Implemented category and priority setters in libpit. Started writing unit tests.

libpit/test/com/jdbernard/pit/IssueTest.groovy

@@ -0,0 +1,65 @@
+package com.jdbernard.pit
+
+class IssueTest
+
+    def issues
+    File testDir
+
+    @Before void makeIssueFiles() {
+        File issueFile
+        issues = []
+
+        testDir = new File('testdir')
+        testDir.mkdirs()
+
+        issueFile = new File(testDir, '0001f1.rst')
+        issueFile.write(
+            "Add the killer feature to the killer app.\n" +
+            "=========================================\n\n" +
+            "Make our killer app shine!.")
+        issues << new Issue(issueFile)
+
+        issueFile = new File(testDir, '0002t5.rst')
+        issueFile.write(
+            "Obtain donuts.\n" +
+            "==============\n\n" +
+            "The office is seriously lacking in sugary donuts.\n\n
+            "We must rectify this at once!")
+        issues << new Issue(issueFile)
+    }
+
+    @AfterClass void deleteIssueFiles() {
+        testDir.deleteDir()
+    }
+
+    @Test void testSetCategory() {
+        
+        assert issues[0].category == Category.FEATURE
+        assert issues[1].category == Category.TASK
+
+        issues[0].category == Category.CLOSED
+        issues[1].category == Category.TASK
+
+        assert issues[0].category == Category.CLOSED
+        assert issues[1].category == Category.BUG
+
+        assert new File(testDir, '0001c1.rst').exists()
+        assert new File(testDir, '0002b5.rst').exists()
+        assertFalse new File(testDir, '0001f1.rst').exists()
+        assertFalse new File(testDir, '0002t5.rst').exists()
+    }
+
+    @Test void testIssueConstructor() {
+        File issueFile = new File(testDir, '0001f1.rst')
+        Issue issue = new Issue(issueFile)
+
+        assert issue.id == "0001"
+        assert issue.category == Category.FEATURE
+        assert issue.priority == 1
+        assert issue.title == "Add the killer feature to the killer app."
+        assert issue.text == "Add the killer feature to the killer app.\n" +
+                             "=========================================\n\n" +
+                             "Make our killer app shine!."
+        assert issue.source == issueFile
+    }
+}