Much testing

src/main/java/de/vanitasvitae/imi/codes/Arguments.java

@@ -3,7 +3,7 @@ package de.vanitasvitae.imi.codes;
 import org.apache.commons.cli.Option;
 import org.apache.commons.cli.Options;
 
-public class Arguments {
+class Arguments {
 
     static final Option STUDY_NUMBER = Option.builder("s")
             .longOpt("study")
@@ -16,20 +16,28 @@ public class Arguments {
     static final Option SAMPLE_TYPE = Option.builder("t")
             .longOpt("type")
             .desc("Type of the sample (b = blood, u = urine)")
-            .required(true)
+            .required()
             .hasArg()
             .argName("sample type")
             .build();
 
+    static final Option NUMBER_CODES = Option.builder("n")
+            .longOpt("number")
+            .desc("Number of codes to be generated")
+            .required()
+            .hasArg()
+            .argName("n")
+            .build();
+
     static final Option OUTPUT_DESTINATION = Option.builder("o")
-            .longOpt("OUTPUT_DESTINATION")
+            .longOpt("output")
             .desc("Filename for the generated html output")
             .hasArg()
             .argName("file name")
             .build();
 
     static final Option EXTERNAL_BROWSER = Option.builder("b")
-            .longOpt("EXTERNAL_BROWSER")
+            .longOpt("browser")
             .desc("Open the generated HTML output in a an external browser")
             .build();
 
@@ -43,14 +51,12 @@ public class Arguments {
      * @return command line options.
      */
     public static Options getCommandLineOptions() {
-        Options options = new Options();
-
-        options.addOption(STUDY_NUMBER);
-        options.addOption(SAMPLE_TYPE);
-        options.addOption(OUTPUT_DESTINATION);
-        options.addOption(EXTERNAL_BROWSER);
-        options.addOption(HELP);
-
-        return options;
+        return new Options()
+                .addOption(STUDY_NUMBER)
+                .addOption(SAMPLE_TYPE)
+                .addOption(NUMBER_CODES)
+                .addOption(OUTPUT_DESTINATION)
+                .addOption(EXTERNAL_BROWSER)
+                .addOption(HELP);
     }
 }

src/main/java/de/vanitasvitae/imi/codes/InputValidator.java

@@ -5,7 +5,7 @@ import java.util.regex.Pattern;
 public class InputValidator {
 
     // Allowed characters
-    private static final String ALPHABET = "[a-zA-Z0-9]";
+    public static final String ALPHABET = "[a-zA-Z0-9]";
 
     /*
     REGEX pattern for study numbers. Allowed are all 3-letter numbers from the alphabet [a-zA-Z0-9].
@@ -22,11 +22,12 @@ public class InputValidator {
      *
      * @param in input String
      * @return unmodified input String if it matches.
-     * @throws IllegalArgumentException if the input String doesn't match the regex.
+     *
+     * @throws InvalidOptionException if the input String doesn't match the regex.
      */
-    public static String validateStudyNumber(String in) {
+    public static String validateStudyNumber(String in) throws InvalidOptionException {
         if (!STUDY_NUMBER_MATCHER.matcher(in).matches()) {
-            throw new IllegalArgumentException("Study number does not match REGEX.");
+            throw new InvalidOptionException("Study number must be a three digit number from the alphabet [a-zA-Z0-9].");
         }
 
         return in;
@@ -38,10 +39,38 @@ public class InputValidator {
      * @param in input String
      * @return parsed {@link SampleType}.
      *
-     * @throws IllegalArgumentException if the given String doesn't match a {@link SampleType}.
+     * @throws InvalidOptionException if the given String doesn't match a {@link SampleType}.
      * @throws NullPointerException in case the given String is {@code null}.
      */
-    public static SampleType validateSampleType(String in) {
-        return SampleType.valueOf(in);
+    public static SampleType validateSampleType(String in) throws InvalidOptionException {
+        try {
+            return SampleType.getEnum(in);
+        } catch (IllegalArgumentException e) {
+            String message = "Invalid sample type \"" + in + "\".";
+            throw new InvalidOptionException(message, e);
+        }
+    }
+
+    /**
+     * Validate, that the user provided number of codes to be generated is an integer greater than 0.
+     *
+     * @param in input String
+     * @return number of codes to be generated.
+     *
+     * @throws InvalidOptionException in case the input string is
+     */
+    public static int validateNumberOfCodes(String in) throws InvalidOptionException {
+        int i;
+        try {
+            i = Integer.parseInt(in);
+        } catch (NumberFormatException e) {
+            throw new InvalidOptionException("Invalid input \"" + in + "\". Please enter a positive number.", e);
+        }
+
+        if (i <= 0) {
+            throw new InvalidOptionException("Number of generated codes must be greater than 0.");
+        }
+
+        return i;
     }
 }

src/main/java/de/vanitasvitae/imi/codes/InvalidOptionException.java

@@ -0,0 +1,28 @@
+package de.vanitasvitae.imi.codes;
+
+/**
+ * Exception which gets thrown when the user-provided input arguments are not valid.
+ */
+public class InvalidOptionException extends Exception {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * Create a new {@link InvalidOptionException}. The message MUST be human readable, as it will get printed to the
+     * CLI.
+     * @param message human readable error message.
+     */
+    public InvalidOptionException(String message) {
+        super(message);
+    }
+
+    /**
+     * Create a new {@link InvalidOptionException}. The message MUST be human readable, as it will get printed to the
+     * CLI.
+     * @param message human readable error message.
+     * @param cause cause of the exception.
+     */
+    public InvalidOptionException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

src/main/java/de/vanitasvitae/imi/codes/Main.java

@@ -14,7 +14,6 @@ public class Main {
     private static final String HELP_FOOTER = "\nAuthor: Paul Schaub <paul.schaub@wwu.de>";
 
     public static void main(String[] args) {
-
         Options options = Arguments.getCommandLineOptions();
         CommandLineParser parser = new DefaultParser();
 
@@ -27,6 +26,7 @@ public class Main {
             return;
         }
 
+        // User issues '-h', so just show help text and exit.
         if (arguments.hasOption(Arguments.HELP)) {
             printHelp(options);
             return;

src/main/java/de/vanitasvitae/imi/codes/SampleType.java

@@ -2,19 +2,61 @@ package de.vanitasvitae.imi.codes;
 
 public enum SampleType {
 
-    b("Blood"),
-    u("Urine"),
+    // Hard coded values. Prepended with an underscore to allow numeric values (eg. _2).
+    _b('b', "Blood"),
+    _u('u', "Urine"),
     ;
 
     // Members of the enum
 
-    private final String name;
+    private final char name;
+    private final String description;
 
-    SampleType(String name) {
+    /**
+     * Create a SampleType enum which is described by a name (one letter from the alphabet [a-zA-Z0-9]) and a
+     * human readable description.
+     *
+     * @param name one letter name
+     * @param description description
+     */
+    SampleType(char name, String description) {
         this.name = name;
+        this.description = description;
     }
 
-    public String getName() {
-        return name;
+    /**
+     * Override {@link Enum#toString()} in order to return the name of the enum instead of its value.
+     *
+     * @return name
+     */
+    @Override
+    public String toString() {
+        return "" + name;
+    }
+
+    /**
+     * Return the human readable description of the enum.
+     */
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * Replacement method for {@link #valueOf(String)}. You MUST use this method instead, as we have to escape
+     * the names of the enums with a underscore in order to allow for numerals to be used as enum name (for example "_0").
+     * This method takes a string value (eg. "u") and returns the corresponding enum ("_u").
+     *
+     * @param name name of the enum without an underscore.
+     * @return enum corresponding to the name.
+     *
+     * @throws IllegalArgumentException if no matching enum was found.
+     */
+    public static SampleType getEnum(String name) {
+        for (SampleType s : SampleType.values()) {
+            if (s.toString().equals(name)) {
+                return s;
+            }
+        }
+        throw new IllegalArgumentException("No SampleType found for name \"" + name + "\".");
     }
 }

src/test/java/de/vanitasvitae/imi/codes/InputValidatorTest.java

@@ -0,0 +1,164 @@
+package de.vanitasvitae.imi.codes;
+
+import static junit.framework.TestCase.assertEquals;
+
+import java.util.Random;
+
+import org.junit.Test;
+
+public class InputValidatorTest {
+
+    private static final Random RAND = new Random();
+
+    private static final String ALPHABET = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+
+    /**
+     * Test, whether {@link InputValidator#validateStudyNumber(String)} accepts 3 digit inputs from the allowed alphabet.
+     *
+     * @throws InvalidOptionException NOT expected.
+     */
+    @Test
+    public void testValidateStudyNumber() throws InvalidOptionException {
+        String in = generateTestStringOfLength(3);
+        assertEquals("validateStudyNumber must accept valid three digit inputs from the alphabet [a-zA-Z0-9].",
+                in, InputValidator.validateStudyNumber(in));
+    }
+
+    /**
+     * Test, whether {@link InputValidator#validateStudyNumber(String)} fails for inputs of correct length, but from
+     * illegal characters.
+     *
+     * @throws InvalidOptionException expected
+     */
+    @Test(expected = InvalidOptionException.class)
+    public void testValidateStudyNumberFailsForInvalidAlphabet() throws InvalidOptionException {
+        String in = "7*A";
+
+        // -> InvalidOptionException
+        InputValidator.validateStudyNumber(in);
+    }
+
+    /**
+     * Test, whether {@link InputValidator#validateStudyNumber(String)} fails for Strings of length 0, 1 or two from
+     * the allowed alphabet.
+     *
+     * @throws InvalidOptionException expected.
+     */
+    @Test(expected = InvalidOptionException.class)
+    public void testValidateStudyNumberFailsForInputOfInsufficientLength() throws InvalidOptionException {
+        String in = generateTestStringOfLength(RAND.nextInt(3));
+
+        // -> InvalidOptionException
+        InputValidator.validateStudyNumber(in);
+    }
+
+    /**
+     * Test, whether {@link InputValidator#validateStudyNumber(String)} fails for input Strings which are too long.
+     *
+     * @throws InvalidOptionException expected.
+     */
+    @Test(expected = InvalidOptionException.class)
+    public void testValidateStudyNumberFailsForLongerInput() throws InvalidOptionException {
+        String in = generateTestStringOfLength(RAND.nextInt(50) + 4);
+
+        // -> InvalidOptionException
+        InputValidator.validateStudyNumber(in);
+    }
+
+    /*
+    Generates a String of length len which consists of letters from the alphabet [a-zA-Z0-9].
+     */
+    private static String generateTestStringOfLength(int len) {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < len; i++) {
+            sb.append(ALPHABET.charAt(RAND.nextInt(ALPHABET.length())));
+        }
+
+        return sb.toString();
+    }
+
+    /**
+     * Test, whether {@link InputValidator#validateSampleType(String)} returns the expected {@link SampleType} for
+     * given input strings.
+     *
+     * @throws InvalidOptionException NOT expected
+     */
+    @Test
+    public void testValidateSampleType() throws InvalidOptionException {
+        for (SampleType t : SampleType.values()) {
+            assertEquals("validateSampleType didn't return expected value for input \"" + t.toString() + "\"",
+                    t, InputValidator.validateSampleType(t.toString()));
+        }
+    }
+
+    /**
+     * Test, whether {@link InputValidator#validateSampleType(String)} throws a {@link InvalidOptionException} for
+     * unknown sample types (in this case {@code x}).
+     *
+     * @throws InvalidOptionException expected
+     */
+    @Test(expected = InvalidOptionException.class)
+    public void testValidateSampleTypeFailsForUnknownInputs() throws InvalidOptionException {
+        // -> InvalidOptionException
+        InputValidator.validateSampleType("x");
+    }
+
+    /**
+     * Test, whether {@link InputValidator#validateNumberOfCodes(String)} returns the expected {@link Integer}.
+     * In this method, posit
+     *
+     * @throws InvalidOptionException NOT expected
+     */
+    @Test
+    public void testValidateNumberOfCodes() throws InvalidOptionException {
+        // nextInt(bounds) returns a number between 0 (inclusive) and bound (exclusive), so +1 should be safe.
+        int number = RAND.nextInt(Integer.MAX_VALUE) + 1;
+        String string = Integer.toString(number);
+
+        assertEquals("validateNumberOfCodes failed to validate input \"" + string + "\"",
+                number, InputValidator.validateNumberOfCodes(string));
+    }
+
+    /**
+     * Test, whether {@link InputValidator#validateNumberOfCodes(String)} throws a {@link InvalidOptionException}
+     * for negative numbers and 0.
+     *
+     * @throws InvalidOptionException expected
+     */
+    @Test(expected = InvalidOptionException.class)
+    public void testValidateNumberOfCodesFailsForNegativeNumbers() throws InvalidOptionException {
+        int number = -RAND.nextInt(Integer.MAX_VALUE);
+        String string = Integer.toString(number);
+
+        // -> InvalidOptionException
+        InputValidator.validateNumberOfCodes(string);
+    }
+
+    /**
+     * Test, whether {@link InputValidator#validateNumberOfCodes(String)} throws a {@link InvalidOptionException}
+     * for non-numeric inputs, which cannot be parsed into an {@link Integer}.
+     *
+     * @throws InvalidOptionException expected
+     */
+     @Test(expected = InvalidOptionException.class)
+    public void testValidateNumberOfCodesFailsForNonNumericInput() throws InvalidOptionException {
+        String string = "notNumeric";
+
+        // -> InvalidOptionException
+        InputValidator.validateNumberOfCodes(string);
+    }
+
+    /**
+     * Test, whether {@link InputValidator#validateNumberOfCodes(String)} throws a {@link InvalidOptionException}
+     * for inputs that exceed the range of an {@link Integer} ({@link Integer#MAX_VALUE}).
+     *
+     * @throws InvalidOptionException expected
+     */
+    @Test(expected = InvalidOptionException.class)
+    public void testValidateNumberOfCodesFailsForNumbersTooLarge() throws InvalidOptionException {
+        // 10 * Integer.MAX_VALUE
+        String string = "21474836470";
+
+        InputValidator.validateNumberOfCodes(string);
+    }
+}

src/test/java/de/vanitasvitae/imi/codes/SampleTypeTest.java

@@ -0,0 +1,39 @@
+package de.vanitasvitae.imi.codes;
+
+import static junit.framework.TestCase.assertEquals;
+import static junit.framework.TestCase.assertTrue;
+
+import java.util.regex.Pattern;
+
+import org.junit.Test;
+
+/**
+ * Test functionality of the {@link SampleType} enum.
+ */
+public class SampleTypeTest {
+
+    private static final Pattern SAMPLE_TYPE_VALUE_PATTERN = Pattern.compile(InputValidator.ALPHABET);
+
+    /**
+     * Test, whether all {@link SampleType} names are of length 1 and from the alphabet [a-zA-Z0-9].
+     */
+    @Test
+    public void testSampleTypeNames() {
+        for (SampleType t : SampleType.values()) {
+            assertTrue("SampleType value names must be one letter from the alphabet [a-zA-Z0-9].",
+                    SAMPLE_TYPE_VALUE_PATTERN.matcher(t.toString()).matches());
+        }
+    }
+
+    /**
+     * Test, whether {@link SampleType#getEnum(String)} correctly maps {@link SampleType#name} to the corresponding
+     * values.
+     */
+    @Test
+    public void testGetEnum() {
+        for (SampleType t : SampleType.values()) {
+            assertEquals("getEnum must return the SampleType, which corresponds to the given name.",
+                    t, SampleType.getEnum(t.toString()));
+        }
+    }
+}