// Subjects the SimpleParser class to a series of tests, returning True if it passes.
public static bool ExecuteUnitTest()
{
// Note that the collection of tests below is NOT exhaustive, but they do give an
// indication of the basic functionality of the SimpleParser class. They should be
// helpful in validating after any future code refactoring (e.g. SimpleParser could
// be rewritten to use exclusively base-1 indexing internally, and this test might
// assist in verifying the various +1's and -1's were tacked on correctly.
// Some of these tests may be repetitive.. I added things in several times without
// checking to see if they superceeded parts that were already written.
// But hey, it's not like we need to worry about having *too many* tests here!
SimpleParser p = default(SimpleParser);
bool caught = false;
UTO("TESTING THE SIMPLEPARSER CLASS ---");
UTO("Testing constructors...");
p = new SimpleParser();
if (p.Text != "" || p.Cursor != 0)
{
return(false);
}
p = new SimpleParser("Hello");
if (p.Text != "Hello" || p.Cursor != 0)
{
return(false);
}
UTO("Passed" + Environment.NewLine);
UTO("Testing basic functionality...");
p.Text = "abCdeFghijklmnop123aa1123";
if (p.Extract("C", "F") != "de")
{
return(false);
}
if (p.Cursor != 6)
{
return(false);
}
p.SeekNext("i");
if (p.Cursor != 9)
{
return(false);
}
p.SeekPrev("F");
if (p.Cursor != 5)
{
return(false);
}
if (p.Peek("f", "i") != "gh")
{
return(false);
}
if (p.Cursor != 5)
{
return(false);
}
if (p.SeekAndExtract("123", "1", "3") != "12")
{
return(false);
}
if (p.Cursor != 25)
{
return(false);
}
if (p.TrySeekPrev("Z"))
{
return(false);
}
if (p.Cursor != 25)
{
return(false);
}
// Some testing of SeekPrev on the right bound
p.Cursor = p.Text.Length;
if (!p.TrySeekPrev("3"))
{
return(false);
}
if (p.Cursor != p.Text.Length - 1)
{
return(false);
}
p.Text += "Y";
p.Cursor = p.Text.Length;
if (!p.TrySeekPrev("Y"))
{
return(false);
}
if (p.Cursor != p.Text.Length - 1)
{
return(false);
}
// Testing of small string
p.Text = "A";
if (!p.TrySeekNext("A"))
{
return(false);
}
if (!p.TrySeekPrev("A"))
{
return(false);
}
UTO("Passed" + Environment.NewLine);
UTO("Testing case insensitivity...");
p.Text = "abc123CdeFghi";
p.CaseSensitive = true;
if (p.Extract("C", "F") != "de")
{
return(false);
}
p.CaseSensitive = false;
p.Cursor = 0;
if (p.Extract("C", "F") != "123Cde")
{
return(false);
}
UTO("Passed" + Environment.NewLine);
UTO("Testing cursor property edges...");
p.Text = "abcdef";
p.Cursor = 0;
p.Cursor = p.Text.Length - 1;
if (p.TryExtract("a", "b") != "")
{
return(false);
}
if (p.Cursor != p.Text.Length - 1)
{
return(false);
}
p.Cursor += 1; // cursor is allowed to be to the right of the last character
UTO("Passed" + Environment.NewLine);
UTO("Testing cursor right edge exception...");
p.Text = "abcdef";
caught = false;
try {
p.Cursor = p.Text.Length + 1;
}
catch (ArgumentOutOfRangeException) {
caught = true;
}
if (!caught)
{
return(false);
}
UTO("Passed" + Environment.NewLine);
UTO("Testing cursor left edge exception...");
p.Text = "abcdef";
caught = false;
try {
p.Cursor = -1;
}
catch (ArgumentOutOfRangeException) {
caught = true;
}
if (!caught)
{
return(false);
}
UTO("Passed" + Environment.NewLine);
UTO("Testing that SeekNext generates exception if called when cursor is at right edge of text...");
p.Text = "abc";
p.Cursor = 3;
caught = false;
try {
p.SeekNext("a");
}
catch (SimpleParser.SymbolNotFoundException) {
caught = true;
}
if (!caught)
{
return(false);
}
// Now make sure it doesn't throw and exception using the other method
p.Cursor = 3;
caught = false;
try {
if (p.TrySeekNext("a") != false)
{
return(false);
}
}
catch (SimpleParser.SymbolNotFoundException) {
caught = true;
}
if (caught)
{
return(false);
}
UTO("Passed" + Environment.NewLine);
UTO("Testing that SeekPrev generates exception if called when cursor is at left edge of text...");
p.Text = "abc";
p.Cursor = 0;
caught = false;
try {
p.SeekPrev("a");
}
catch (SimpleParser.SymbolNotFoundException) {
caught = true;
}
if (!caught)
{
return(false);
}
// Now make sure it doesn't throw and exception using the other method
p.Cursor = 0;
caught = false;
try {
if (p.TrySeekPrev("a") != false)
{
return(false);
}
}
catch (SimpleParser.SymbolNotFoundException) {
caught = true;
}
if (caught)
{
return(false);
}
UTO("Passed" + Environment.NewLine);
UTO("Testing extraction with zero-length arguments...");
p.Text = "abc";
p.Cursor = 0;
if (p.Extract("", "a") != "")
{
return(false);
}
p.Cursor = 0;
if (p.Extract("", "abc") != "")
{
return(false);
}
p.Cursor = 0;
if (p.Extract("", "b") != "a")
{
return(false);
}
p.Cursor = 0;
if (p.Extract("", "c") != "ab")
{
return(false);
}
p.Cursor = 0;
if (p.Extract("", "") != "abc")
{
return(false);
}
p.Text = "";
if (p.Extract("", "") != "")
{
return(false);
}
p.Cursor = 0;
if (p.CanExtract("a", ""))
{
return(false);
}
UTO("Passed" + Environment.NewLine);
UTO("ALL TESTS PASSED!");
return(true);
}