Fix integration tests

Author: simolus3

integration_tests/flutter_libs/android/app/build.gradle

@@ -26,7 +26,7 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 31
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'

integration_tests/flutter_libs/android/build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.3.50'
+    ext.kotlin_version = '1.6.10'
     repositories {
         google()
         jcenter()

integration_tests/flutter_libs/test_driver/integration.dart

@@ -44,6 +44,7 @@ void main() {
 
   test('can open databases', () {
     final db = sqlite3.openInMemory()
+      ..closeWhenDone()
       ..execute('CREATE TABLE foo (bar)')
       ..execute('INSERT INTO foo VALUES (1), (2)');
 
@@ -53,8 +54,18 @@ void main() {
     ]);
   });
 
+  test('has json support', () {
+    final db = sqlite3.openInMemory()..closeWhenDone();
+    expect(db.select("SELECT json('[1,  2, 3]') AS r;"), [
+      {'r': '[1,2,3]'},
+    ]);
+  });
+
+  test('has fts5 support', () {});
+
   test('can create collation', () {
     final db = sqlite3.openInMemory()
+      ..closeWhenDone()
       ..execute('CREATE TABLE foo2 (bar)')
       ..execute(
           "INSERT INTO foo2 VALUES ('AaAaaaAA'), ('BBBbBb'),('cCCCcc    '), ('  dD   ')");
@@ -108,3 +119,7 @@ void main() {
         []);
   });
 }
+
+extension on Database {
+  void closeWhenDone() => addTearDown(dispose);
+}

integration_tests/sqlcipher_flutter/android/app/build.gradle

@@ -26,7 +26,7 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 31
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'

integration_tests/sqlcipher_flutter/android/build.gradle

@@ -1,12 +1,12 @@
 buildscript {
-    ext.kotlin_version = '1.3.50'
+    ext.kotlin_version = '1.6.10'
     repositories {
         google()
         jcenter()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath 'com.android.tools.build:gradle:7.0.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }

integration_tests/sqlcipher_flutter/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-all.zip

sqlite3/test/database_test.dart

@@ -181,7 +181,9 @@ void main() {
     // Make sure the path exists
     await Directory(dirname(path)).create(recursive: true);
     // but not the db
-    await File(path).delete();
+    if (File(path).existsSync()) {
+      await File(path).delete();
+    }
 
     // Opening a non-existent database should fail
     expect(