ProviderTestRule


class ProviderTestRule : TestRule


A TestRule to test ContentProviders, with additional APIs to enable easy initialization such as restoring database from a file, running database commands passed in as a String or a file. By default, all permissions are granted when they are checked in ContentProviders under test, method revokePermission can be used to revoke specific permissions to test the cases when they are denied in ContentProviders.

Note: The database related methods setDatabaseFile, setDatabaseCommands, setDatabaseCommandsFile and runDatabaseCommands should only be used when ContentProvider under test is implemented based on SQLiteDatabase.

If more than one database related methods are used for a ContentProvider under test, the execution order of restoring database from file and running database commands are independent of the order those methods are called. If all methods are used, when setting up the ContentProvider for test, the execution order is as follows:

  1. Restore database from file passed in via setDatabaseFile
  2. Run database commands passed in via setDatabaseCommands
  3. Run database commands from file passed in via setDatabaseCommandsFile

If the ContentProvider under test is not implemented based on SQLiteDatabase, or is implemented based on SQLiteDatabase but no extra database initialization workloads are needed, the rule can be created by simply using Builder(Class,String).

Usage example:

@Rule
public ProviderTestRule mProviderRule =
    new ProviderTestRule.Builder(MyContentProvider.class, MyContentProvider.AUTHORITY).build();

@Test
public void verifyContentProviderContractWorks() {
    ContentResolver resolver = mProviderRule.getResolver();
    // perform some database (or other) operations
    Uri uri = resolver.insert(testUrl, testContentValues);
    // perform some assertions on the resulting URI
    assertNotNull(uri);
}

Alternatively, if the ContentProvider under test is based on SQLiteDatabase, then all database related methods can be used. However, the database name argument passed in via these methods must match the actual database name used by the ContentProvider under test.

Usage example:

@Rule
public ProviderTestRule mProviderRule =
    new ProviderTestRule.Builder(MyContentProvider.class, MyContentProvider.AUTHORITY)
        .setDatabaseCommands(DATABASE_NAME, INSERT_ONE_ENTRY_CMD, INSERT_ANOTHER_ENTRY_CMD)
        .build();

@Test
public void verifyTwoEntriesInserted() {
    ContentResolver resolver = mProviderRule.getResolver();
    // two entries are already inserted by rule, we can directly perform assertions to verify
    Cursor c = null;
    try {
      c = resolver.query(URI_TO_QUERY_ALL, null, null, null, null);
      assertNotNull(c);
      assertEquals(2, c.getCount());
    } finally {
      if (c != null && !c.isClosed()) {
        c.close();
      }
    }
}

Summary

Nested types

This class is deprecated.

Consider using a real provider, or implementing a fake ContentProvider specific to your use case.

Public functions

Statement!
apply(base: Statement!, description: Description!)
Unit
revokePermission(permission: String)

Revoke permission anytime during the tests.

Unit
runDatabaseCommands(dbName: String, dbCmds: Array<String!>)

Run database commands anytime during the tests, after the rule is created.

Protected functions

Unit

Override this method to execute any code that should run after provider is cleaned up.

Unit

Override this method to execute any code that should run before provider is set up.

Public properties

ContentResolver!

Public functions

apply

fun apply(base: Statement!, description: Description!): Statement!

revokePermission

fun revokePermission(permission: String): Unit

Revoke permission anytime during the tests. The default return value of the following methods is PackageManager.PERMISSION_GRANTED. After a specific permission is revoked, the value returned becomes PackageManager.PERMISSION_DENIED when calling the methods with the revoked permission. After a test, the return values are restored to PackageManager.PERMISSION_GRANTED.

Consequentially, calling the following methods with the revoked permission will throw a .

runDatabaseCommands

fun runDatabaseCommands(dbName: String, dbCmds: Array<String!>): Unit

Run database commands anytime during the tests, after the rule is created.

Parameters
dbName: String

The name of the underlying database used by the ContentProvider under test.

dbCmds: Array<String!>

The SQL commands to run during tests. Each command will be passed to execSQL to execute.

Protected functions

afterProviderCleanedUp

protected fun afterProviderCleanedUp(): Unit

Override this method to execute any code that should run after provider is cleaned up. This method is called after each test method, including any method annotated with After.

beforeProviderSetup

protected fun beforeProviderSetup(): Unit

Override this method to execute any code that should run before provider is set up. This method is called before each test method, including any method annotated with Before.

Public properties

resolver

val resolverContentResolver!