Cleaning and adding a valide mkfs conf in testdata

internal/statemachine/helper.go

@@ -237,14 +237,11 @@ func (stateMachine *StateMachine) copyStructureContent(volume *gadget.Volume,
 				contentRoot, err.Error())
 		}
 
-		fmt.Printf("current MKE2FS_CONFIG_ENV: %v", os.Getenv(MKE2FS_CONFIG_ENV))
 		// select the mkfs.ext4 conf to use
 		err = stateMachine.setMk2fsConf()
 		if err != nil {
 			return fmt.Errorf("Error preparing env for mkfs: %s", err.Error())
 		}
-		fmt.Printf("after setting it MKE2FS_CONFIG_ENV: %v", os.Getenv(MKE2FS_CONFIG_ENV))
-		// defer os.Unsetenv(MKE2FS_CONFIG_ENV)
 
 		// use mkfs functions from snapd to create the filesystems
 		if structure.Content != nil || len(contentFiles) > 0 {

internal/statemachine/testdata/mkfs/base_path_test/mantic/mke2fs.conf

@@ -1 +1,43 @@
-test
+[defaults]
+	base_features = sparse_super,large_file,filetype,resize_inode,dir_index,ext_attr
+	default_mntopts = acl,user_xattr
+	enable_periodic_fsck = 0
+	blocksize = 4096
+	inode_size = 256
+	inode_ratio = 16384
+
+[fs_types]
+	ext3 = {
+		features = has_journal
+	}
+	ext4 = {
+		features = has_journal,extent,huge_file,flex_bg,metadata_csum,64bit,dir_nlink,extra_isize
+	}
+	small = {
+		inode_ratio = 4096
+	}
+	floppy = {
+		inode_ratio = 8192
+	}
+	big = {
+		inode_ratio = 32768
+	}
+	huge = {
+		inode_ratio = 65536
+	}
+	news = {
+		inode_ratio = 4096
+	}
+	largefile = {
+		inode_ratio = 1048576
+		blocksize = -1
+	}
+	largefile4 = {
+		inode_ratio = 4194304
+		blocksize = -1
+	}
+	hurd = {
+	     blocksize = 4096
+	     inode_size = 128
+	     warn_y2038_dates = 0
+	}