface ceiling(){
         checkInterrupted();
@@ -192,7 +192,7 @@ public abstract class NumberInterface {
     /**
      * Return the greatest integer less than or equal to the number.
      *
-     * @return the greatest int >= the number, if int can hold the value.
+     * @return the greatest integer smaller or equal the number, if int can hold the value.
      */
     protected abstract NumberInterface floorInternal();
 
@@ -230,7 +230,7 @@ public abstract class NumberInterface {
      * Returns the integer representation of this number, discarding any fractional part,
      * if int can hold the value.
      *
-     * @return
+     * @return the integer value of this number.
      */
     public abstract int intValue();
 

src/main/java/org/nwapw/abacus/plugin/NumberImplementation.java

@@ -28,7 +28,7 @@ public abstract class NumberImplementation {
      * Creates a new number implementation with the given data.
      *
      * @param implementation the implementation class.
-     * @param priority       the priority, higher -> more likely to be converted into.
+     * @param priority       the priority, higher means more likely to be converted into.
      */
     public NumberImplementation(Class<? extends NumberInterface> implementation, int priority) {
         this.implementation = implementation;

src/main/java/org/nwapw/abacus/plugin/Plugin.java

@@ -17,18 +17,6 @@ import java.util.Set;
  */
 public abstract class Plugin {
 
-    /**
-     * A hash map of functions mapped to their string names.
-     */
-    private Map<String, Function> functions;
-    /**
-     * A hash map of operators mapped to their string names.
-     */
-    private Map<String, Operator> operators;
-    /**
-     * The map of the number implementations this plugin provides.
-     */
-    private Map<String, NumberImplementation> numberImplementations;
     /**
      * The plugin manager in which to search for functions
      * not inside this package,
@@ -49,69 +37,9 @@ public abstract class Plugin {
      */
     public Plugin(PluginManager manager) {
         this.manager = manager;
-        functions = new HashMap<>();
-        operators = new HashMap<>();
-        numberImplementations = new HashMap<>();
         enabled = false;
     }
 
-    /**
-     * Gets the list of functions provided by this plugin.
-     *
-     * @return the list of registered functions.
-     */
-    public final Set<String> providedFunctions() {
-        return functions.keySet();
-    }
-
-    /**
-     * Gets the list of functions provided by this plugin.
-     *
-     * @return the list of registered functions.
-     */
-    public final Set<String> providedOperators() {
-        return operators.keySet();
-    }
-
-    /**
-     * Gets the list of number implementations provided by this plugin.
-     *
-     * @return the list of registered number implementations.
-     */
-    public final Set<String> providedNumberImplementations() {
-        return numberImplementations.keySet();
-    }
-
-    /**
-     * Gets a function under the given function name.
-     *
-     * @param functionName the name of the function to get
-     * @return the function, or null if this plugin doesn't provide it.
-     */
-    public final Function getFunction(String functionName) {
-        return functions.get(functionName);
-    }
-
-    /**
-     * Gets an operator under the given operator name.
-     *
-     * @param operatorName the name of the operator to get.
-     * @return the operator, or null if this plugin doesn't provide it.
-     */
-    public final Operator getOperator(String operatorName) {
-        return operators.get(operatorName);
-    }
-
-    /**
-     * Gets the number implementation under the given name.
-     *
-     * @param name the name of the number implementation to look up.
-     * @return the number implementation associated with that name, or null if the plugin doesn't provide it.
-     */
-    public final NumberImplementation getNumberImplementation(String name) {
-        return numberImplementations.get(name);
-    }
-
     /**
      * Enables the function, loading the necessary instances
      * of functions.
@@ -129,8 +57,6 @@ public abstract class Plugin {
     public final void disable() {
         if (!enabled) return;
         onDisable();
-        functions.clear();
-        operators.clear();
         enabled = false;
     }
 
@@ -142,7 +68,7 @@ public abstract class Plugin {
      * @param toRegister the function implementation.
      */
     protected final void registerFunction(String name, Function toRegister) {
-        functions.put(name, toRegister);
+        manager.registerFunction(name, toRegister);
     }
 
     /**
@@ -154,7 +80,7 @@ public abstract class Plugin {
      * @param operator the operator to register.
      */
     protected final void registerOperator(String name, Operator operator) {
-        operators.put(name, operator);
+        manager.registerOperator(name, operator);
     }
 
     /**
@@ -165,7 +91,7 @@ public abstract class Plugin {
      * @param implementation the actual implementation class to register.
      */
     protected final void registerNumberImplementation(String name, NumberImplementation implementation) {
-        numberImplementations.put(name, implementation);
+        manager.registerNumberImplementation(name, implementation);
     }
 
     /**
@@ -213,7 +139,7 @@ public abstract class Plugin {
      * @param forClass the class to which to find the pi instance.
      * @return the pi value for the given class.
      */
-    protected final NumberInterface getPi(Class<? extends NumberInterface> forClass) {
+    protected final NumberInterface piFor(Class<? extends NumberInterface> forClass) {
         return manager.piFor(forClass);
     }
 

src/main/java/org/nwapw/abacus/plugin/PluginManager.java

@@ -23,20 +23,17 @@ public class PluginManager {
      */
     private Set<Plugin> plugins;
     /**
-     * List of functions that have been cached,
-     * that is, found in a plugin and returned.
+     * The map of functions registered by the plugins.
      */
-    private Map<String, Function> cachedFunctions;
+    private Map<String, Function> registeredFunctions;
     /**
-     * List of operators that have been cached,
-     * that is, found in a plugin and returned.
+     * The map of operators registered by the plugins
      */
-    private Map<String, Operator> cachedOperators;
+    private Map<String, Operator> registeredOperators;
     /**
-     * The list of number implementations that have
-     * been cached, that is, found in a plugin and returned.
+     * The map of number implementations registered by the plugins.
      */
-    private Map<String, NumberImplementation> cachedNumberImplementations;
+    private Map<String, NumberImplementation> registeredNumberImplementations;
     /**
      * The list of number implementations that have been
      * found by their implementation class.
@@ -46,18 +43,6 @@ public class PluginManager {
      * The pi values for each implementation class that have already been computer.
      */
     private Map<Class<? extends NumberInterface>, NumberInterface> cachedPi;
-    /**
-     * List of all functions loaded by the plugins.
-     */
-    private Set<String> allFunctions;
-    /**
-     * List of all operators loaded by the plugins.
-     */
-    private Set<String> allOperators;
-    /**
-     * List of all the number implementations loaded by the plugins.
-     */
-    private Set<String> allNumberImplementations;
     /**
      * The list of plugin listeners attached to this instance.
      */
@@ -70,84 +55,73 @@ public class PluginManager {
 
     /**
      * Creates a new plugin manager.
+     *
+     * @param abacus the abacus instance.
      */
     public PluginManager(Abacus abacus) {
         this.abacus = abacus;
         loadedPluginClasses = new HashSet<>();
         plugins = new HashSet<>();
-        cachedFunctions = new HashMap<>();
-        cachedOperators = new HashMap<>();
-        cachedNumberImplementations = new HashMap<>();
+        registeredFunctions = new HashMap<>();
+        registeredOperators = new HashMap<>();
+        registeredNumberImplementations = new HashMap<>();
         cachedInterfaceImplementations = new HashMap<>();
         cachedPi = new HashMap<>();
-        allFunctions = new HashSet<>();
-        allOperators = new HashSet<>();
-        allNumberImplementations = new HashSet<>();
         listeners = new HashSet<>();
     }
 
     /**
-     * Searches the plugin list for a certain value, retrieving the Plugin's
-     * list of items of the type using the setFunction and getting the value
-     * of it is available via getFunction. If the value is contained
-     * in the cache, it returns the cached value instead.
-     *
-     * @param plugins     the plugin list to search.
-     * @param cache       the cache to use
-     * @param setFunction the function to retrieve a set of available T's from the plugin
-     * @param getFunction the function to get the T value under the given name
-     * @param name        the name to search for
-     * @param <T>         the type of element being search
-     * @param <K>         the type of key that the cache is indexed by.
-     * @return the retrieved element, or null if it was not found.
+     * Registers a function under the given name.
+     * @param name the name of the function.
+     * @param function the function to register.
      */
-    private static <T, K> T searchCached(Collection<Plugin> plugins, Map<K, T> cache,
-                                         java.util.function.Function<Plugin, Set<K>> setFunction,
-                                         java.util.function.BiFunction<Plugin, K, T> getFunction,
-                                         K name) {
-        if (cache.containsKey(name)) return cache.get(name);
-
-        T loadedValue = null;
-        for (Plugin plugin : plugins) {
-            if (setFunction.apply(plugin).contains(name)) {
-                loadedValue = getFunction.apply(plugin, name);
-                break;
-            }
-        }
-
-        cache.put(name, loadedValue);
-        return loadedValue;
+    public void registerFunction(String name, Function function){
+        registeredFunctions.put(name, function);
     }
 
     /**
-     * Gets a function under the given name.
-     *
-     * @param name the name of the function
-     * @return the function under the given name.
+     * Registers an operator under the given name.
+     * @param name the name of the operator.
+     * @param operator the operator to register.
+     */
+    public void registerOperator(String name, Operator operator){
+        registeredOperators.put(name, operator);
+    }
+
+    /**
+     * Registers a number implementation under the given name.
+     * @param name the name of the number implementation.
+     * @param implementation the number implementation to register.
+     */
+    public void registerNumberImplementation(String name, NumberImplementation implementation){
+        registeredNumberImplementations.put(name, implementation);
+    }
+
+    /**
+     * Gets the function registered under the given name.
+     * @param name the name of the function.
+     * @return the function, or null if it was not found.
      */
     public Function functionFor(String name){
-        return searchCached(plugins, cachedFunctions, Plugin::providedFunctions, Plugin::getFunction, name);
+        return registeredFunctions.get(name);
     }
 
     /**
-     * Gets an operator under the given name.
-     *
+     * Gets the operator registered under the given name.
      * @param name the name of the operator.
-     * @return the operator under the given name.
+     * @return the operator, or null if it was not found.
      */
     public Operator operatorFor(String name){
-        return searchCached(plugins, cachedOperators, Plugin::providedOperators, Plugin::getOperator, name);
+        return registeredOperators.get(name);
     }
 
     /**
-     * Gets the number implementation under the given name.
-     *
-     * @param name the name of the implementation.
-     * @return the implementation.
+     * Gets the number implementation registered under the given name.
+     * @param name the name of the number implementation.
+     * @return the number implementation, or null if it was not found.
      */
     public NumberImplementation numberImplementationFor(String name){
-        return searchCached(plugins, cachedNumberImplementations, Plugin::providedNumberImplementations,
-                Plugin::getNumberImplementation, name);
+        return registeredNumberImplementations.get(name);
     }
 
     /**
@@ -159,14 +133,11 @@ public class PluginManager {
     public NumberImplementation interfaceImplementationFor(Class<? extends NumberInterface> name) {
         if (cachedInterfaceImplementations.containsKey(name)) return cachedInterfaceImplementations.get(name);
         NumberImplementation toReturn = null;
-        outside:
-        for (Plugin plugin : plugins) {
-            for (String implementationName : plugin.providedNumberImplementations()) {
-                NumberImplementation implementation = plugin.getNumberImplementation(implementationName);
-                if (implementation.getImplementation().equals(name)) {
+        for(String key : registeredNumberImplementations.keySet()){
+            NumberImplementation implementation = registeredNumberImplementations.get(key);
+            if(implementation.getImplementation() == name) {
                 toReturn = implementation;
-                    break outside;
-                }
+                break;
             }
         }
         cachedInterfaceImplementations.put(name, toReturn);
@@ -225,12 +196,6 @@ public class PluginManager {
             if (disabledPlugins.contains(plugin.getClass().getName())) continue;
             plugin.enable();
         }
-        for (Plugin plugin : plugins) {
-            if (disabledPlugins.contains(plugin.getClass().getName())) continue;
-            allFunctions.addAll(plugin.providedFunctions());
-            allOperators.addAll(plugin.providedOperators());
-            allNumberImplementations.addAll(plugin.providedNumberImplementations());
-        }
         listeners.forEach(e -> e.onLoad(this));
     }
 
@@ -244,14 +209,8 @@ public class PluginManager {
             if (disabledPlugins.contains(plugin.getClass().getName())) continue;
             plugin.disable();
         }
-        cachedFunctions.clear();
-        cachedOperators.clear();
-        cachedNumberImplementations.clear();
         cachedInterfaceImplementations.clear();
         cachedPi.clear();
-        allFunctions.clear();
-        allOperators.clear();
-        allNumberImplementations.clear();
         listeners.forEach(e -> e.onUnload(this));
     }
 
@@ -269,7 +228,7 @@ public class PluginManager {
      * @return the set of all functions that were loaded.
      */
     public Set<String> getAllFunctions() {
-        return allFunctions;
+        return registeredFunctions.keySet();
     }
 
     /**
@@ -278,7 +237,7 @@ public class PluginManager {
      * @return the set of all operators that were loaded.
      */
     public Set<String> getAllOperators() {
-        return allOperators;
+        return registeredOperators.keySet();
     }
 
     /**
@@ -287,7 +246,7 @@ public class PluginManager {
      * @return the set of all implementations that were loaded.
      */
     public Set<String> getAllNumberImplementations() {
-        return allNumberImplementations;
+        return registeredNumberImplementations.keySet();
     }
 
     /**

src/main/java/org/nwapw/abacus/plugin/StandardPlugin.java

@@ -358,7 +358,7 @@ public class StandardPlugin extends Plugin {
 
         @Override
         protected NumberInterface applyInternal(NumberInterface[] params) {
-            NumberInterface pi = getPi(params[0].getClass());
+            NumberInterface pi = piFor(params[0].getClass());
             NumberInterface twoPi = pi.multiply(new NaiveNumber(2).promoteTo(pi.getClass()));
             NumberInterface theta = getSmallAngle(params[0], pi);
             //System.out.println(theta);
@@ -382,7 +382,7 @@ public class StandardPlugin extends Plugin {
 
         @Override
         protected NumberInterface applyInternal(NumberInterface[] params) {
-            return functionSin.apply(getPi(params[0].getClass()).divide(new NaiveNumber(2).promoteTo(params[0].getClass()))
+            return functionSin.apply(piFor(params[0].getClass()).divide(new NaiveNumber(2).promoteTo(params[0].getClass()))
                     .subtract(params[0]));
         }
     };
@@ -439,7 +439,7 @@ public class StandardPlugin extends Plugin {
 
         @Override
         protected NumberInterface applyInternal(NumberInterface[] params) {
-            return functionCos.apply(params[0]).divide(functionCos.apply(params[0]));
+            return functionCos.apply(params[0]).divide(functionSin.apply(params[0]));
         }
     };
 
@@ -531,22 +531,6 @@ public class StandardPlugin extends Plugin {
         return theta;
     }
 
-    public static NumberInterface intPow(NumberInterface number, Class<? extends NumberInterface> numberClass, NumberInterface exponent) {
-        if (exponent.compareTo((new NaiveNumber(0)).promoteTo(numberClass)) == 0) {
-            return (new NaiveNumber(1)).promoteTo(numberClass);
-        }
-        boolean takeReciprocal = exponent.compareTo((new NaiveNumber(0)).promoteTo(numberClass)) < 0;
-        exponent = FUNCTION_ABS.apply(exponent);
-        NumberInterface power = number;
-        for (NumberInterface currentExponent = (new NaiveNumber(1)).promoteTo(numberClass); currentExponent.compareTo(exponent) < 0; currentExponent = currentExponent.add((new NaiveNumber(1)).promoteTo(numberClass))) {
-            power = power.multiply(number);
-        }
-        if (takeReciprocal) {
-            power = (new NaiveNumber(1)).promoteTo(numberClass).divide(power);
-        }
-        return power;
-    }
-
     @Override
     public void onEnable() {
         registerNumberImplementation("naive", IMPLEMENTATION_NAIVE);

src/test/java/org/nwapw/abacus/tests/CalculationTests.java

@@ -0,0 +1,104 @@
+package org.nwapw.abacus.tests;
+
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.nwapw.abacus.Abacus;
+import org.nwapw.abacus.config.Configuration;
+import org.nwapw.abacus.number.NumberInterface;
+import org.nwapw.abacus.plugin.StandardPlugin;
+import org.nwapw.abacus.tree.TreeNode;
+
+public class CalculationTests {
+
+    private static Abacus abacus = new Abacus(new Configuration("precise", new String[]{}));
+
+    @BeforeClass
+    public static void prepareTests(){
+        abacus.getPluginManager().addInstantiated(new StandardPlugin(abacus.getPluginManager()));
+        abacus.getPluginManager().load();
+    }
+
+    private void testOutput(String input, String parseOutput, String output){
+        TreeNode parsedTree = abacus.parseString(input);
+        Assert.assertNotNull(parsedTree);
+        Assert.assertEquals(parsedTree.toString(), parseOutput);
+        NumberInterface result = abacus.evaluateTree(parsedTree);
+        Assert.assertNotNull(result);
+        Assert.assertTrue(result.toString().startsWith(output));
+    }
+
+    private void testEvalError(String input, String parseOutput){
+        TreeNode parsedTree = abacus.parseString(input);
+        Assert.assertNotNull(parsedTree);
+        Assert.assertEquals(parsedTree.toString(), parseOutput);
+        Assert.assertNull(abacus.evaluateTree(parsedTree));
+    }
+
+    @Test
+    public void testAddition(){
+        testOutput("9.5+10", "(9.5+10)", "19.5");
+    }
+
+    @Test
+    public void testSubtraction(){
+        testOutput("9.5-10", "(9.5-10)", "-0.5");
+    }
+
+    @Test
+    public void testMultiplication(){
+        testOutput("9.5*10", "(9.5*10)", "95");
+    }
+
+    @Test
+    public void testDivision(){
+        testOutput("9.5/2", "(9.5/2)", "4.75");
+    }
+
+    @Test
+    public void testNegation(){
+        testOutput("-9.5", "(9.5)`", "-9.5");
+    }
+
+    @Test
+    public void testFactorial(){
+        testOutput("7!", "(7)!", "5040");
+    }
+
+    @Test
+    public void testAbs(){
+        testOutput("abs(-1)", "abs((1)`)", "1");
+        testOutput("abs(1)", "abs(1)", "1");
+    }
+
+    @Test
+    public void testLn(){
+        testEvalError("ln(-1)", "ln((1)`)");
+        testOutput("ln2", "ln(2)", "0.6931471805599453094172321214581765680755");
+    }
+
+    @Test
+    public void testSqrt(){
+        testOutput("sqrt0", "sqrt(0)", "0");
+        testOutput("sqrt4", "sqrt(4)", "2");
+        testOutput("sqrt2", "sqrt(2)", "1.4142135623730950488016887242096980785696");
+    }
+
+    @Test
+    public void testExp(){
+        testOutput("exp0", "exp(0)", "1");
+        testOutput("exp1", "exp(1)", "2.718281828459045235360287471352662497757247");
+        testOutput("exp300", "exp(300)", "19424263952412559365842088360176992193662086");
+        testOutput("exp300", "exp(300)", "19424263952412559365842088360176992193662086");
+    }
+
+    @Test
+    public void testPow(){
+        testOutput("0^2", "(0^2)", "0");
+        testOutput("2^0", "(2^0)", "1");
+        testOutput("2^1", "(2^1)", "2");
+        testOutput("2^-1", "(2^(1)`)", "0.5");
+        testOutput("2^50", "(2^50)", "112589990684262");
+    }
+
+}

src/test/java/org/nwapw/abacus/tests/TokenizerTests.java

@@ -4,6 +4,7 @@ import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.nwapw.abacus.Abacus;
+import org.nwapw.abacus.config.Configuration;
 import org.nwapw.abacus.function.Function;
 import org.nwapw.abacus.function.Operator;
 import org.nwapw.abacus.function.OperatorAssociativity;
@@ -18,7 +19,7 @@ import java.util.List;
 
 public class TokenizerTests {
 
-    private static Abacus abacus = new Abacus();
+    private static Abacus abacus = new Abacus(new Configuration("precise", new String[]{}));
     private static LexerTokenizer lexerTokenizer = new LexerTokenizer();
     private static Function subtractFunction = new Function() {
         @Override