Added testcase

src/modules/Kdump.rb

@@ -192,6 +192,9 @@ def main
       # map <string, string > of kdump settings
       #
       @KDUMP_SETTINGS = {}
+
+      # initial kdump settings replaced in Read function
+      @initial_kdump_settings = deep_copy(@KDUMP_SETTINGS)
     end
 
     # Abort function

test/fadump_test.rb

@@ -51,3 +51,21 @@
    expect(Yast::Kdump.use_fadump?).to be_false
  end
 end
+
+describe "#use_fadump_changed?" do
+  it "returns false if use_fadump not changed" do
+    Yast::Kdump.ReadKdumpSettings
+
+    expect(Yast::Kdump.use_fadump_changed?).to be_false
+  end
+
+  it "returns true if use_fadump changed" do
+    Yast::Kdump.ReadKdumpSettings
+
+    Yast::Kdump.stub(:fadump_supported?).and_return(true)
+    original_value = Yast::Kdump.use_fadump?
+    Yast::Kdump.use_fadump(! original_value)
+
+    expect(Yast::Kdump.use_fadump_changed?).to be_true
+  end
+end