Implement DeleteQuery

closes #5

src/Query/DeleteQuery.php

@@ -0,0 +1,38 @@
+<?php
+namespace Gt\SqlBuilder\Query;
+
+class DeleteQuery extends SqlQuery {
+	public function __toString():string {
+		$query = $this->processClauseList([
+			self::PRE_QUERY_COMMENT => $this->preQuery(),
+			"delete from" => $this->from(),
+			"partition" => $this->partition(),
+			"where" => $this->where(),
+			"order by" => $this->orderBy(),
+			"limit" => $this->limit(),
+			self::POST_QUERY_COMMENT => $this->postQuery(),
+		]);
+
+		return $query;
+	}
+
+	public function from():array {
+		return [];
+	}
+
+	public function partition():array {
+		return [];
+	}
+
+	public function where():array {
+		return [];
+	}
+
+	public function orderBy():array {
+		return [];
+	}
+
+	public function limit():array {
+		return [];
+	}
+}

test/phpunit/Helper/DeleteOrderByExample.php

@@ -0,0 +1,24 @@
+<?php
+namespace Gt\SqlBuilder\Test\Helper;
+
+use Gt\SqlBuilder\Query\DeleteQuery;
+
+class DeleteOrderByExample extends DeleteQuery {
+	public function from():array {
+		return [
+			"student",
+		];
+	}
+
+	public function orderBy():array {
+		return [
+			"createdAt desc"
+		];
+	}
+
+	public function limit():array {
+		return [
+			10,
+		];
+	}
+}

test/phpunit/Helper/Query/DeleteExample.php

@@ -0,0 +1,22 @@
+<?php
+namespace Gt\SqlBuilder\Test\Helper\Query;
+
+use Gt\SqlBuilder\Query\DeleteQuery;
+
+class DeleteExample extends DeleteQuery {
+	public function from():array {
+		return [
+			"student",
+		];
+	}
+
+	public function where():array {
+		return [
+			"id = :id",
+		];
+	}
+
+	public function limit():array {
+		return [1];
+	}
+}

test/phpunit/Helper/Query/DeletePartitionExample.php

@@ -0,0 +1,26 @@
+<?php
+namespace Gt\SqlBuilder\Test\Helper\Query;
+
+use Gt\SqlBuilder\Query\DeleteQuery;
+
+class DeletePartitionExample extends DeleteQuery {
+	public function from():array {
+		return [
+			"student",
+		];
+	}
+
+	public function partition():array {
+		return [
+			"exp1",
+			"exp2",
+			"exp3",
+		];
+	}
+
+	public function where():array {
+		return [
+			"toDelete = 1",
+		];
+	}
+}

test/phpunit/Query/DeleteQueryTest.php

@@ -0,0 +1,27 @@
+<?php
+namespace Gt\SqlBuilder\Test\Query;
+
+use Gt\SqlBuilder\Test\Helper\DeleteOrderByExample;
+use Gt\SqlBuilder\Test\Helper\Query\DeleteExample;
+use Gt\SqlBuilder\Test\Helper\Query\DeletePartitionExample;
+use Gt\SqlBuilder\Test\QueryTestCase;
+
+class DeleteQueryTest extends QueryTestCase {
+	public function testDelete() {
+		$sut = new DeleteExample();
+		$sql = self::normalise($sut);
+		self::assertEquals("delete from student where id = :id limit 1", $sql);
+	}
+
+	public function testDeletePartition() {
+		$sut = new DeletePartitionExample();
+		$sql = self::normalise($sut);
+		self::assertEquals("delete from student partition ( exp1, exp2, exp3 ) where toDelete = 1", $sql);
+	}
+
+	public function testDeleteOrderBy() {
+		$sut = new DeleteOrderByExample();
+		$sql = self::normalise($sut);
+		self::assertEquals("delete from student order by createdAt desc limit 10", $sql);
+	}
+}