add sample files for unit tests

.gitignore

@@ -3,3 +3,4 @@
 id_ed25519
 id_ed25519.pub
 license.txt
+!license/licenseutil/testdata/*

license/licenseutil/testdata/id_ed25519

+igKcBrZcRZDtpBfiInmQREgbsKL31jI2K9f7AitmKUYIfb/bvHeOb46yRyG8nbhLern1OdvXf0Td/rClQ8pyDQ==
\ No newline at end of file

license/licenseutil/testdata/id_ed25519.pub

+CH2/27x3jm+OskchvJ24S3q59Tnb139E3f6wpUPKcg0=
\ No newline at end of file

license/licenseutil/testdata/license.txt

+-----BEGIN LICENSE KEY-----
+q0hU7VFWASXA5FZnHiYnvt+DD3Gw2u4HTXDXIzYDzSbHkgSI7MoMjhz2KHSw7PFP
+1WLWUQwxT1XnzCw/HRndC3siY3VzIjoiY3VzX0N4b3lxYUM0cDRIamwwIiwic3Vi
+Ijoic3ViX0E0bDlYa0N4eVpQY1MyIiwiaWF0IjoiMjAxOC0wNS0zMVQxNjoyMjo0
+Ny40ODcwNDc2ODlaIiwiZXhwIjoiMjAxOC0wNy0wMVQxNjoyMjo0Ny40ODcwNDc0
+NzdaIn0=
+-----END LICENSE KEY-----

license/licenseutil/testdata/license_invalid_encoding.txt

+-----BEGIN LICENSE KEY-----
+iAQ3sNM0CgQIb9DpurcnVdScJaUp6ml86Q+V/WWTO11i3rogtvfElWLCCKFVcQA6
+joJxOqCoRMwbga3tdOG7DnsiY3VzIjoiY3VzX0N4b3lxYUM0cDRIamwwIiwic3Vi
+Ijoic3ViX0E0bDlYa0N4eVpQY1MyIiwiaWF0IjoiMjAxOC0wNS0zMVQxNjoyMjoy
+MC40MjIzMTE5MThaIiwiZXhwIjoiMjAxOC0wNy0wMVQxNjoyMjoyMC40MjIzMTE2
+MDVaIn0===
+-----END LICENSE KEY-----

license/licenseutil/testdata/license_invalid_json.txt

+-----BEGIN LICENSE KEY-----
+VHdhcyBicmlsbGlnLCBhbmQgdGhlIHNsaXRoeSB0b3Zlcw==
+-----END LICENSE KEY-----

license/licenseutil/testdata/license_invalid_signature.txt

+-----BEGIN LICENSE KEY-----
+iAQ3sNM0CgQIb9DpurcnVdScJaUp6ml86Q+V/WWTO11i3rogtvfElWLCCKFVcQA6
+joJxOqCoRMwbga3tdOG7DnsiY3VzIjoiY3VzX0N4b3lxYUM0cDRIamwwIiwic3Vi
+Ijoic3ViX0E0bDlYa0N4eVpQY1MyIiwiaWF0IjoiMjAxOC0wNS0zMVQxNjoyMjoy
+MC40MjIzMTE5MThaIiwiZXhwIjoiMjAxOC0wNy0wMVQxNjoyMjoyMC40MjIzMTE2
+MDVaIn0=
+-----END LICENSE KEY-----