diff --git a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php
index 1d846f0..794d788 100644
--- a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php
+++ b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/DateFieldTest.php
@@ -30,6 +30,10 @@ public function testUnknownDateType() {
 
     $this->setExpectedException(MigrateException::class, "Field field_date of type 'timestamp' is an unknown date field type.");
     $this->plugin->defineValueProcessPipeline($this->migration, 'field_date', ['type' => 'timestamp']);
+
+    // Retain backwards compatibility testing.
+    $this->setExpectedException(MigrateException::class, "Field field_date of type 'timestamp' is an unknown date field type.");
+    $this->plugin->processFieldValues($this->migration, 'field_date', ['type' => 'timestamp']);
   }
 
 }
diff --git a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldTest.php b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldTest.php
index 4c50ef5..056e0fe 100644
--- a/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldTest.php
+++ b/core/modules/datetime/tests/src/Unit/Plugin/migrate/field/d6/DateFieldTest.php
@@ -31,6 +31,10 @@ public function testUnknownDateType() {
 
     $this->setExpectedException(MigrateException::class, "Field field_date of type 'timestamp' is an unknown date field type.");
     $this->plugin->defineValueProcessPipeline($this->migration, 'field_date', ['type' => 'timestamp']);
+
+    // Retain backwards compatibility testing.
+    $this->setExpectedException(MigrateException::class, "Field field_date of type 'timestamp' is an unknown date field type.");
+    $this->plugin->processFieldValues($this->migration, 'field_date', ['type' => 'timestamp']);
   }
 
 }
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php
index 2e5894e..937cd7d 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d6/FileFieldTest.php
@@ -44,6 +44,19 @@ protected function setUp() {
   }
 
   /**
+   * @covers ::processFieldValues
+   */
+  public function testProcessFieldValues() {
+    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+
+    $expected = [
+      'plugin' => 'd6_field_file',
+      'source' => 'somefieldname',
+    ];
+    $this->assertSame($expected, $this->migration->getProcess());
+  }
+
+  /**
    * @covers ::defineValueProcessPipeline
    */
   public function testDefineValueProcessPipeline() {
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php
index de269fe..c0d965f 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/FileFieldTest.php
@@ -44,6 +44,24 @@ protected function setUp() {
   }
 
   /**
+   * @covers ::processFieldValues
+   */
+  public function testProcessFieldValues() {
+    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+
+    $expected = [
+      'plugin' => 'iterator',
+      'source' => 'somefieldname',
+      'process' => [
+        'target_id' => 'fid',
+        'display' => 'display',
+        'description' => 'description',
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess());
+  }
+
+  /**
    * @covers ::defineValueProcessPipeline
    */
   public function testDefineValueProcessPipeline() {
diff --git a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php
index b37df43..af0128b 100644
--- a/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php
+++ b/core/modules/file/tests/src/Unit/Plugin/migrate/field/d7/ImageFieldTest.php
@@ -43,6 +43,26 @@ protected function setUp() {
   }
 
   /**
+   * @covers ::processFieldValues
+   */
+  public function testProcessFieldValues() {
+    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+
+    $expected = [
+      'plugin' => 'iterator',
+      'source' => 'somefieldname',
+      'process' => [
+        'target_id' => 'fid',
+        'alt' => 'alt',
+        'title' => 'title',
+        'width' => 'width',
+        'height' => 'height',
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess());
+  }
+
+  /**
    * @covers ::defineValueProcessPipeline
    */
   public function testDefineValueProcessPipeline() {
diff --git a/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckTest.php b/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckTest.php
index b0c7f0a..a645f42 100644
--- a/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckTest.php
+++ b/core/modules/link/tests/src/Kernel/Plugin/migrate/cckfield/d7/LinkCckTest.php
@@ -52,6 +52,25 @@ protected function setUp() {
   }
 
   /**
+   * @covers ::processCckFieldValues
+   */
+  public function testProcessCckFieldValues() {
+    $this->plugin->processFieldInstance($this->migration);
+
+    $expected = [
+      'plugin' => 'static_map',
+      'source' => 'settings/title',
+      'bypass' => TRUE,
+      'map' => [
+        'disabled' => DRUPAL_DISABLED,
+        'optional' => DRUPAL_OPTIONAL,
+        'required' => DRUPAL_REQUIRED,
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess());
+  }
+
+  /**
    * @covers ::alterFieldInstanceMigration
    */
   public function testAlterFieldInstanceMigration() {
diff --git a/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldTest.php b/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldTest.php
index 280ed45b..10ce553 100644
--- a/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldTest.php
+++ b/core/modules/link/tests/src/Kernel/Plugin/migrate/field/d7/LinkFieldTest.php
@@ -51,6 +51,25 @@ protected function setUp() {
   }
 
   /**
+   * @covers ::processFieldInstance
+   */
+  public function testProcessFieldInstance() {
+    $this->plugin->processFieldInstance($this->migration);
+
+    $expected = [
+      'plugin' => 'static_map',
+      'source' => 'settings/title',
+      'bypass' => TRUE,
+      'map' => [
+        'disabled' => DRUPAL_DISABLED,
+        'optional' => DRUPAL_OPTIONAL,
+        'required' => DRUPAL_REQUIRED,
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess());
+  }
+
+  /**
    * @covers ::alterFieldInstanceMigration
    */
   public function testAlterFieldInstanceMigration() {
diff --git a/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldTest.php b/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldTest.php
index 201b652..013062b 100644
--- a/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldTest.php
+++ b/core/modules/link/tests/src/Unit/Plugin/migrate/field/d6/LinkFieldTest.php
@@ -44,6 +44,19 @@ protected function setUp() {
   }
 
   /**
+   * @covers ::processFieldValues
+   */
+  public function testProcessFieldValues() {
+    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+
+    $expected = [
+      'plugin' => 'field_link',
+      'source' => 'somefieldname',
+    ];
+    $this->assertSame($expected, $this->migration->getProcess());
+  }
+
+  /**
    * @covers ::defineValueProcessPipeline
    */
   public function testDefineValueProcessPipeline() {
diff --git a/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckTest.php b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckTest.php
index 8e5147c..059f841 100644
--- a/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckTest.php
+++ b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/cckfield/TaxonomyTermReferenceCckTest.php
@@ -48,6 +48,38 @@ protected function setUp() {
    * @covers ::processCckFieldValues
    */
   public function testProcessCckFieldValues() {
+    $this->plugin->processCckFieldValues($this->migration, 'somefieldname', []);
+
+    $expected = [
+      'plugin' => 'iterator',
+      'source' => 'somefieldname',
+      'process' => [
+        'target_id' => 'tid',
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess());
+  }
+
+  /**
+   * @covers ::processFieldValues
+   */
+  public function testProcessFieldValues() {
+    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+
+    $expected = [
+      'plugin' => 'iterator',
+      'source' => 'somefieldname',
+      'process' => [
+        'target_id' => 'tid',
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess());
+  }
+
+  /**
+   * @covers ::defineValueProcessPipeline
+   */
+  public function testDefineValueProcessPipeline() {
     $this->plugin->defineValueProcessPipeline($this->migration, 'somefieldname', []);
 
     $expected = [
diff --git a/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldTest.php b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldTest.php
index 17aec9b..54266ec 100644
--- a/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldTest.php
+++ b/core/modules/taxonomy/tests/src/Unit/Plugin/migrate/field/TaxonomyTermReferenceFieldTest.php
@@ -44,6 +44,22 @@ protected function setUp() {
   }
 
   /**
+   * @covers ::processFieldValues
+   */
+  public function testProcessFieldValues() {
+    $this->plugin->processFieldValues($this->migration, 'somefieldname', []);
+
+    $expected = [
+      'plugin' => 'iterator',
+      'source' => 'somefieldname',
+      'process' => [
+        'target_id' => 'tid',
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess());
+  }
+
+  /**
    * @covers ::defineValueProcessPipeline
    */
   public function testDefineValueProcessPipeline() {
diff --git a/core/modules/text/tests/src/Unit/Migrate/d6/TextFieldTest.php b/core/modules/text/tests/src/Unit/Migrate/d6/TextFieldTest.php
index 7125df5..ce536b6 100644
--- a/core/modules/text/tests/src/Unit/Migrate/d6/TextFieldTest.php
+++ b/core/modules/text/tests/src/Unit/Migrate/d6/TextFieldTest.php
@@ -46,13 +46,13 @@ protected function setUp() {
   }
 
   /**
-   * @covers ::defineValueProcessPipeline
+   * @covers ::processFieldValues
    */
   public function testProcessFilteredTextFieldValues() {
     $field_info = [
       'widget_type' => 'text_textfield',
     ];
-    $this->plugin->defineValueProcessPipeline($this->migration, 'body', $field_info);
+    $this->plugin->processFieldValues($this->migration, 'body', $field_info);
 
     $process = $this->migration->getProcess();
     $this->assertSame('iterator', $process['plugin']);
@@ -71,6 +71,29 @@ public function testProcessFilteredTextFieldValues() {
   /**
    * @covers ::defineValueProcessPipeline
    */
+  public function testFilteredTextValueProcessPipeline() {
+    $field_info = [
+      'widget_type' => 'text_textfield',
+    ];
+    $this->plugin->defineValueProcessPipeline($this->migration, 'body', $field_info);
+
+    $process = $this->migration->getProcess();
+    $this->assertSame('iterator', $process['plugin']);
+    $this->assertSame('body', $process['source']);
+    $this->assertSame('value', $process['process']['value']);
+
+    // Ensure that filter format IDs will be looked up in the filter format
+    // migrations.
+    $lookup = $process['process']['format'][2];
+    $this->assertSame('migration', $lookup['plugin']);
+    $this->assertContains('d6_filter_format', $lookup['migration']);
+    $this->assertContains('d7_filter_format', $lookup['migration']);
+    $this->assertSame('format', $lookup['source']);
+  }
+
+  /**
+   * @covers ::processFieldValues
+   */
   public function testProcessBooleanTextImplicitValues() {
     $info = [
       'widget_type' => 'optionwidgets_onoff',
@@ -78,7 +101,7 @@ public function testProcessBooleanTextImplicitValues() {
         'allowed_values' => "foo\nbar",
       ]
     ];
-    $this->plugin->defineValueProcessPipeline($this->migration, 'field', $info);
+    $this->plugin->processFieldValues($this->migration, 'field', $info);
 
     $expected = [
       'value' => [
@@ -96,6 +119,31 @@ public function testProcessBooleanTextImplicitValues() {
   /**
    * @covers ::defineValueProcessPipeline
    */
+  public function testBooleanTextImplicitValueProcessPipeline() {
+    $info = [
+      'widget_type' => 'optionwidgets_onoff',
+      'global_settings' => [
+        'allowed_values' => "foo\nbar",
+      ]
+    ];
+    $this->plugin->defineValueProcessPipeline($this->migration, 'field', $info);
+
+    $expected = [
+      'value' => [
+        'plugin' => 'static_map',
+        'source' => 'value',
+        'default_value' => 0,
+        'map' => [
+          'bar' => 1,
+        ],
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess()['process']);
+  }
+
+  /**
+   * @covers ::processFieldValues
+   */
   public function testProcessBooleanTextExplicitValues() {
     $info = [
       'widget_type' => 'optionwidgets_onoff',
@@ -103,6 +151,31 @@ public function testProcessBooleanTextExplicitValues() {
         'allowed_values' => "foo|Foo\nbaz|Baz",
       ]
     ];
+    $this->plugin->processFieldValues($this->migration, 'field', $info);
+
+    $expected = [
+      'value' => [
+        'plugin' => 'static_map',
+        'source' => 'value',
+        'default_value' => 0,
+        'map' => [
+          'baz' => 1,
+        ],
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess()['process']);
+  }
+
+  /**
+   * @covers ::defineValueProcessPipeline
+   */
+  public function testBooleanTextExplicitValueProcessPipeline() {
+    $info = [
+      'widget_type' => 'optionwidgets_onoff',
+      'global_settings' => [
+        'allowed_values' => "foo|Foo\nbaz|Baz",
+      ]
+    ];
     $this->plugin->defineValueProcessPipeline($this->migration, 'field', $info);
 
     $expected = [
diff --git a/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php b/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php
index f9315e0..6a7fe4f 100644
--- a/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php
+++ b/core/modules/text/tests/src/Unit/Plugin/migrate/field/d6/TextFieldTest.php
@@ -45,13 +45,13 @@ protected function setUp() {
   }
 
   /**
-   * @covers ::defineValueProcessPipeline
+   * @covers ::processFieldValues
    */
   public function testProcessFilteredTextFieldValues() {
     $field_info = [
       'widget_type' => 'text_textfield',
     ];
-    $this->plugin->defineValueProcessPipeline($this->migration, 'body', $field_info);
+    $this->plugin->processFieldValues($this->migration, 'body', $field_info);
 
     $process = $this->migration->getProcess();
     $this->assertSame('iterator', $process['plugin']);
@@ -70,6 +70,29 @@ public function testProcessFilteredTextFieldValues() {
   /**
    * @covers ::defineValueProcessPipeline
    */
+  public function testFilteredTextValueProcessPipeline() {
+    $field_info = [
+      'widget_type' => 'text_textfield',
+    ];
+    $this->plugin->defineValueProcessPipeline($this->migration, 'body', $field_info);
+
+    $process = $this->migration->getProcess();
+    $this->assertSame('iterator', $process['plugin']);
+    $this->assertSame('body', $process['source']);
+    $this->assertSame('value', $process['process']['value']);
+
+    // Ensure that filter format IDs will be looked up in the filter format
+    // migrations.
+    $lookup = $process['process']['format'][2];
+    $this->assertSame('migration', $lookup['plugin']);
+    $this->assertContains('d6_filter_format', $lookup['migration']);
+    $this->assertContains('d7_filter_format', $lookup['migration']);
+    $this->assertSame('format', $lookup['source']);
+  }
+
+  /**
+   * @covers ::processFieldValues
+   */
   public function testProcessBooleanTextImplicitValues() {
     $info = [
       'widget_type' => 'optionwidgets_onoff',
@@ -77,7 +100,7 @@ public function testProcessBooleanTextImplicitValues() {
         'allowed_values' => "foo\nbar",
       ]
     ];
-    $this->plugin->defineValueProcessPipeline($this->migration, 'field', $info);
+    $this->plugin->processFieldValues($this->migration, 'field', $info);
 
     $expected = [
       'value' => [
@@ -95,6 +118,31 @@ public function testProcessBooleanTextImplicitValues() {
   /**
    * @covers ::defineValueProcessPipeline
    */
+  public function testBooleanTextImplicitValueProcessPipeline() {
+    $info = [
+      'widget_type' => 'optionwidgets_onoff',
+      'global_settings' => [
+        'allowed_values' => "foo\nbar",
+      ]
+    ];
+    $this->plugin->defineValueProcessPipeline($this->migration, 'field', $info);
+
+    $expected = [
+      'value' => [
+        'plugin' => 'static_map',
+        'source' => 'value',
+        'default_value' => 0,
+        'map' => [
+          'bar' => 1,
+        ],
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess()['process']);
+  }
+
+  /**
+   * @covers ::processFieldValues
+   */
   public function testProcessBooleanTextExplicitValues() {
     $info = [
       'widget_type' => 'optionwidgets_onoff',
@@ -102,6 +150,31 @@ public function testProcessBooleanTextExplicitValues() {
         'allowed_values' => "foo|Foo\nbaz|Baz",
       ]
     ];
+    $this->plugin->processFieldValues($this->migration, 'field', $info);
+
+    $expected = [
+      'value' => [
+        'plugin' => 'static_map',
+        'source' => 'value',
+        'default_value' => 0,
+        'map' => [
+          'baz' => 1,
+        ],
+      ],
+    ];
+    $this->assertSame($expected, $this->migration->getProcess()['process']);
+  }
+
+  /**
+   * @covers ::defineValueProcessPipeline
+   */
+  public function testBooleanTextExplicitValueProcessPipeline() {
+    $info = [
+      'widget_type' => 'optionwidgets_onoff',
+      'global_settings' => [
+        'allowed_values' => "foo|Foo\nbaz|Baz",
+      ]
+    ];
     $this->plugin->defineValueProcessPipeline($this->migration, 'field', $info);
 
     $expected = [