Define bootloader test plan (ARMmbed#97)

Author: LiyouZhou

docs/test-plan.md

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+# Test Plan
+
+## Goals:
+
+- Validate bootloader functionality
+    -Ensure that Bootloader does not violate the UC/BL contract
+- Validate bootloader configurations for a new platform
+- The bootloader needs to be validated as a standalone product
+
+## Functional Tests:
+
+### Firmware update
+
+1. Given correct header and active firmware, bootloader boots into the active image.
+1. Given correct header and a single firmware candidate, bootloader copies the candidate onto the active region and boots into the active image
+
+### Rollback protection
+
+1. Given single firmware candidate with a same or older version than the active, does not perform an update.
+
+### Multiple candidates
+
+1. Given 2 valid firmware candidates, perform update with newer firmware.
+1. Given 2 valid firmware candidates of the exact same content and header, perform update with either firmware.
+1. Set max firmare candidate slots to 1 and give valid firmware in slot 2, does not perform update.
+
+### Integrity check of firmware candidates
+
+1. Given corrupted candidate header, does not perform update.
+1. Given corrupted candidate firmware, does not perform update.
+1. Given old header version, does not perform update.
+
+### Integrity check of active firmware
+
+1. Given corrupted active firmware header, does not boot into firmware.
+1. Given corrupted active firmware, does not boot into firmware.
+1. Given corrupted active firmware, valid firmware candidate of older version, always perform update.
+
+### Overall size (< 32K)
+
+1. Test that the compiled binary does not exeed 32K limit
+
+## Stress Tests
+
+### Successful update
+
+1. Repeatedly update firmware candidate onto active region
+
+### Forward to Application
+
+1. Repeatedly reboot device and see that the application boots up successfully every time
+
+### Power Cut
+
+1. power cut at a random times during whole firmware update process
+
+## Testing Variants of the bootloader
+
+### Platforms
+
+1. K64F
+1. NUCLEO_F429ZI
+1. UBLOX_EVK_ODIN_W2
+
+### Storage options
+
+1. SD Block Device with ARM_UCP_FLASHIAP_BLOCKDEVICE
+1. Internal Flash with ARM_UCP_FLASHIAP
+
+### RoT options
+
+1. SOTP
+1. Insecure Example RoT