-zlib-no-eof.trace is a short, zlib compressed trace, with an unexpected end of
-file because the application terminated abnormally (which is actual very
-normal).
+This directory tests various operations of the apitrace command-line
+interface (cli) operating on existings.
-Depending on how zlib handles the unexpected end of file, it may fail to read
-any data from it.
+All files with a .script extension specify a simple script for
+testing. The test driver (in ../tool_driver.py) will parse the script
+file line-by-line, interpreting each line as arguments to the apitrace
+cli interface and invoking the cli with the given arguments. This
+continues until the first line of the script beginning with the "dump"
+command.
+
+After a "dump" command in the script, the remainder of the script file
+provides the expected output of the given dump command. The tool
+driver will report a test failure if the actual dump output differs
+from that given in the.
+
+Here are descriptions of some of the trace files contained here which
+are used by the test scripts:
+
+* zlib-no-eof.trace: is a short, zlib compressed trace, with an unexpected end of
+ file because the application terminated abnormally (which is actual very
+ normal).
+
+ Depending on how zlib handles the unexpected end of file, it may fail to read
+ any data from it.
+
+* incomplete-call.trace: trace with an incomplete call, with missing arguments
+
+* glxsimple.trace: trace from a simple program showing drawing with
+ glClear, with GLSL shader, and with texture. See ../cli/src
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