spec: test creating images with different base formats

Also decreased test image sizes to 1 and 2 MiB

Author: jfontan

spec/qcow2_spec.rb

@@ -5,8 +5,11 @@
 
 require 'qcow2'
 require 'fileutils'
+require 'systemu'
 
-IMAGE_SIZE = 100 * 1024 * 1024
+IMAGE_SIZE = 1 * 1024 * 1024
+SHA_1 = '3b71f43ff30f4b15b5cd85dd9e95ebc7e84eb5a3'
+SHA_2 = '7d76d48d64d7ac5411d714a4bb83f37e3e5b8df6'
 
 describe Cangallo::Qcow2 do
   before :all do
@@ -65,14 +68,14 @@
       qcow2 = Cangallo::Qcow2.new(@qcow2_path)
 
       sha1 = qcow2.sha1
-      expect(sha1).to eq('2c2ceccb5ec5574f791d45b63c940cff20550f9a')
+      expect(sha1).to eq(SHA_1)
     end
 
     it 'should be able to compute sha1 (raw)' do
       qcow2 = Cangallo::Qcow2.new(@raw_path)
 
       sha1 = qcow2.sha1
-      expect(sha1).to eq('2c2ceccb5ec5574f791d45b63c940cff20550f9a')
+      expect(sha1).to eq(SHA_1)
     end
   end
 
@@ -122,14 +125,14 @@
       qcow2 = Cangallo::Qcow2.new(@qcow2_path)
 
       sha1 = qcow2.sha1
-      expect(sha1).to eq('fd7c5327c68fcf94b62dc9f58fc1cdb3c8c01258')
+      expect(sha1).to eq(SHA_2)
     end
 
     it 'should be able to compute sha1 (raw)' do
       qcow2 = Cangallo::Qcow2.new(@raw_path)
 
       sha1 = qcow2.sha1
-      expect(sha1).to eq('fd7c5327c68fcf94b62dc9f58fc1cdb3c8c01258')
+      expect(sha1).to eq(SHA_2)
     end
   end
 
@@ -199,4 +202,26 @@
       expect(info['backing-filename-format']).to eq(nil)
     end
   end
+
+  context 'different backing image formats' do
+    before :all do
+      formats = ['qcow', 'qcow2', 'qed', 'raw', 'vmdk', 'vdi', 'vhdx']
+      @images = []
+
+      formats.each do |format|
+        name = File.join(@tmpdir, "base_format.#{format}")
+        @images << name
+        cmd = "qemu-img create -f #{format} #{name} #{IMAGE_SIZE}"
+        pr = systemu cmd
+        expect(pr[0].success?).to eq(true)
+      end
+    end
+
+    it 'should be able to create chained images' do
+      @images.each do |image|
+        name = "#{image}.chained"
+        Cangallo::Qcow2.create(name, image, IMAGE_SIZE)
+      end
+    end
+  end
 end