[lit] Ensure test output is converted to strings where possible.

- This cleans up the text output of failing tests when run under PY3.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188416 91177308-0d34-0410-b5e6-96231b3b80d8

utils/lit/lit/TestRunner.py

@@ -198,6 +198,16 @@ def executeShCmd(cmd, cfg, cwd, results):
         if res == -signal.SIGINT:
             raise KeyboardInterrupt
 
+        # Ensure the resulting output is always of string type.
+        try:
+            out = str(out.decode('ascii'))
+        except:
+            out = str(out)
+        try:
+            err = str(err.decode('ascii'))
+        except:
+            err = str(err)
+
         results.append((cmd.commands[i], out, err, res))
         if cmd.pipe_err:
             # Python treats the exit code as a signed char.

utils/lit/lit/util.py

@@ -156,4 +156,14 @@ def executeCommand(command, cwd=None, env=None):
     if exitCode == -signal.SIGINT:
         raise KeyboardInterrupt
 
+    # Ensure the resulting output is always of string type.
+    try:
+        out = str(out.decode('ascii'))
+    except:
+        out = str(out)
+    try:
+        err = str(err.decode('ascii'))
+    except:
+        err = str(err)
+
     return out, err, exitCode

utils/lit/tests/Inputs/shtest-format/external_shell/fail.txt

@@ -1,3 +1,5 @@
 # Run a command that fails with error on stdout.
 #
+# RUN: echo "line 1: failed test output on stdout"
+# RUN: echo "line 2: failed test output on stdout"
 # RUN: cat "does-not-exist"

utils/lit/tests/Inputs/shtest-format/external_shell/fail_with_bad_encoding.txt

@@ -0,0 +1,5 @@
+# Run a command that fails with error on stdout.
+#
+# RUN: %S/write-bad-encoding.sh
+# RUN: false
+

utils/lit/tests/Inputs/shtest-format/external_shell/write-bad-encoding.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "a line with bad encoding: Â."

utils/lit/tests/Inputs/shtest-format/fail.txt

@@ -1 +1,2 @@
+# RUN: printf "line 1: failed test output on stdout\nline 2: failed test output on stdout"
 # RUN: false

utils/lit/tests/shtest-format.py

@@ -8,14 +8,41 @@
 # CHECK: -- Testing:
 
 # CHECK: FAIL: shtest-format :: external_shell/fail.txt
-# CHECK: *** TEST 'shtest-format :: external_shell/fail.txt' FAILED ***
+# CHECK-NEXT: *** TEST 'shtest-format :: external_shell/fail.txt' FAILED ***
+# CHECK: Command Output (stdout):
+# CHECK-NEXT: --
+# CHECK-NEXT: line 1: failed test output on stdout
+# CHECK-NEXT: line 2: failed test output on stdout
 # CHECK: Command Output (stderr):
-# CHECK: cat: does-not-exist: No such file or directory
+# CHECK-NEXT: --
+# CHECK-NEXT: cat: does-not-exist: No such file or directory
+# CHECK: --
+
+# CHECK: FAIL: shtest-format :: external_shell/fail_with_bad_encoding.txt
+# CHECK-NEXT: *** TEST 'shtest-format :: external_shell/fail_with_bad_encoding.txt' FAILED ***
+# CHECK: Command Output (stdout):
+# CHECK-NEXT: --
+# CHECK-NEXT: a line with bad encoding:
 # CHECK: --
 
 # CHECK: PASS: shtest-format :: external_shell/pass.txt
 
 # CHECK: FAIL: shtest-format :: fail.txt
+# CHECK-NEXT: *** TEST 'shtest-format :: fail.txt' FAILED ***
+# CHECK-NEXT: Script:
+# CHECK-NEXT: --
+# CHECK-NEXT: printf "line 1
+# CHECK-NEXT: false
+# CHECK-NEXT: --
+# CHECK-NEXT: Exit Code: 1
+#
+# CHECK: Command Output (stdout):
+# CHECK-NEXT: --
+# CHECK-NEXT: Command 0: "printf"
+# CHECK-NEXT: Command 0 Result: 0
+# CHECK-NEXT: Command 0 Output:
+# CHECK-NEXT: line 1: failed test output on stdout
+# CHECK-NEXT: line 2: failed test output on stdout
 
 # CHECK: UNRESOLVED: shtest-format :: no-test-line.txt
 # CHECK: PASS: shtest-format :: pass.txt
@@ -31,8 +58,9 @@
 # CHECK: Unexpected Passing Tests (1)
 # CHECK: shtest-format :: xpass.txt
 
-# CHECK: Failing Tests (2)
+# CHECK: Failing Tests (3)
 # CHECK: shtest-format :: external_shell/fail.txt
+# CHECK: shtest-format :: external_shell/fail_with_bad_encoding.txt
 # CHECK: shtest-format :: fail.txt
 
 # CHECK: Expected Passes    : 3
@@ -40,4 +68,4 @@
 # CHECK: Unsupported Tests  : 2
 # CHECK: Unresolved Tests   : 1
 # CHECK: Unexpected Passes  : 1
-# CHECK: Unexpected Failures: 2
+# CHECK: Unexpected Failures: 3