Fix scanning for static variables near start of file (#274)

* Add test for variable at start of file

* Allow looking for previous static statements at start of file

Author: sirbrillig

Tests/VariableAnalysisSniff/GlobalScopeTest.php

@@ -18,10 +18,11 @@ public function testGlobalScopeWarnings()
 		$phpcsFile->process();
 		$lines = $this->getWarningLineNumbersFromFile($phpcsFile);
 		$expectedErrors = [
-			4,
-			7,
-			10,
-			13,
+			3,
+			5,
+			8,
+			11,
+			14,
 		];
 		$this->assertSame($expectedErrors, $lines);
 	}
@@ -38,9 +39,10 @@ public function testGlobalScopeWarningsWithAllowUndefinedVariablesInFileScope()
 		$phpcsFile->process();
 		$lines = $this->getWarningLineNumbersFromFile($phpcsFile);
 		$expectedErrors = [
-			4,
-			10,
-			13,
+			3,
+			5,
+			11,
+			14,
 		];
 		$this->assertSame($expectedErrors, $lines);
 	}
@@ -57,8 +59,9 @@ public function testGlobalScopeWarningsWithAllowUnusedVariablesInFileScope()
 		$phpcsFile->process();
 		$lines = $this->getWarningLineNumbersFromFile($phpcsFile);
 		$expectedErrors = [
-			7,
-			10,
+			3,
+			8,
+			11,
 		];
 		$this->assertSame($expectedErrors, $lines);
 	}

Tests/VariableAnalysisSniff/fixtures/GlobalScopeFixture.php

@@ -1,5 +1,6 @@
 <?php
 
+$post = $data['post']; // Undefined variable $data, unused variable $post
 $name = 'friend';
 $place = 'faerie'; // unused variable $place
 

VariableAnalysis/Sniffs/CodeAnalysis/VariableAnalysisSniff.php

@@ -1316,8 +1316,7 @@ protected function processVariableAsStaticDeclaration(File $phpcsFile, $stackPtr
 		$startOfStatement = $phpcsFile->findPrevious([T_SEMICOLON, T_OPEN_CURLY_BRACKET], $stackPtr - 1, null, false, null, true);
 		$staticPtr = $phpcsFile->findPrevious([T_STATIC], $stackPtr - 1, null, false, null, true);
 		if (! is_int($startOfStatement)) {
-			$line = $tokens[$stackPtr]['line'];
-			throw new \Exception("Could not find start of statement on line {$line}");
+			$startOfStatement = 1;
 		}
 		if (! is_int($staticPtr)) {
 			return false;