disk: test that mountpoints from the bp were applied

Previously, the test suite didn't check whether the customizations
were actually applied to a partition table. This commit adds a tiny
function that tests that the correct Muntable is created in the
partition table and that all Sizeables above the Mountable have at least
the MinSize given by the blueprint.

pkg/disk/disk_test.go

@@ -420,6 +420,26 @@ func TestDisk_ForEachEntity(t *testing.T) {
 	assert.Equal(t, 8, count)
 }
 
+// blueprintApplied checks if the blueprint was applied correctly
+// returns nil if the blueprint was applied correctly, an error otherwise
+func blueprintApplied(pt *PartitionTable, bp []blueprint.FilesystemCustomization) error {
+	for _, mnt := range bp {
+		path := entityPath(pt, mnt.Mountpoint)
+		if path == nil {
+			return fmt.Errorf("mountpoint %s not found", mnt.Mountpoint)
+		}
+		for idx, ent := range path {
+			if sz, ok := ent.(Sizeable); ok {
+				if sz.GetSize() < mnt.MinSize {
+					return fmt.Errorf("entity %d in the path from %s is smaller (%d) than the requested minsize %d", idx, mnt.Mountpoint, sz.GetSize(), mnt.MinSize)
+				}
+			}
+		}
+	}
+
+	return nil
+}
+
 func TestCreatePartitionTable(t *testing.T) {
 	assert := assert.New(t)
 
@@ -467,6 +487,7 @@ func TestCreatePartitionTable(t *testing.T) {
 			assert.NotNil(mnt, "PT %q BP %q: failed to find root mountable", ptName, bpName)
 
 			assert.NoError(mpt.ForEachMountable(sizeCheckCB))
+			assert.NoError(blueprintApplied(mpt, bp), "PT %q BP %q: blueprint check failed", ptName, bpName)
 		}
 	}
 }
@@ -504,6 +525,7 @@ func TestCreatePartitionTableLVMify(t *testing.T) {
 				_, ok := parent.(*LVMLogicalVolume)
 				assert.True(ok, "PT %q BP %q: root's parent (%q) is not an LVM logical volume", ptName, bpName, parent)
 			}
+			assert.NoError(blueprintApplied(mpt, tbp), "PT %q BP %q: blueprint check failed", ptName, bpName)
 		}
 	}
 }
@@ -541,6 +563,7 @@ func TestCreatePartitionTableBtrfsify(t *testing.T) {
 				_, ok := parent.(*Btrfs)
 				assert.True(ok, "PT %q BP %q: root's parent (%+v) is not an btrfs volume but %T", ptName, bpName, parent, parent)
 			}
+			assert.NoError(blueprintApplied(mpt, tbp), "PT %q BP %q: blueprint check failed", ptName, bpName)
 		}
 	}
 }
@@ -620,6 +643,8 @@ func TestCreatePartitionTableLVMOnly(t *testing.T) {
 
 			assert.True(ok, "PT %q BP %q: root VG top level entity (%+v) is not a partition", ptName, bpName, rootTop)
 			assert.GreaterOrEqualf(vgPart.Size, lvsum, "PT %q BP %q: VG partition's size (%d) is smaller than the sum of logical volumes (%d)", ptName, bpName, vgPart.Size, lvsum)
+
+			assert.NoError(blueprintApplied(mpt, tbp), "PT %q BP %q: blueprint check failed", ptName, bpName)
 		}
 	}
 }