PAN-64 Completed and refactored unit tests for ParserService.

services/src/test/java/edu/msudenver/tsp/services/parser/ParserServiceTest.java

@@ -9,20 +9,210 @@ import org.mockito.runners.MockitoJUnitRunner;
 import java.util.ArrayList;
 import java.util.List;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.*;
 import static org.mockito.Matchers.anyString;
-import static org.mockito.Mockito.when;
+import static org.mockito.Mockito.*;
 
 @RunWith(MockitoJUnitRunner.class)
 public class ParserServiceTest {
 
     @Mock private ParserService mockParserService;
-
     @InjectMocks private ParserService parserService;
 
     @Test
-    public void testEmptyStringEqualsEmptyString() {
+    public void testParseUserInput_noErrors() {
+        final String userInput = "string";
+        final Node root = new Node(userInput, null);
+
+        final ParserService parse = mock(ParserService.class);
+        when(parse.parseRawInput(anyString())).thenReturn(root);
+        when(parse.retrieveStatements(root)).thenReturn(new ArrayList<>());
+        when(parse.parseUserInput(userInput)).thenCallRealMethod();
+
+        assertTrue(parserService.parseUserInput(userInput));
+    }
+
+    @Test
+    public void testParseUserInput_thrownError() {
+        final String userInput = "string";
+        final Node root = new Node(userInput, null);
+        final Exception error = new NullPointerException();
+
+        final ParserService parse = mock(ParserService.class);
+        when(parse.parseRawInput(anyString())).thenReturn(root);
+        when(parse.retrieveStatements(root)).thenThrow(error);
+        when(parse.parseUserInput(userInput)).thenCallRealMethod();
+
+        assertFalse(parse.parseUserInput(userInput));
+    }
+
+    @Test
+    public void testRecurse_NullNode() {
+        parserService.recurse(null);
+    }
+
+    @Test
+    public void testRecurse_StatementContainsLet() {
+        final String statement = "let";
+        final Node test = new Node(statement, null);
+
+        final ParserService spy = spy(new ParserService());
+        doNothing().when(spy).separateByLet(test, statement);
+
+        spy.recurse(test);
+    }
+
+    @Test
+    public void testRecurse_StatementContainsIf() {
+        final String statement = "if";
+        final Node test = new Node(statement, null);
+
+        final ParserService spy = spy(new ParserService());
+        doNothing().when(spy).separateByIf(test, statement);
+
+        spy.recurse(test);
+    }
+
+    @Test
+    public void testRecurse_StatementContainsThen() {
+        final String statement = "then";
+        final Node test = new Node(statement, null);
+
+        final ParserService spy = spy(new ParserService());
+        doNothing().when(spy).separateByThen(test, statement);
+
+        spy.recurse(test);
+    }
+
+    @Test
+    public void testSeparateByLet_StatementContainsOnlyLet() {
+        final String statement = "let x be even";
+        final Node test = new Node(statement, null);
+
+        final ParserService spy = spy(new ParserService());
+        doNothing().when(spy).recurse(anyObject());
+        spy.separateByLet(test, statement);
+
+        final String keywordLet = test.getLeft().getStatement();
+        assertEquals("let\n", keywordLet);
+
+        final String restOfIt = test.getLeft().getCenter().getStatement();
+        assertEquals(" x be even\n", restOfIt);
+    }
+
+    @Test
+    public void testSeparateByLet_StatementContainsLetIf() {
+        final String statement = "let x be even. if x is prime then x is 2.";
+        final Node test = new Node(statement, null);
+
+        final ParserService spy = spy(new ParserService());
+        doNothing().when(spy).recurse(anyObject());
+        spy.separateByLet(test, statement);
+
+        final String keywordLet = test.getLeft().getStatement();
+        assertEquals("let\n", keywordLet);
+
+        final String restOfIt = test.getLeft().getCenter().getStatement();
+        assertEquals(" x be even. \n", restOfIt);
+    }
+
+    @Test
+    public void testSeparateByLet_StatementContainsLetThen() {
+        final String statement = "let x be an even prime. then x is 2.";
+        final Node test = new Node(statement, null);
+
+        final ParserService spy = spy(new ParserService());
+        doNothing().when(spy).recurse(anyObject());
+        spy.separateByLet(test, statement);
+
+        final String keywordLet = test.getLeft().getStatement();
+        assertEquals("let\n", keywordLet);
+
+        final String restOfIt = test.getLeft().getCenter().getStatement();
+        assertEquals(" x be an even prime. \n", restOfIt);
+    }
+
+    @Test
+    public void testSeparateByIf_StatementContainsOnlyIf() {
+        final String statement = "if x is even";
+        final Node test = new Node(statement, null);
+
+        final ParserService spy = spy(new ParserService());
+        doNothing().when(spy).recurse(anyObject());
+        spy.separateByIf(test, statement);
+
+        final String keywordIf = test.getCenter().getStatement();
+        assertEquals("if\n", keywordIf);
+
+        final String restOfIt = test.getCenter().getCenter().getStatement();
+        assertEquals(" x is even\n", restOfIt);
+    }
+
+    @Test
+    public void testSeparateByIf_StatementContainsThen() {
+        final String statement = "if x is even then x^2 is even";
+        final Node test = new Node(statement, null);
+
+        final ParserService spy = spy(new ParserService());
+        doNothing().when(spy).recurse(anyObject());
+        spy.separateByIf(test, statement);
+
+        final String keywordIf = test.getCenter().getStatement();
+        assertEquals("if\n", keywordIf);
+
+        final String restOfIt = test.getCenter().getCenter().getStatement();
+        assertEquals(" x is even \n", restOfIt);
+    }
+
+    @Test
+    public void testSeparateByThen_StatementContainsOnlyThen() {
+        final String statement = "then x^2 is even";
+        final Node test = new Node(statement, null);
+
+        final ParserService spy = spy(new ParserService());
+        doNothing().when(spy).recurse(anyObject());
+        spy.separateByThen(test, statement);
+
+        final String keywordThen = test.getRight().getStatement();
+        assertEquals("then\n", keywordThen);
+
+        final String restOfIt = test.getRight().getCenter().getStatement();
+        assertEquals(" x^2 is even\n", restOfIt);
+    }
+
+    @Test
+    public void testPopulateStatementList_NodeIsNull(){
+        final ArrayList<String> list = new ArrayList<>();
+        final ArrayList<String> result = (ArrayList)parserService.populateStatementList(null, list);
+
+        assertEquals(list, result);
+    }
+
+    @Test
+    public void testPopulateStatementList_NodeExists(){
+        final ArrayList<String> list = new ArrayList<>();
+        final String statement = "this is a statement   ";
+        final Node input = new Node(statement, null);
+
+        final ArrayList<String> result = (ArrayList)parserService.populateStatementList(input, list);
+
+        assertTrue(result.contains("this is a statement"));
+    }
+
+    @Test
+    public void testParseRawInput_EmptyString() {
+        final String expected = "0: \n";
+        final String actual;
+
+        when(parserService.parseRawInput("")).thenReturn(new Node("", null));
+
+        actual = parserService.parseRawInput("").toString();
+
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void testParseRawInputAndRecurse_EmptyStringEqualsEmptyString() {
         final String expected = "0: \n";
         final String actual = parserService.parseRawInput("").toString();
 
@@ -30,7 +220,7 @@ public class ParserServiceTest {
     }
 
     @Test
-    public void testUselessStringEqualsUselessString() {
+    public void testParseRawInput_UselessStringEqualsUselessString() {
         final String expected = "0: cat\n";
         final String actual = parserService.parseRawInput("cat").toString();
 
@@ -38,7 +228,7 @@ public class ParserServiceTest {
     }
 
     @Test
-    public void testSingleIfReturnsIfPlusEmptyString() {
+    public void testParseRawInput_SingleIfReturnsIfPlusEmptyString() {
         final String expected = "0: if\n... 1: if\n... 2: \n\n";
         final String actual = parserService.parseRawInput("if").toString();
 
@@ -46,7 +236,7 @@ public class ParserServiceTest {
     }
 
     @Test
-    public void testBaseCaseIfXIsEvenThenXSquaredIsEven() {
+    public void testParseRawInput_BaseCaseIfXIsEvenThenXSquaredIsEven() {
         final String expected = "0: if x is even then x^2 is even\n" +
                 "... 1: if\n" +
                 "... 2:  x is even \n" +
@@ -59,7 +249,7 @@ public class ParserServiceTest {
     }
 
     @Test
-    public void testLetXBeEvenThenXSquaredIsEven() {
+    public void testParseRawInput_LetXBeEvenThenXSquaredIsEven() {
         final String expected = "0: let x be even. then x^2 is even.\n" +
                 "... 1: let\n" +
                 "... 2:  x be even. \n" +
@@ -72,7 +262,7 @@ public class ParserServiceTest {
     }
 
     @Test
-    public void testLetIfThen() {
+    public void testParseRawInput_LetIfThen() {
         final String expected = "0: let a. if b, then c.\n" +
                 "... 1: let\n" +
                 "... 2:  a. \n" +
@@ -87,7 +277,7 @@ public class ParserServiceTest {
     }
 
     @Test
-    public void testLetStatementWithoutAnyIfOrThenStatements() {
+    public void testParseRawInput_LetStatementWithoutAnyIfOrThenStatements() {
         final String expected = "0: let a be equal to b.\n" +
                 "... 1: let\n" +
                 "... 2:  a be equal to b.\n\n";
@@ -98,7 +288,7 @@ public class ParserServiceTest {
     }
 
     @Test
-    public void testEmptyStringReturnsEmptyList() {
+    public void testRetrieveStatements_EmptyStringReturnsEmptyList() {
         final List<String> expectedList = new ArrayList<>();
         expectedList.add("");
 
@@ -109,7 +299,7 @@ public class ParserServiceTest {
     }
 
     @Test
-    public void testBaseCaseReturnsXIsEven() {
+    public void testRetrieveStatements_BaseCaseReturnsXIsEven() {
         final List<String> expectedList = new ArrayList<>();
         expectedList.add("x is even");
         expectedList.add("x^2 is even");