diff --git a/src/main/resources/2.1/testAddGetSize.png b/src/main/resources/2.1/testAddGetSize.png
new file mode 100644
index 0000000..9c92c3e
Binary files /dev/null and b/src/main/resources/2.1/testAddGetSize.png differ
diff --git a/src/main/resources/2.1/testAddGetSize.uxf b/src/main/resources/2.1/testAddGetSize.uxf
new file mode 100644
index 0000000..184153b
--- /dev/null
+++ b/src/main/resources/2.1/testAddGetSize.uxf
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<diagram program="umlet" version="14.3.0">
+  <zoom_level>10</zoom_level>
+  <element>
+    <id>UMLClass</id>
+    <coordinates>
+      <x>40</x>
+      <y>20</y>
+      <w>210</w>
+      <h>70</h>
+    </coordinates>
+    <panel_attributes>_db: StarsDatabase_
+--
+</panel_attributes>
+    <additional_attributes/>
+  </element>
+  <element>
+    <id>UMLClass</id>
+    <coordinates>
+      <x>40</x>
+      <y>210</y>
+      <w>210</w>
+      <h>70</h>
+    </coordinates>
+    <panel_attributes>_star: Star_
+--
+- name: "Sirius"
+- id: "TYC 5949-2777-1"</panel_attributes>
+    <additional_attributes/>
+  </element>
+  <element>
+    <id>Relation</id>
+    <coordinates>
+      <x>110</x>
+      <y>80</y>
+      <w>70</w>
+      <h>150</h>
+    </coordinates>
+    <panel_attributes>lt=-
+m2=stars[0]
+</panel_attributes>
+    <additional_attributes>10.0;10.0;10.0;130.0</additional_attributes>
+  </element>
+</diagram>
diff --git a/src/main/resources/2.1/testAddRemoveSize.png b/src/main/resources/2.1/testAddRemoveSize.png
new file mode 100644
index 0000000..9976a92
Binary files /dev/null and b/src/main/resources/2.1/testAddRemoveSize.png differ
diff --git a/src/main/resources/2.1/testAddRemoveSize.uxf b/src/main/resources/2.1/testAddRemoveSize.uxf
new file mode 100644
index 0000000..aecb2af
--- /dev/null
+++ b/src/main/resources/2.1/testAddRemoveSize.uxf
@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<diagram program="umlet" version="14.3.0">
+  <zoom_level>10</zoom_level>
+  <element>
+    <id>UMLClass</id>
+    <coordinates>
+      <x>220</x>
+      <y>120</y>
+      <w>210</w>
+      <h>70</h>
+    </coordinates>
+    <panel_attributes>_db: StarsDatabase_
+--
+</panel_attributes>
+    <additional_attributes/>
+  </element>
+  <element>
+    <id>Relation</id>
+    <coordinates>
+      <x>150</x>
+      <y>180</y>
+      <w>100</w>
+      <h>160</h>
+    </coordinates>
+    <panel_attributes>lt=-
+m2=stars[0]
+</panel_attributes>
+    <additional_attributes>80.0;10.0;10.0;140.0</additional_attributes>
+  </element>
+  <element>
+    <id>Relation</id>
+    <coordinates>
+      <x>410</x>
+      <y>180</y>
+      <w>130</w>
+      <h>160</h>
+    </coordinates>
+    <panel_attributes>lt=-
+r2=stars[1]
+</panel_attributes>
+    <additional_attributes>10.0;10.0;70.0;140.0</additional_attributes>
+  </element>
+  <element>
+    <id>UMLClass</id>
+    <coordinates>
+      <x>440</x>
+      <y>320</y>
+      <w>210</w>
+      <h>70</h>
+    </coordinates>
+    <panel_attributes>_sirius: Star_
+--
+- name: "Sirius"
+- id: "TYC 5949-2777-1"</panel_attributes>
+    <additional_attributes/>
+  </element>
+  <element>
+    <id>UMLClass</id>
+    <coordinates>
+      <x>70</x>
+      <y>320</y>
+      <w>210</w>
+      <h>70</h>
+    </coordinates>
+    <panel_attributes>_: Star_
+--
+- name: "Alpha Centauri"
+- id: "TYC 9007-5849-1"</panel_attributes>
+    <additional_attributes/>
+  </element>
+</diagram>
diff --git a/src/main/resources/2.1/testFind.png b/src/main/resources/2.1/testFind.png
new file mode 100644
index 0000000..6630fb4
Binary files /dev/null and b/src/main/resources/2.1/testFind.png differ
diff --git a/src/main/resources/2.1/testFind.uxf b/src/main/resources/2.1/testFind.uxf
new file mode 100644
index 0000000..2e013bf
--- /dev/null
+++ b/src/main/resources/2.1/testFind.uxf
@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<diagram program="umlet" version="14.3.0">
+  <zoom_level>10</zoom_level>
+  <element>
+    <id>UMLClass</id>
+    <coordinates>
+      <x>220</x>
+      <y>90</y>
+      <w>210</w>
+      <h>70</h>
+    </coordinates>
+    <panel_attributes>_db: StarsDatabase_
+--
+</panel_attributes>
+    <additional_attributes/>
+  </element>
+  <element>
+    <id>Relation</id>
+    <coordinates>
+      <x>150</x>
+      <y>150</y>
+      <w>100</w>
+      <h>160</h>
+    </coordinates>
+    <panel_attributes>lt=-
+m2=stars[0]
+</panel_attributes>
+    <additional_attributes>80.0;10.0;10.0;140.0</additional_attributes>
+  </element>
+  <element>
+    <id>Relation</id>
+    <coordinates>
+      <x>410</x>
+      <y>150</y>
+      <w>130</w>
+      <h>160</h>
+    </coordinates>
+    <panel_attributes>lt=-
+r2=stars[1]
+</panel_attributes>
+    <additional_attributes>10.0;10.0;70.0;140.0</additional_attributes>
+  </element>
+  <element>
+    <id>UMLClass</id>
+    <coordinates>
+      <x>70</x>
+      <y>290</y>
+      <w>210</w>
+      <h>70</h>
+    </coordinates>
+    <panel_attributes>_: Star_
+--
+- name: "Sirius"
+- id: "TYC 5949-2777-1"</panel_attributes>
+    <additional_attributes/>
+  </element>
+  <element>
+    <id>UMLClass</id>
+    <coordinates>
+      <x>440</x>
+      <y>290</y>
+      <w>210</w>
+      <h>70</h>
+    </coordinates>
+    <panel_attributes>_: Star_
+--
+- name: "Alpha Centauri"
+- id: "TYC 9007-5849-1"</panel_attributes>
+    <additional_attributes/>
+  </element>
+  <element>
+    <id>UMLClass</id>
+    <coordinates>
+      <x>210</x>
+      <y>420</y>
+      <w>210</w>
+      <h>70</h>
+    </coordinates>
+    <panel_attributes>_star: Star_
+--
+- name: null
+- id: null</panel_attributes>
+    <additional_attributes/>
+  </element>
+</diagram>