Create README.md

addressing #4

tests/README.md

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+# Testing
+
+There are currently three IDAPython scripts used to test `flare-emu`.
+
+* flare_emu_test.py - Basic tests of the `emulateRange` and `iterate` features
+* flare_emu_test_hooks.py - Tests the naive implementations of all the supported CRT and Windows API hooks
+* objc2_analyzer_test.py - Tests the basic functionality of objc2_analyzer.py
+
+The `flare_emu_test_<arch>` binaries are Mach-O executables that should be loaded into IDA Pro and tested with the `flare_emu_test.py` IDAPython script.
+
+The `flare_emu_winhooks_test_x86.exe` binary is a PE executable that should be loaded into IDA Pro and tested with the `flare_emu_test_hooks.py` IDAPython script. You may need to apply the `printf` name to the `printf` function in the binary if IDA Pro fails to do so.
+
+The `objc2_analyzer_test_<arch>` binaries are Mach-O executables that should be loaded into IDA Pro and tested with the `objc2_analyzer_test.py` IDAPython script.
+
+Check the printed output of these test scripts to ensure there are no reported errors.