PHP: ensure 5.3 compatibility, refactor timezone utilities

Relates to #250

Modifications
 - supported version
   - bump required version from 5.1.0 to 5.3.x
   - update README
   - add PHP 5.3 to Travis environments
 - rewrite array declarations: explicitely use array() instead of []
 - move checkPHPVersion to application/Utils.php
 - move timezone functions to application/TimeZone.php
   - cleanup code
   - improve test coverage

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

1 files changed, 83 insertions, 0 deletions

diff --git a/tests/TimeZoneTest.php b/tests/TimeZoneTest.php
new file mode 100644
index 00000000..f3de3913
--- /dev/null
+++ b/tests/TimeZoneTest.php
@@ -0,0 +1,83 @@
+<?php
+/**
+ * TimeZone's tests
+ */
+
+require_once 'application/TimeZone.php';
+
+/**
+ * Unitary tests for timezone utilities
+ */
+class TimeZoneTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * Generate a timezone selection form
+     */
+    public function testGenerateTimeZoneForm()
+    {
+        $generated = generateTimeZoneForm();
+
+        // HTML form
+        $this->assertStringStartsWith('Continent:<select', $generated[0]);
+        $this->assertContains('selected="selected"', $generated[0]);
+        $this->assertStringEndsWith('</select><br />', $generated[0]);
+
+        // Javascript handler
+        $this->assertStringStartsWith('<script>', $generated[1]);
+        $this->assertContains(
+            '<option value=\"Bermuda\">Bermuda<\/option>',
+            $generated[1]
+        );
+        $this->assertStringEndsWith('</script>', $generated[1]);
+    }
+
+    /**
+     * Generate a timezone selection form, with a preselected timezone
+     */
+    public function testGenerateTimeZoneFormPreselected()
+    {
+        $generated = generateTimeZoneForm('Antarctica/Syowa');
+
+        // HTML form
+        $this->assertStringStartsWith('Continent:<select', $generated[0]);
+        $this->assertContains(
+            'value="Antarctica" selected="selected"',
+            $generated[0]
+        );
+        $this->assertContains(
+            'value="Syowa" selected="selected"',
+            $generated[0]
+        );
+        $this->assertStringEndsWith('</select><br />', $generated[0]);
+
+
+        // Javascript handler
+        $this->assertStringStartsWith('<script>', $generated[1]);
+        $this->assertContains(
+            '<option value=\"Bermuda\">Bermuda<\/option>',
+            $generated[1]
+        );
+        $this->assertStringEndsWith('</script>', $generated[1]);
+    }
+
+    /**
+     * Check valid timezones
+     */
+    public function testValidTimeZone()
+    {
+        $this->assertTrue(isTimeZoneValid('America', 'Argentina/Ushuaia'));
+        $this->assertTrue(isTimeZoneValid('Europe', 'Oslo'));
+        $this->assertTrue(isTimeZoneValid('UTC', 'UTC'));
+    }
+
+    /**
+     * Check invalid timezones
+     */
+    public function testInvalidTimeZone()
+    {
+        $this->assertFalse(isTimeZoneValid('CEST', 'CEST'));
+        $this->assertFalse(isTimeZoneValid('Europe', 'Atlantis'));
+        $this->assertFalse(isTimeZoneValid('Middle_Earth', 'Moria'));
+    }
+}
+?>